TSIA2 College Readiness Math 5

Question 1

Which of the following is equivalent to 2^(−3)?

Accepted Answer

1/8

Answer

A negative exponent means the reciprocal: 2^(−3) = 1/2³ = 1/8.

Question 2

If 40% of a number is 28, what is the number?

Accepted Answer

70

Answer

0.40 × n = 28, so n = 28 / 0.40 = 70.

Question 3

What is the range of f(x) = −x² + 4?

Accepted Answer

y ≤ 4

Answer

The parabola opens downward with vertex at (0, 4), so y can be at most 4.

Question 4

Which equation represents a line parallel to y = 2x − 1?

Accepted Answer

y = 2x + 5

Answer

Parallel lines have the same slope; y = 2x + 5 has slope 2, matching the original.

Question 5

A boat travels upstream at 8 mph and downstream at 12 mph. What is the speed of the current?

Accepted Answer

2 mph

Answer

Current = (downstream − upstream) / 2 = (12 − 8) / 2 = 2 mph.

(TSIA2) Texas Success Initiative Assessment 2.0 Practice Test