What is the slope of the line 9x– 3y= 10?
(F) 3
(G) –3
(H) 9
(J) 
(K) 
For all positive a, b, and 
（A）
（B） 
（C） 
（D） 
（E） 
Correct Answer: E
The stem-and-leaf plot below shows the scores for each golfer in a recent tournament at the Lehigh Valley Golf Club. There were 13 golfers participating in the tournament.
(Note: For example, a score of 72 would have a stem value of 7 and a leaf value of 2.) If a score represented in the stem-and-leaf plot is selected randomly, what is the probability that the score selected is exactly 83?
（A）
（B） 
（C） 
（D） 
（E） 
Correct Answer: A
The centers of 3 identically sized circles lie on the diameter of a
larger circle, as shown in the figure below. Each of the 4 circles is
tangent to 2 other circles, as shown. If the circumference of each small
circle is 8π inches, what is the circumference of the largest circle,
in inches?
（A）16π （B） 24π （C） 48π （D） 64π （E） 144π
Correct Answer: B
More ACT Math Exam Questions
- 1
A function f(x) is defined as even if and only if f(x) = f(-x) for all real values of x. Which one of the following graphs represents an even function f(x)?
- 2The sum, S, of an arithmetic sequence with first term x1 is given by
, where n is the number of terms in the sequence. The sum of 5 consecutive terms in a given arithmetic sequence is 145, and x5 is 48. What is the sixth term of this sequence? - 3For all values of θ over which sin θ and cos θ are nonzero,
- 4If the average number of carbon dioxide molecules per cubic inch in a container is 3 × 104 and there are 6 × 108 molecules of carbon dioxide in the container, what is the volume of the container in cubic inches?
- 5
Greg is making a triangular sail for a boat, shaped like a right triangle and shown below.
Sail material costs $8.99 for 150 square feet. If the material can be purchased in any quantity, which of the following is closest to the cost in dollars of the material needed to fill the area of the sail as shown?