## If the circumference of a circle is inches, how many inches long is its radius?

(A)

(B)

(C)

(D)

(E)

The Correct Answer

The expression x^{2} + 2x - 15 can be written as the product of 2 binomials with integer coefficients. One of the binomials is (x + 5). Which of the following is the other binomial?

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

**Correct Answer: C**

Which of the following is NOT an irrational number?

（A） （B） （C） （D） （E）

**Correct Answer: E**

If a + 3b = 27 and a - 3b = 9, then b = ?

(F) 3(G) 9(H) 14(J) 18(K) 36

**Correct Answer: F**

### More ACT Math Exam Questions

- 1A boat is anchored in a small lake with a rope that is 34 feet long. A wind blows the boat until the rope is taut and the water is 16 feet deep. Measuring across the bottom of the lake, how far has the boat moved from the anchor?
- 2What number can you add to the numerator and denominator of 813 \frac{8}{13} 138 to get 6?
- 3
In the Cartesian plane, a line runs through points (1,-5) and (5,10). Which of the following represents the slope of that line?

- 4There are 32 ounces in a quart. If 2 quarts of milk costs $2.65, what is the cost of milk per ounce, to the nearest cent?
- 5The number of fish, p, a small pond can sustain varies inversely with the square root of the amount of predators, q, in the pond. If a pond with 49 predators can sustain a population of 800 fish, how many fish could a pond with 100 predators sustain?