All India Class 8 Group

What is sex? and how does an human performs it?

Devansh Iyer answered  •  2 hours ago
Understanding Sex
Sex is a natural biological process that involves the physical union of two individuals, typically for the purpose of reproduction or expressing intimacy. It is a significant aspect of human relationships and can vary greatly in its expression and meaning.
Types of Sex
- Reproductive Sex: This is the primary biological function, where sperm fro
... more

Which of the following factor influence speed of sound most?
  • a)
    Humidity
  • b)
    Source of sound
  • c)
    Nature of medium
  • d)
    Temperature
Correct answer is option 'C'. Can you explain this answer?

Shivam Kumar answered  •  2 hours ago
Factors Influencing the Speed of Sound
The speed of sound is influenced by several factors, but the nature of the medium through which it travels is the most significant. Here’s an explanation of why the nature of the medium is crucial:
1. Nature of Medium
- The speed of sound varies in different materials. It travels fastest in solids, slower in liquids, and slowest i
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A shopkeeper sold two fans for ​₹ 1140 each. On one he loses 10%, while on the other he loses 5%. Calculate his gain or loss per cent in the whole transaction.?

Maheshwar Singh answered  •  3 hours ago
Calculation of Selling Price
The shopkeeper sold two fans for ₹1140 each.
- Selling Price (SP) of Fan 1 = ₹1140
- Selling Price (SP) of Fan 2 = ₹1140
Total Selling Price
- Total SP = SP of Fan 1 + SP of Fan 2
Total SP = ₹1140 + ₹1140 = ₹2280
Calculation of Cost Price
1. Fan 1:
- Loss = 10%
- Let Cost Price (CP) of
... more

A shopkeeper sold two fans for ​₹ 1140 each. On one he gains 10%, while on the other he loses 5%. Calculate his gain or loss per cent in the whole transaction.?

Ishan Singh answered  •  3 hours ago
Introduction
To find the overall gain or loss percentage from the sale of two fans, we first need to calculate the cost price (CP) of each fan based on the selling price (SP) and the gain or loss percentages.
Cost Price of Fan 1 (10% Gain)
- Selling Price (SP) = ₹ 1140
- Gain Percent = 10%
- Formula: CP = SP / (1 + Gain%)
- Calculation:
CP = 114
... more

The diagonal of cube is 16 root 3 cm find its surface area and volume

Ayush Unni answered  •  6 hours ago
Understanding the Cube's Diagonal
The diagonal of a cube can be expressed using the formula:
Diagonal = a * √3, where 'a' is the length of one side of the cube.
Given that the diagonal is 16√3 cm, we can find the side length 'a'.
Calculating the Side Length
- Set the diagonal equal to the formula:
a * √3 = 16√3
- To solve for 'a', divide both s
... more

I _____ use to make so many mistakes.  
  • a)
    didn't
  • b)
    don't
  • c)
    hadn't
  • d)
    wouldn't
Correct answer is option 'A'. Can you explain this answer?

Jay Joshi answered  •  9 hours ago
Understanding the Correct Answer: "didn't"
The sentence "I _____ use to make so many mistakes" requires a form of the verb "to do" in the past tense to convey a past habit or situation. The correct answer is option 'A': "didn't." Here’s why:
1. Past Tense Context
- The phrase "use to" indicates a habitual action in the past.
- To express this in the negative form
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In a certain code, MAHESH is written as NCIGTJ. In this code, NEELAM will be written as:
  • a)
    OGGNCO
  • b)
    OGFNBN
  • c)
    OGFNBO
  • d)
    PFGMCN
Correct answer is option 'C'. Can you explain this answer?

Jay Joshi answered  •  9 hours ago
Understanding the Code
To decode the transformation from "MAHESH" to "NCIGTJ", we will analyze how each letter is modified.
Letter Mapping
- M → N: +1
- A → C: +2
- H → I: +1
- E → G: +2
- S → T: +1
- H → J: +2
This pattern alternates between adding 1 and adding 2 to the position of each letter in the alphabet.
Applying the Same Co
... more
Now, we will apply the same pattern to "NEELAM":
1. N:
- Position: 14
- Code: 14 + 1 = 15 → O
2. E:
- Position: 5
- Code: 5 + 2 = 7 → G
3. E:
- Position: 5
- Code: 5 + 1 = 6 → F
4. L:
- Position: 12
- Code: 12 + 2 = 14 → N
5. A:
- Position: 1
- Code: 1 + 1 = 2 → B
6. M:
- Position: 13
- Code: 13 + 2 = 15 → O
Final Code for NEELAM
Combining all the letters, "NEELAM" is transformed to "OGFNBO".
Conclusion
The correct option for how "NEELAM" is written in the code is option C) OGFNBO.

Sunrise chapter on industries?

Partho Banerjee answered  •  13 hours ago
Introduction to Industries
Industries are vital segments of the economy that transform raw materials into finished goods. They play a crucial role in generating employment, contributing to GDP, and enhancing the standard of living.
Types of Industries
Industries can be classified into various categories based on their nature and functions:
  • Primary Indus... more These involve the extraction of natural resources. Examples include agriculture, mining, and fishing.
  • Secondary Industries: These industries transform raw materials into finished products. Manufacturing and construction fall under this category.
  • Tertiary Industries: Also known as service industries, they provide services rather than goods. Examples include banking, healthcare, and education.

Importance of Industries
Industries are essential for several reasons:
  • Economic Growth: They contribute significantly to the economy by generating income and employment.
  • Innovation: Industries drive technological advancements, leading to new products and improved services.
  • Infrastructure Development: Industrial growth often leads to better infrastructure, including transportation and communication.

Challenges Faced by Industries
Industries encounter various challenges that can hinder their growth:
  • Environmental Concerns: Industrial activities can lead to pollution and resource depletion.
  • Global Competition: Industries must compete with international markets, which can affect local businesses.
  • Regulatory Issues: Compliance with government regulations can be a complex and costly process.

Conclusion
Understanding the role and types of industries provides insight into their impact on society and the economy. By addressing challenges, industries can contribute to sustainable development and enhance overall prosperity.

C.K. Janu is ..............
  • a)
    An engineer
  • b)
    A doctor
  • c)
    An archaeologist
  • d)
    An activist
Correct answer is option 'D'. Can you explain this answer?

Siddharth Nambiar answered  •  23 hours ago
Introduction to C.K. Janu
C.K. Janu is a prominent figure known for her significant contributions to social activism, particularly in the context of environmental and indigenous rights in India.
Background
- C.K. Janu hails from the Adivasi community, which is indigenous to the forests of Kerala, India.
- She has been an influential advocate for the rights of trib
... more

What did he find solace in, that evening?
  • a)
    Lemonade
  • b)
    Jalebis
  • c)
    Both a and b
  • d)
    None of the above
Correct answer is option 'C'. Can you explain this answer?

Siddharth Nambiar answered  •  23 hours ago
Understanding the Context
In the scenario presented, the individual finds comfort in both lemonade and jalebi. This indicates a moment of emotional relief or joy derived from indulging in these treats.
Significance of Lemonade
- Refreshing and Cooling: Lemonade is often associated with refreshment and relaxation, especially on a warm evening.
- Symbol o
... more The simplicity of lemonade can evoke childhood memories, enhancing feelings of nostalgia and comfort.
Significance of Jalebi
- Sweetness and Indulgence: Jalebi, being a sweet dessert, can provide a sense of indulgence and happiness.
- Rich Cultural Connection: It is often linked with celebrations and joyous occasions, further adding to its comforting nature.
Conclusion: The Combination
- Dual Sources of Comfort: By finding solace in both lemonade and jalebi, the individual experiences a multifaceted comfort.
- Emotional Resonance: Each item contributes uniquely to their sense of well-being, reflecting how different flavors and experiences can coexist to elevate one's mood.
In conclusion, the correct answer is option 'C' because both lemonade and jalebi serve as sources of solace, highlighting the importance of food in emotional health and happiness.

The outermost layer of earth is called
  • a)
    crust
  • b)
    Mountain
  • c)
    Core
  • d)
    Mantle
Correct answer is option 'A'. Can you explain this answer?

Ishita Chauhan answered  •  yesterday
Understanding Earth's Layers
The Earth is composed of several distinct layers, each with unique characteristics and functions. The outermost layer is known as the crust.
What is the Crust?
- The crust is the Earth’s outer shell, forming a thin layer compared to the other layers beneath it.
- It varies in thickness from about 5 kilometers (3 miles) under the oceans
... more

Why you not hear the Echo if you stand 10 M away from a wall and shoot towards it answer for class 8?

Sounak Desai answered  •  yesterday
Understanding Echo
When you produce a sound, it travels in waves. If these sound waves hit a wall, they bounce back, creating what we call an echo. However, whether or not you hear this echo depends on several factors, including distance, time, and sound intensity.
Distance from the Wall
- When you stand 10 meters away from the wall and produce a sound, the sound waves
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Why you cannot hear the Echo if you stand 10 M away from a wall and shoot towards it answer for class 8?

Pritam Iyer answered  •  yesterday
Understanding Echoes
An echo is a sound that is reflected off a surface and returned to the listener. To hear an echo, certain conditions must be met. Here’s why you might not hear an echo when standing 10 meters away from a wall:
Distance and Time
- Sound travels at a speed of approximately 343 meters per second in air.
- When you shout towards the wall, the soun
... more

निम्नलिखित गद्यांशों को ध्यानपूर्वक पढ़कर नीचे दिए गए प्रश्नों के सही उत्तर विकल्पों में से चुनिएः
ग्रामीण पुडुकाट्टई के मुख्य इलाकों में अत्यंत रूढि़वादी पृष्ठभूमि से आईं युवा मुस्लिम लड़कियाँ सडक़ों से अपनी साइकिलों पर जाती हुई दिखाई देती हैं। जमीला बीवी नामक एक युवती ने, जिसने साइकिल चलाना शुरू किया है, मुझसे कहा—‘‘यह मेरा अधिकार है, अब हम कहीं भी जा सकते हैं। अब हमें बस का इंतज्जार नहीं करना पड़ता। मुझे किया तो लोग .फब्तियाँ कसते थे। लेकिन मैंने उस पर कोई ध्यान नहीं दिया।’’
प्रश्न: जमीला को साइकिल चलाता देखकर लोगों की क्या प्रतिक्रिया होती थी?           
  • a)
      वे उसे प्रोत्साहित करते थे   
  • b)
    वे उसकी प्रशंसा करते थे           
  • c)
    वे उसे ताने मारते थे       
  • d)
    वे उससे जलते थे
Correct answer is option 'C'. Can you explain this answer?

Nishanth Ghosh answered  •  yesterday
प्रस्तावना
गद्यांश में जमीला बीवी एक युवा मुस्लिम लड़की है, जिसने साइकिल चलाना शुरू किया है। यह उसके लिए एक नया अनुभव है, जो उसके अधिकार और स्वतंत्रता का प्रतीक है।
लोगों की प्रतिक्रिया
जब जमीला ने साइकिल चलाना शुरू किया, तो उसके प्रति लोगों की प्रतिक्रिया नकारात्मक थी।
  • जमीला ने कहा कि "लोग फब्तियाँ कसते थे," जो यह दर्शाता है कि समाज के कुछ वर्गों ने उसे... more
  • इसका मतलब यह है कि लोग उसके साइकिल चलाने को सही नहीं मानते थे और उसे इस पर ताना मारकर अपनी राय व्यक्त करते थे।

निष्कर्ष
इसलिए, सही उत्तर विकल्प 'C' है, जो दर्शाता है कि लोग जमीला को ताने मारते थे। यह जमीला की स्वतंत्रता और अधिकार की खोज में समाज के रूढ़िवादी दृष्टिकोण को उजागर करता है।

"the warrior had an inspiration "- what was the inspiration?

Meera Chakraborty answered  •  yesterday
Inspiration for the Warrior
The warrior's inspiration came from a profound realization about his purpose and the strength of unity.
Understanding His Purpose
- The warrior reflected on his role, realizing that true strength lies not just in combat, but in protecting his people and upholding their values.
- This understanding ignited a deep sense of responsibility
... more

How does the lens in the human eye adjust to focus on near and distant objects?
  • a)
    By changing its shape
  • b)
    By altering the iris size
  • c)
    By changing the amount of light
  • d)
    By adjusting the retina's position
Correct answer is option 'A'. Can you explain this answer?

Shreya Mukherjee answered  •  yesterday
How the Human Eye Focuses
The human eye is a complex organ that adjusts to focus on objects at varying distances through a process called accommodation. The primary mechanism of this process is the ability of the lens to change its shape.
Lens Adjustment
- The lens is a flexible, transparent structure located behind the iris.
- When focusing on distant objects, th
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What is the main purpose of using optical aids for visually impaired individuals?
  • a)
    To enhance tactile feedback
  • b)
    To provide auditory information
  • c)
    To correct or enhance vision
  • d)
    To offer financial assistance
Correct answer is option 'C'. Can you explain this answer?

Mira Sen answered  •  yesterday
Main Purpose of Optical Aids
Optical aids are essential tools designed to assist visually impaired individuals by enhancing their ability to see. The primary purpose of these aids is to correct or enhance vision, making it easier for users to engage with their environment.
Key Features of Optical Aids
- Vision Correction:
Optical aids are specifically de
... more

There are many stars which are hotter than the sun.
  • a)
    True
  • b)
    False
Correct answer is option 'A'. Can you explain this answer?

Jhanvi Basak answered  •  yesterday
Introduction
Many stars in the universe indeed have temperatures that exceed that of our Sun. The Sun's surface temperature is approximately 5,500 degrees Celsius (about 9,932 degrees Fahrenheit). Understanding the types of stars and their temperatures helps us appreciate the diversity of stellar bodies in our galaxy.
Types of Stars
- Hotter Stars:
- O
... more
- These are the hottest stars, with temperatures ranging from 30,000 to 50,000 degrees Celsius.
- B-type Stars:
- These stars have temperatures between 10,000 and 30,000 degrees Celsius, making them significantly hotter than the Sun.
- Comparative Analysis:
- Many stars, especially those classified as O and B types, are much hotter than the Sun.
- The Hertzsprung-Russell diagram categorizes stars based on their temperature and luminosity, showing that hotter stars are often more luminous.
Implications of Stellar Temperatures
- Lifespan and Evolution:
- Hotter stars burn their fuel much faster than cooler stars, leading to shorter lifespans.
- They often end their life cycles in spectacular supernova explosions.
- Impact on Surrounding Space:
- The intense heat from hotter stars can influence the formation of planets and the chemical composition of nearby space.
Conclusion
In summary, the existence of stars that are significantly hotter than the Sun is a well-accepted fact in astronomy. This diversity in stellar temperatures enriches our understanding of the universe and the life cycles of stars.

What is present in milk which make it conductive?

Debanshi Tiwari answered  •  yesterday
Milk Conductivity: Understanding the Components
Milk is a complex liquid that contains several components contributing to its conductivity. Here’s a detailed explanation of what makes milk conductive.
1. Water Content
- Milk is primarily composed of water, which is a good conductor of electricity due to its ability to dissolve ionic substances and facilitate the movement of
... more

Meaning of predominant?

Nishtha Iyer answered  •  yesterday
Meaning of Predominant
The term "predominant" refers to something that is the most common, influential, or powerful in a particular context. It signifies the presence of a certain quality, characteristic, or element that stands out above others.
Key Characteristics of Predominant
  • Dominance: This indicates that a specific feature or aspect is more prevale... more
  • Influence: The predominant factor often has a significant impact on the outcome or direction of events.
  • Commonality: It highlights what is frequently observed or experienced within a group or environment.

Usage in Different Contexts
  • In Society: Predominant cultures or traditions are those that are widely accepted or practiced within a community.
  • In Science: A predominant species in an ecosystem is one that plays a major role in defining the structure of that environment.
  • In Business: A predominant market player refers to a company that holds a significant share and influence over the market.

Conclusion
Understanding the term "predominant" helps in recognizing the key elements that shape our surroundings, be it in culture, nature, or industries. Identifying what is predominant allows for better analysis and comprehension of various situations.

What is animal husbandry class 8?

Rajeev Patel answered  •  2 days ago
Introduction to Animal Husbandry
Animal husbandry is the branch of agriculture that focuses on the breeding and care of farm animals. It plays a vital role in providing food, clothing, and other products to meet human needs.
Importance of Animal Husbandry
Animal husbandry is essential for various reasons:
  • Food Production: It provides meat, milk, eg... more
  • Economic Benefits: Livestock farming contributes significantly to the economy by providing jobs and income.
  • Resource Utilization: Animals convert inedible plant materials into nutritious food for humans.

Types of Animals in Animal Husbandry
There are several types of animals commonly raised in animal husbandry:
  • Cattle: Used for milk, meat, and labor.
  • Sheep: Raised for wool, meat, and milk.
  • Goats: Known for their milk, meat, and skin.
  • Poultry: Chickens and ducks are raised for eggs and meat.
  • Pigs: Primarily raised for meat production.

Practices in Animal Husbandry
Successful animal husbandry involves various practices:
  • Breeding: Selecting animals with desirable traits for reproduction.
  • Feeding: Providing balanced nutrition to ensure healthy growth.
  • Healthcare: Regular vaccinations and veterinary care to prevent diseases.
  • Housing: Creating suitable living conditions for animals to thrive.

Conclusion
In conclusion, animal husbandry is a crucial component of agriculture that supports food security and economic development. Understanding its principles helps us appreciate the role of livestock in our lives.
All In One asked a question

निम्नलिखित गद्यांशों को ध्यानपूर्वक पढ़कर नीचे दिए गए प्रश्नों के सही उत्तर विकल्पों में से चुनिएः
इस जिले में साइकिल की धूम मची हुई है। इसकी प्रशंसकों में हैं- महिला खेतिहर मज़दूर पत्थर खदानों में मजदूरी करनेवाली औरतें और गाँवों में काम करनेवाली नर्सें। बालवाड़ी और आँगनवाड़ी कार्यकर्ता, बेशकीमती पत्थरों को तराशने में लगी औरतें और स्कूल की अध्यापिकाएँ भी साइकिल का जमकर इस्तेमाल कर रही हैं। ग्राम सेविकाएँ और दोपहर का भोजन पहुँचानेवाली औरतें भी पीछे नहीं हैं। सबसे बड़ी संख्या उन लोगों की है जो अभी नवसाक्षर हुई हैं। जिस किसी नवसाक्षर अथवा नयी-नयी साइकिल चलानेवाली महिला से मैंने बातचीत की, उसने साइकिल चलाने और अपनी व्यक्तिगत आजादी के बीच एक सीधा संबंध बताया।    
प्रश्न:साइकिल चलाने और व्यक्तिगत आशादी का संबंध् किस तरह जुड़ा है?           
  • a)
    साइकिल चलाकर समय गँवाते हुए   
  • b)
    साइकिल से अध्कि दूर जाकर           
  • c)
    साइकिल चलाने से बचे समय का अपनी मर्जी से उपयोग करके          
  • d)
    साइकिल चलाते हुए दूसरों से मिलकर
Correct answer is option 'C'. Can you explain this answer?

What si Cloning?

Nilotpal Sengupta answered  •  2 days ago
What is Cloning?
Cloning is a scientific process that involves creating an identical copy of an organism or a specific gene. This technique has gained significant attention in various fields, including biology, medicine, and agriculture.
Types of Cloning
- Reproductive Cloning:
- Involves creating a complete organism that is genetically identical to the d
... more

Write an article for the school magazine on importance of ai?

Siddharth Malik answered  •  2 days ago
The Importance of AI in Our Lives
Artificial Intelligence (AI) has become an integral part of our daily lives, shaping the way we interact with technology and the world around us. Understanding its importance can help us appreciate its potential and impact.
1. Enhancing Efficiency
- AI automates repetitive tasks, allowing humans to focus on more complex and creative wo
... more

Describe how minorities are marginalised?

Palak Menon answered  •  2 days ago
Understanding Marginalization of Minorities
Marginalization refers to the social process where certain groups are pushed to the edges of society, limiting their access to resources, rights, and opportunities. This is particularly evident in the treatment of minorities.
Social Exclusion
- Minorities often face discrimination in various social settings, such as schools,
... more

Describe :minorities and marginalisation?

Prateek Ghoshal answered  •  2 days ago
Understanding Minorities
Minorities refer to groups of people who differ from the larger population in aspects such as ethnicity, religion, language, or cultural identity. These groups often face unique challenges and are frequently underrepresented in various societal contexts.
Characteristics of Minorities
- Cultural Distinctiveness: Minorities maintain distin
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Often this process of dispossession and displacement can be painful . explain in context with adivasi community?

Asha Chakraborty answered  •  2 days ago
Understanding Dispossession and Displacement in Adivasi Communities
The Adivasi community, often referred to as indigenous or tribal people in India, faces significant challenges related to dispossession and displacement. This process can lead to severe socio-economic and cultural repercussions.
Causes of Dispossession
- Industrial Development: Large-scale indus
... more

निम्नलिखित गद्यांशों को ध्यानपूर्वक पढ़कर नीचे दिए गए प्रश्नों के सही उत्तर विकल्पों में से चुनिएः
खैर, एक दिन और बीता। पाँचवें दिन घबराकर उन्होंने बिलवासी मिश्र को अपनी विपदा सुनाई। संयोग कुछ ऐसा बिगड़ा था कि बिलवासी जी भी उस समय बिलकुल खुक्ख थे। उन्होंने कहा‘‘मेरे पास हैं तो नहीं, पर मैं कहीं से माँग-जाँचकर लाने की कोशिश करूँगा और अगर मिल गया तो कल शाम को तुमसे मकान पर मिलूँगा।’’
 प्रश्न:‘संयोग’ शब्द का उचित संध्-िविच्छेद होगा-         
  • a)
    स +योग   
  • b)
    सन् + योग   
  • c)
    सम् + योग   
  • d)
    सम+योग
Correct answer is option 'C'. Can you explain this answer?

EduRev Class 8 answered  •  2 days ago
‘संयोग’ शब्द का उचित संधि-विच्छेद सम् + योग होगा।
संयोग का अर्थ होता है ‘योग का सम्यक रूप’, जो संयोग, मेल या मिलन का सूचक है।
इसलिए, सही उत्तर है c) सम् + योग

Solve the following:
Simplify the following
(x + 3y)(x - 2y) + ( y+ 4x)(y- 3x)?

Charvi Sengupta answered  •  2 days ago
Step 1: Expand the Expressions
To simplify the expression (x + 3y)(x - 2y) + (y + 4x)(y - 3x), we start by expanding each part using the distributive property.
- For (x + 3y)(x - 2y):
- x * x = x^2
- x * (-2y) = -2xy
- 3y * x = 3xy
- 3y * (-2y) = -6y^2
Combining these, we get:
- x^2 + (3xy - 2xy) - 6y^2 = x^2 + xy - 6y^2
- For (y + 4x)(y - 3x
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Multiply (3ײ + 5y²) by (5ײ -3y²).
Factorice ײ +6x-16.?

Manasa Sharma answered  •  2 days ago
Multiplying Polynomials
To multiply the polynomials (3x² + 5y²) and (5x² - 3y²), follow the distributive property (also known as the FOIL method for binomials):
- Step 1: Distribute Each Term
- Multiply 3x² by both terms in the second polynomial.
- Multiply 5y² by both terms in the second polynomial.
- Step 2: Perform the Multiplications
- 3x²
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Factorise m²-16
subtract 6x²-4xy+5y² from 8y²+16xy-3x²?

Anshu Choudhary answered  •  2 days ago
Step 1: Factorise m² - 16
To factorise the expression m² - 16, we recognize it as a difference of squares. The formula for factoring a difference of squares is:
a² - b² = (a - b)(a + b)
In this case:
- a = m
- b = 4 (since 16 = 4²)
Thus, we factor it as:
- (m - 4)(m + 4)
Step 2: Subtract 6x² - 4xy + 5y² from 8y² + 16xy - 3x²
Let’s first wr
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2x[3x+5xy] find the product
divide [10x -25] ÷5?

Arnab Ghosh answered  •  2 days ago
Step 1: Expand the Expression
To find the product of 2x[3x + 5xy], we first need to distribute 2x across the terms inside the brackets.
- Multiply 2x by 3x:
- 2x * 3x = 6x^2
- Multiply 2x by 5xy:
- 2x * 5xy = 10xy^2
So, the expanded expression is:
- 6x^2 + 10xy^2
Step 2: Divide the Expression
Next, we will divide the expression [10x - 25
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4x³-3x²+8x for x =-1?

Harsh Patel answered  •  2 days ago
Step 1: Substitute the Value of x
To evaluate the expression 4x³ - 3x² + 8x for x = -1, we first substitute -1 into the expression:
- 4(-1)³
- - 3(-1)²
- + 8(-1)
Step 2: Calculate Each Term
Now, let's calculate each term separately:
- First Term:
- 4(-1)³ = 4(-1) = -4
- Second Term:
- -3(-1)² = -3(1) = -3
- T
... more:
- 8(-1) = -8
Step 3: Combine the Results
Next, we add the results of each term together:
- -4 + (-3) + (-8)
This simplifies to:
- -4 - 3 - 8
Step 4: Final Calculation
Now, let's perform the addition:
- -4 - 3 = -7
- -7 - 8 = -15
Final Result
The value of the expression 4x³ - 3x² + 8x when x = -1 is:
- -15
This means that when you substitute -1 into the expression, the result is -15.

The percentage of Muslim children attending Madarsas is ...........
  • a)
    4
  • b)
    66
  • c)
    30
  • d)
    100
Correct answer is option 'A'. Can you explain this answer?

Simran Choudhary answered  •  2 days ago
Understanding Madarsas and Muslim Children Attendance
Madarsas are educational institutions primarily for Muslim children, where they learn about Islamic teachings, Quran, and other subjects. The percentage of Muslim children attending these institutions can vary based on several factors, including geographical location, socio-economic status, and educational policies.
Key Poin
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- Demographics: The attendance percentage can significantly differ across regions. In some areas, a higher percentage of Muslim children may attend Madarsas, while in others, the figures could be lower.
- Option A - 4%: This figure may reflect a specific study or survey indicating that only a small minority of Muslim children are enrolled in Madarsas. This might suggest a trend towards mainstream education or alternative schooling options.
- Alternative Options: Many Muslim families might prefer enrolling their children in regular schools, which offer a broader curriculum, including secular subjects alongside religious education.
- Access and Affordability: The accessibility and affordability of Madarsas can also play a crucial role. In urban areas, families might have more options, leading to lower attendance in traditional Madarsas.
- Changing Educational Trends: With the increasing emphasis on formal education, many Muslim families are opting for schools that provide both religious and academic education, contributing to the lower attendance rates in Madarsas.
Conclusion
The figure of 4% indicates a specific context and highlights the changing landscape of education among Muslim children. Understanding these dynamics is essential for policymakers and educators to address the educational needs of the community effectively.

The plastid responsible for fruit colour is :
  • a)
    chromoplast
  • b)
    amyloplast
  • c)
    chloroplast
  • d)
    leucoplast
Correct answer is option 'A'. Can you explain this answer?

Kavya Singh answered  •  2 days ago
Understanding Chromoplasts
Chromoplasts are specialized plastids found in plant cells that are primarily responsible for the pigmentation of fruits and flowers. They contain various pigments that contribute to the vibrant colors we see in many fruits.
Key Functions of Chromoplasts:
- Color Production: Chromoplasts contain pigments such as carotenoids, which give
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A coin is tossed at random 100 times and tail is obtained 52 times. What is the probability of getting a head?

Shivani Khanna answered  •  2 days ago
Understanding the Coin Toss Experiment
When a coin is tossed, there are two possible outcomes: heads or tails. In this scenario, a coin is tossed 100 times, resulting in 52 tails. We want to calculate the probability of getting heads based on this experiment.
Calculating Total Outcomes
- The total number of tosses = 100.
- The number of tails obtained = 52.
<
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If 5278 is squared, then what will be at unit place?
  • a)
    4
  • b)
    7
  • c)
    6
  • d)
    8
Correct answer is option 'A'. Can you explain this answer?

Ankita Shah answered  •  2 days ago
Understanding the Unit Place of a Square
To determine the unit place of the square of a number, we only need to focus on the unit digit of that number.
Step-by-Step Process
1. Identify the Unit Digit
The number given is 5278. The unit digit is 8.
2. Square the Unit Digit
Now, we calculate the square of the unit digit:
8 * 8 = 64
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Following is not a database model
  • a)
    Network Database Model
  • b)
    Relational Database Model
  • c)
    Object Oriented Database Model
  • d)
    None
Correct answer is option 'C'. Can you explain this answer?

Ankita Shah answered  •  2 days ago
Understanding Database Models
Database models are essential frameworks that define how data is stored, organized, and manipulated within a database management system. Among the common types of database models are the Network Database Model, Relational Database Model, and Object-Oriented Database Model.
Network Database Model
- This model allows multiple relationships
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Why is the strips of a school bag broader?

Ritika Saha answered  •  2 days ago
Why Are Straps of a School Bag Broader?
Broad straps on a school bag serve several important functions that enhance comfort, support, and usability. Here are the key reasons:
1. Weight Distribution
- Broader straps help distribute the weight of the bag more evenly across the shoulders.
- This reduces pressure points, minimizing discomfort during prolonged use.
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6x-3 if x=1 find the value of x?

Roshni Chauhan answered  •  2 days ago
Understanding the Expression
When we have the expression 6x - 3, we need to substitute the value of x to find the result.
Step 1: Substitute the Value
- We are given x = 1.
- Substitute 1 into the expression:
6(1) - 3.
Step 2: Perform the Calculation
- Now, calculate:
6 * 1 = 6.
- Then subtract 3 from 6:
6 - 3 = 3.
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The male gamete is called?

Saranya Reddy answered  •  2 days ago
What is the Male Gamete?
The male gamete is called a sperm. It plays a crucial role in the process of reproduction in many organisms, including humans.
Structure of Sperm
- The sperm cell has a unique structure that enables it to perform its function effectively.
- It consists of three main parts:
- Head: Contains the nucleus and genetic material. It
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