## What is the minimum value of 9 cos x?

(A)–9

(B)–2

(C)0

(D)2

(E)9

The Correct Answer

Explanation

What is the additive inverse of the polynomial 5x^{3} - 4x^{2} + 6x - 9?

（A）-5x^{3} + 4x^{2} - 6x - 9
（B） -5x^{3} + 4x^{2} - 6x + 9
（C） 5x^{3} - 4x^{2} + 6x - 9
（D） -9 + 6x - 4x^{2} + 5x^{3}
（E） 9 - 6x - 4x^{2} + 5x^{3}

**Correct Answer: B**

What is the least integer value of x that makes the inequality true?

（A）7 （B） 8 （C） 9 （D） 10 （E） 11

**Correct Answer: C**

If the function f(a, b) is defined as f(a,b) = 2ab - (a + b), then f(3,4) = ?

（A）7 （B） 17 （C） 21 （D） 24 （E） 31

**Correct Answer: B**

### More ACT Math Exam Questions

- 1If a is a factor of 32 and b is a factor of 45, the product of a and b could NOT be which of the following?
- 2What is the value of the expression 2x
^{3}- x^{2}+ 3x + 5 for x = -2? - 3The nth term of an arithmetic sequence, a
_{n}, is given by a_{n}= a_{1}+ dn - d, where a_{1}is the 1st term, and d is the common difference between terms. Which of the following expressions gives d in terms of a_{n}, a_{1}, and n ? - 4
Damien played golf on each of the four days of his vacation. His scores on the first three days were 93, 92, and 89, and his average for the four days was 90. What was his score on the fourth day?

- 5What is the least integer value of x that makes the inequality true?