CBSE > Class 07 > Mathematics | CBSE Board | Homework Help

A mathematical equation which represents the relationship of two expressions on either side of the sign. It mostly has one variable and equal to symbol. Example: 2x – 4 = 2.

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Jaithra Paul 5 years, 5 months ago

A mathematical equation which represents the relationship of two expressions on either side of the sign. It mostly has one variable and equal to symbol. Example: 2x – 4 = 2.

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Yogita Ingle 5 years, 5 months ago

An equation is a condition on a variable. It says that two expressions are equal.

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ANSWER

3(b+4)—7=4b+14

Posted by Srajal Gupta 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Yogita Ingle 5 years, 5 months ago

3(b+4)—7=4b+14

3b + 12 - 7=4b + 14

3b + 5 = 4b + 14
3b - 4b = 14 - 5
-b = 9

b = -9

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What is the least number of years for which simple interest must be reckoned at 3 p.c. on Rs. 212.50 so that interest may be an exact number of rupees

Posted by Jaithra Paul 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Yogita Ingle 5 years, 5 months ago

S.I = P × r × t/100

here, P = 212.50 Rs.

r = 3 % and t = ?

so, S.I = 212.50× 3 × t/100

= 637.5t/100

= 127.5t/20

=25.5t/4

now, you can see that , Simple interest will be exact number of rupees when t = 8,16

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ANSWER

2b-b+b

Posted by Surendra Singh 5 years, 5 months ago

CBSE > Class 07 > Mathematics

5 answers

Jaithra Paul 5 years, 5 months ago

2b-b+b = 2b(-b and b are cut off)

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Tanuja Chaitanya 5 years, 5 months ago

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Keya Katariya Keya Katariya 5 years, 5 months ago

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Aaradhaya Dixit 5 years, 5 months ago

2b-b+b =2b

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My Cbse Study Guide 5 years, 5 months ago

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ANSWER

What is integers

Posted by Piyush Raj Piyush Kumar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

5 answers

Jaithra Paul 5 years, 5 months ago

An integer is a number that can be written without a fractional component.The set of integers consists of zero, the positive natural numbers, also called whole numbers or counting numbers, and their additive inverses. Ex- 21, -50 etc.

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Anjali Singh 5 years, 5 months ago

All natural numbers,0 and negatives of counting numbers are called integers

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Srivishnu P 5 years, 5 months ago

A set of numbers which contain negative numbers and positive numbers is called integers. (.....-2,-1,0,1,2.....)

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Yogita Ingle 5 years, 5 months ago

A whole number, from zero to positive or negative infinity is called Integers. I.e. it is a set of numbers which include zero, positive natural numbers and negative natural numbers. It is denoted by letter Z.

Z = {…,-2,-1, 0, 1, 2…}

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Keya Katariya Keya Katariya 5 years, 5 months ago

It is a set of number

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ANSWER

Explain me how to find upper limit and lower limit

Posted by Krishnat Zende 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

What is the probability of winning a cricket match

Posted by Krishnat Zende 5 years, 5 months ago

CBSE > Class 07 > Mathematics

3 answers

Krishnat Zende 5 years, 5 months ago

Explain me how to find upper limit and lower limit

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Aiswarya Balaji 5 years, 5 months ago

The probability that India wins a cricket test match against England is 31. If India and England play 3 matches, the probability that India will win atleast one match is.

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Avirohan Priyam 5 years, 5 months ago

PROBABILITY = ANSWERS WE WANT / ALL POSSIBLE ANSWER ANSWER WE WANT = 1(AS WE WANT TO WIN THE MATCH) ALL POSSIBLE ANSWERS = 2(AS THERE IS A CHANCE OF US TO EITHER WIN THE MATCH OR LOSE IT) PROBABILITY = 1 / 2 OF 100% = 50%

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ANSWER

Write a pair of integer whose product is(-12)

Posted by Dharmendra Kumar Singh 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Yogita Ingle 5 years, 5 months ago

pair of integers whose product is –12 is -2,6 and -4,3

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ANSWER

Find x in interior

Posted by Jaismeen Gill 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

Ex -1.4 question no.4

Posted by Lakshay Vashist 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Remix Harsh Raman 5 years, 5 months ago

Divide the both integer's. Example (-4) divide with 2 .Then the answer will be (-2) because the bigger integer have the symbol - so the solution will be 2 will be negative integer means -2

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ANSWER

2+2times square of 12230

Posted by Nidhi Bisht 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

Please answer anyone my rest questions

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

(4.6-13/4)of12.6-[12.6-{63/5-(4.2+6/5)}]

Posted by Varneet Toor 3 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Deepak Malik 5 years, 5 months ago

Ans 5 of ex 3.3

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ANSWER

(4.6-13/4)of12.6-[12.6-{63/5-(4.2+6/5

Posted by Varneet Toor 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Kelaah Sharma 4 years, 5 months ago

answer is = 11.61

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ANSWER

Sushila is walking with a constant speed of 4.2km/h.How much distance will she cover in 40 minutes?

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

2 answers

Jaithra Paul 5 years, 5 months ago

Given , speed s = 4.2km/h or 7/6m/s and time period t = 40min or 2400sec we know that s=d/t d=sXt d=7/6X2400 d=2800

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Gaurav Seth 5 years, 5 months ago

2.8 km

Explanation:

The speed is the change of distance with time

v = d/t

The speed in m/s will be

v = (4.2 km/h) * = 1.16 m/s.

Solve for d, we get the distance by

d = v.t = (1.16 m/s) (40* 60 s) = 2800 m = 2.8 km

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ANSWER

A boy is running at a uniform speed of 4.5m/s.How much time will he take to cover a distance of 2.25km?

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

What is the mass of a metal sphere of radius 3.0cm,if its density is 7.0g/cm3 ? Express your answer in kg too.

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Gaurav Seth 5 years, 5 months ago

d=7g/cm^3 ; r= 3

d = m/v

m=d x v

m= d x 4÷3πr^3

m= 7 x 4/3 x 22/7 x 3 x 3 x 3

m= 4 x 22 x 9 = 792 g

m= 0.792 kg

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ANSWER

An empty bottle of 25ml capacity weighs 22.6g.When completely filled with turpentine oil,it weighs 43.8g.Find the density of turpentine oil.

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

0 answers

ANSWER

Calculate the volume of a wooden object of mass 280kg,if density of wooden is 800kg/m3

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

1 answers

Gaurav Seth 5 years, 5 months ago

Calculate the volume of a wooden object of mass 280kg,if density of wooden is 800kg/m3

A n s w e r :

Formula : Volume = Mass / Density

Mass = 280 kg

Density = 800 kg / m³

Volume = 280kg/800kg m3

= 0.35 m³

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ANSWER

1+(-10)+0

Posted by Vaidharbhi Palandurkar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

5 answers

Ishta Mahour 5 years, 5 months ago

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Ishika Singh 5 years, 5 months ago

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Dipak Patel 5 years, 5 months ago

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Pranav Prabhakar 5 years, 5 months ago

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Vaidharbhi Palandurkar 5 years, 5 months ago

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Please answer anyone

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

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ANSWER

A cubical object of side 15cm weighs 1.35kg.Calulate its density in kg/m3

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

3 answers

Pranav Prabhakar 5 years, 5 months ago

This is an icse question

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Pranav Prabhakar 5 years, 5 months ago

Thank you so much

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Yogita Ingle 5 years, 5 months ago

Mass (m) = 1.35 kg

Side (a) = 15 cm = 0.15 m

Volume of a cube = side x side x side = 0.153 =0.003375 cu. M

Density (ρ) = Mass (m) / Volume (V)

=> ρ = 1.35/0.003375

=> ρ = 400 Kg/m³

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ANSWER

Solve the following equations: (d) 4+5(p-1)=34

Posted by Sanjana Sen 5 years, 5 months ago

CBSE > Class 07 > Mathematics