Math Mastery for Grade 8

Solve for x: 3x + 5 = 20

• 5

• 0

• 15

• 10

Calculate the area of a rectangle with length 8 cm and width 5 cm.

• 20 cm²

• 50 cm²

• 30 cm²

• 40 cm²

If the ratio of boys to girls in a class is 3:4, how many girls are there if there are 12 boys?

• 10

• 16

• 14

• 18

What is the sum of -7 and 15?

• -8

• 22

• 8

• 7

Find the perimeter of a triangle with sides measuring 5 cm, 7 cm, and 10 cm.

• 18 cm

• 25 cm

• 22 cm

• 20 cm