## Find the value of cos A if angle A is acute and sin A = 7/10

(A) 3/10

(B) 1/9

(C) 7/√51

(D) 51/10

(E) √51/10

What is the sum of the 2 solutions of the equation x^{2} + 5x - 24 = 0?

(A) -24(B) -8(C) -5(D) 0(E) 5

**Correct Answer: C**

For which of the following values of a will there be exactly one real solution to the equation 2x^{2} - ax + 8 = 0?

（A）2 （B） 4 （C） 4 （D） 6 （E） 8

**Correct Answer: E**

Given the equation - x + 6y = 18, which of the following equations is perpendicular to the given equation?

（A） （B） （C） （D） y = -10x + 1 （E） y = 10x + 18

**Correct Answer: D**

### More ACT Math Exam Questions

- 1What is the least common multiple of 3, 4a, 5b, and 6ab?
- 2
If , then

*n*! =? - 3
The percent

*P*of a population that has completed 4 years of college is given by the function*P*(*t*) = -0.001*t*^{2}+ 0.4*t*where*t*represents time, in years. What percent of the population have completed four years of college after 20 years, to the nearest tenth? - 4Antoine bought a new electric guitar that cost $588.60 after 9% sales tax was added. What was the price of the guitar without tax?
- 5In the figure below, m ∠WYZ = 28° and bisects ∠ZYX. Which of the following is the measure of ∠XYM?