Question

WRITE 20 MATH QUESTIONS AND ANSWERS FOR GRADE 8

Answer 1

1. What is the value of x in the equation 2x + 5 = 17?

Answer: x = 6

2. Simplify the expression 3x - 5y + 2x + y, when x = 4 and y = 7.

Answer: 9x - 4y = 9(4) - 4(7) = 36 - 28 = 8

3. Solve the equation 4(x + 3) = 32.

Answer: x = 5

4. Evaluate the expression 5(3 + 2)².

Answer: 125

5. Find the area of a rectangle with length 6 cm and width 4 cm.

Answer: 24 cm²

6. What is the slope-intercept form of the equation of a line with slope 2 and y-intercept 3?

Answer: y = 2x + 3

7. Solve the equation 3(2x - 5) = 21.

Answer: x = 8

8. Simplify the expression 4² - 6 + 2(3x + 1).

Answer: 16 + 2(3x + 1) = 16 + 6x + 2 = 6x + 18

9. Find the volume of a cube with side length 5 cm.

Answer: 125 cm³

10. Solve the equation 2(x - 3) + 4 = 14.

Answer: x = 10

11. Simplify the expression 7x² + 3x - 4x² + 2x - 5.

Answer: 3x² + 5x - 5

12. Find the perimeter of a rectangle with length 8 cm and width 5 cm.

Answer: 26 cm

13. Solve the equation -2(x + 6) = 10.

Answer: x = -8

14. Simplify the expression 2² + 3(4 - 2).

Answer: 10

15. Find the area of a triangle with base 6 cm and height 3 cm.

Answer: 9 cm²

16. Solve the equation 5(x - 2) - 3(x + 1) = 7.

Answer: x = 6

17. Simplify the expression 2(3x - 4) + 5(2x + 1).

Answer: 19x + 2

18. Find the circumference of a circle with radius 5 cm. (Use π ≈ 3.14)

Answer: 31.4 cm

19. Solve the equation 3(x - 4) = 18.

Answer: x = 10

20. Simplify the expression 2(5x - 3)² - 4x + 5.

Answer: 50x² - 60x + 19