CBSE > Class 08 > Mathematics | CBSE Board | Homework Help

According to the angle sum property of a Quadrilateral, the sum of all the four interior angles is 360 degrees.
According to the angle sum property of a trianlge, the sum of all the four interior angles is 180 degrees.

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Nikki Gautam 5 years, 7 months ago

Give a answer

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z(z+5) + 7(z+5)

Posted by Badal Raj 5 years, 7 months ago

CBSE > Class 08 > Mathematics

3 answers

Siddhesh Sawant 5 years, 7 months ago

z(z+5) + 7(z+5) = z2 + 5z + 7z + 35 = z2 + 12 z + 35 = 14z + 35

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Yogita Ingle 5 years, 7 months ago

z(z+5) + 7(z+5)

= z² + 5z + 7z + 35

= z²+ 12 z + 35

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Khushboo Shukla 5 years, 7 months ago

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Xsquare+10x+21=Xsquare+4x+81

Posted by Sanjay Prasanth 5 years, 7 months ago

CBSE > Class 08 > Mathematics

2 answers

Sri Bhava Pragalyaa 5 years, 7 months ago

X square + 10x +21 = X square + 4x + 81 Step 1 - > x square - x square + 10x - 4x = 81 - 21 [ By transposing I have bought x square and 4x left side ] Step 2 - > 6x = 60 [ x square - x square is 0 and 10x - 4x is 6x ] Step 3 -> x = 60/6 = 10 Therefore value of x = 10

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Sudhanshu Kumar 5 years, 7 months ago

What is square root

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ANSWER

Express 81 as the sum of 9 odd numbers

Posted by Satyanarayan Sharma 5 years, 7 months ago

CBSE > Class 08 > Mathematics

3 answers

Annalakshmi Senthilkumar 5 years, 7 months ago

1+3+5+7+9+11+13+15+17

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V. Deepak Kumar 5 years, 7 months ago

81- 1+3+5+7+9+11+13+15+17-9²

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Renvil Vian 5 years, 7 months ago

81 = 1+3+5+7+9+11+13+15+17 As 9^2 is 81, we have 9 continuos odd numbers

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ANSWER

Try thesefig 5.3

Posted by Abhimanyu Shinde 5 years, 7 months ago

CBSE > Class 08 > Mathematics

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size of plant cell is 0.000015 m and size of animal cell is 0.0000068m. find ratio of size of plant cell and animal cell

Posted by Fariya Sufiyan 5 years, 7 months ago

CBSE > Class 08 > Mathematics

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ANSWER

Divide the difference of 12 by 7 and 13 by 4 by the product of 4 by 5 and 25 by 2

Posted by Avinash Kumar 5 years, 7 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Find three rational number between 3 and 4

Posted by Gurleen Kaur 5 years, 7 months ago

CBSE > Class 08 > Mathematics

2 answers

Alwaan Khan ? 5 years, 7 months ago

Hlo

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Yogita Ingle 5 years, 7 months ago

A rational number between 3 and 4 is 1/2 (3 + 4) = 7/2.
Then, 3 < 7/2 < 4
A rational number between 3 and 7/2 = 1/2 {3 + 7/2} = 1/2 (3/1 + 7/2)
= 1/2 ((6 + 7)/2) = (1/2 × 13/2) = 13/4
A rational number between 7/2 and 4 = 1/2 {7/2 + 4} = 1/2 (7/2 + 4/1)
= 1/2 ((7 + 8)/2) = {1/2 × 15/2} = 15/4
Therefore, 3 < 13/4 < 7/2 < 15/4 < 4
Hence, 13/4, 7/2 and 15/4 are the three rational numbers lying between 3 and 4.

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ANSWER

What is a answer of 5x+7upon2= 3upon2x-14

Posted by Priya Gaur 5 years, 7 months ago

CBSE > Class 08 > Mathematics

1 answers

Sajal Choudhary 5 years, 7 months ago

Your question 5x+7/2=3/2x-14 Answer: By cross multiplication 5x+7(2x-14)=2×3 5x+14x-98=6 19x=6+98 19x=104 X=104/19

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IF 3, 2, x, 6 are proportion then x

Posted by Sowjanya Lekisha 5 years, 7 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Chapter 13

Posted by Suhani Gupta 5 years, 7 months ago

CBSE > Class 08 > Mathematics

1 answers

Suhani Gupta 5 years, 7 months ago

Exercise 13.3

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How many numbers lie between squares of 99 and 100?

Posted by Saloni Paradkar 5 years, 7 months ago

CBSE > Class 08 > Mathematics

2 answers

Shubham Pandey 5 years, 7 months ago

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Yogita Ingle 5 years, 7 months ago

The total numbers of natural number between two square term is given as

Let the numbers and

The total numbers are

Where, a=99 and b=100

then,

Therefore, Total natural numbers lying between squares of 99 and 100 is 198.

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Solve the following equation and check your result 1. 3x=2x+18 2. 2y+5/3=26/3-y 3. x=4/5(x+10)

Posted by Sahana Shree ?? Black Lover 5 years, 7 months ago

CBSE > Class 08 > Mathematics

2 answers

Yogita Ingle 5 years, 7 months ago

1. 3x=2x+18

3x - 2x = 18
x = 18
2. 2y+5/3=26/3-y

2y + y = 26/3 - 5/3
3y = (26 - 5)/3
3y = 21/3
3y = 7
y = 7/3

3. x=4/5(x+10

5x = 4(x + 10)
5x = 4x + 40
5x - 4x = 40
x = 40

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Sahana Shree ?? Black Lover 5 years, 7 months ago

Plz answer ?????

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9 by 16 into 4 by 12 + 9 by 16 into minus 3 by 9 find in distributive property

Posted by Avinash Kumar 5 years, 7 months ago

CBSE > Class 08 > Mathematics

1 answers

Avinash Kumar 5 years, 7 months ago

I don't know plzz help

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ANSWER

Find the square of the following numbers. 1) 41 2) 53 3) 92

Posted by Sairam Pednekar 5 years, 7 months ago

CBSE > Class 08 > Mathematics

3 answers

Yogita Ingle 5 years, 7 months ago

Find the square of the following numbers.
1) 41²

= 41  × 41 = 1681
2) 53
53  × 53 = 2809
3) 92
92  × 92 = 8464

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Avinash Kumar 5 years, 7 months ago

Me too

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Sairam Pednekar 5 years, 7 months ago

Hi please answer me

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ANSWER

Represent -7/4 on the number line

Posted by Khadeeja Hiza 5 years, 7 months ago

CBSE > Class 08 > Mathematics

4 answers

Sajal Choudhary 5 years, 7 months ago

Sabse pahle aap number line banaye usmein pahle 0 likhen Uske bad minus 1 by 4 minus 2 by 4 minus 3 by 4 minus 4 by 4 minus 5 by 4 minus 6 by 4 minus 7 by 4 -8 by 4 Uske bad usmein minus 7 by 4 circle kar de

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Balaji Jadhav Jadhav 5 years, 7 months ago

History

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Balaji Jadhav Jadhav 5 years, 7 months ago

Hhd

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Khadeeja Hiza 5 years, 7 months ago

Please tell me

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Why always triangle =180

Posted by Krishna Singh 5 years, 7 months ago

CBSE > Class 08 > Mathematics

4 answers

Omshree Daivajna 5 years, 7 months ago

Because that the less or more than 180⁰ is nuclosed shape or 4 sided shape . So triangle ? well be 180⁰c .

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Radhu R 5 years, 7 months ago

Because it is a supplymentry Angle

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Krishna Singh 5 years, 7 months ago

Oh said why always 60 +60+60......

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Nk Nk 5 years, 7 months ago

Because the sum of three angle is 180 of triangle. 60+60+60 = 180 so always triangle is 180 degree

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On what sum will the compound interest at 5% per annum for 2 years compounded annually be Rs.164?

Posted by Jaspreet Kaur 5 years, 7 months ago

CBSE > Class 08 > Mathematics

1 answers

Jaspreet Kaur 5 years, 7 months ago

Given details are, Rate = 5 % per annum Compound Interest (CI) = Rs 164 Time (t) = 2 years By using the formula, Let P be ‘x’ CI = A – P 164 = P (1 + R/100) n – P = P [(1 + R/100)n – 1] = x [(1 + 5/100)2 – 1] = x [(105/100)2 – 1] 164 = x ((1.05)2 – 1) x = 164 / ((1.05)2 – 1) x = 164 / ((1.05)2 – 1) = 164/0.1025 = Rs 1600 ∴ The required sum is Rs 1600

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Square root of 13

Posted by Kripa Verma 5 years, 7 months ago

CBSE > Class 08 > Mathematics