Class 8 Quiz

Identify the linear equation in two variables from the given equations

• 2x = 4x + 3

• x - 3y = 6

• 4x - 4 + 8x = 5

• None of the above

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

Construct linear equation for the following statement:

Two numbers are in the ratio 5 : 7 and sum of the numbers is 120

• 5x + 7x = 120

• 5x - 7x =120

• x ⁄ 5 + x ⁄ 7 = 120

• None of the above

Write 'True' or 'False'

An algebraic statement becomes an equation when it equals something

• FALSE

• TRUE

In the expression 3m + 8, the number 3 is called the ____________.

• variable

• constant

• coefficient

• answer

Choose the best response: "A solution to an equation is ___________________."

• the answer

• the last step

• whatever Photomath tells me it is.

• the value of the variable that makes the equation true.

The degree of equation x² – 9 = 2x² is

• 0

• 1

• 2

• 3

Draw any smiley or emoticon that you like most.

Which of the following equation has x= 2 as it's solution?

• 7x=21

• 8x+2=18

• 9x+3=17

• 51-7x=7

The perimeter of the rectangle is 40cm. If the length of the rectangle is 12cm, then its breadth will be:

• 4cm

• 40cm

• 8cm

• 80cm

Answer explanation

Perimeter of a rectangle= 2×(l + b)

=> 40 = 2(12+x)

=> 12+x = 40/2

=> 12+x = 20

=> x = 20-12

=> x=8 cm