FSA Practice Test (8th Grade: Math) 3

Question 1

What is the slope of the line through points (2, 4) and (6, 12)?

Accepted Answer

2

Answer

Slope = (12 - 4)/(6 - 2) = 8/4 = 2.

Question 2

Which of these is a perfect cube?

Accepted Answer

27

Answer

27 = 3 × 3 × 3, making it a perfect cube.

Question 3

Solve the system: y = x + 1 and y = 2x - 1. What is x?

Accepted Answer

2

Answer

Setting x + 1 = 2x - 1 gives x = 2.

Question 4

A right triangle has legs of 6 and 8. What is the length of the hypotenuse?

Accepted Answer

10

Answer

By the Pythagorean theorem, √(6² + 8²) = √100 = 10.

Question 5

What is (2.5 × 10^4) × (2 × 10^3) in scientific notation?

Accepted Answer

5 × 10^7

Answer

Multiply 2.5 × 2 = 5 and add exponents 4 + 3 = 7.