What is the inequality that corresponds to the graph
(A) y > 3x + 2
(B) y ≤ 3x + 2
(C) y ≥ 3x + 2
(D) y < 3x + 2
(E) y < 3x + 2
If the solutions to the equation (x + a)(x + b) = 0 are x = 8 and x = -, then a + b = ?
（A）-13 （B） -12 （C） -6.5 （D） 6.5 （E） 12
Correct Answer: C
Katie notices that the textbooks for her past 3 math courses have the same length and width, but each year's textbook has more pages and weighs more than the previous year's textbook. Katie weighs the textbooks, to the nearest 0.1 ounce, for her past 3 math courses and wonders about the relationship between the number of pages in math textbooks and the weights of those textbooks. She graphs the number of pages and corresponding weights of her 3 math textbooks in the standard (x,y) coordinate plane, as shown below, and discovers a linear relationship among these 3 points. She concludes that the equation of the line that passes through these 3 points is y = 0.1x + 2.2. How much more, in ounces, does a math textbook with 1,056 pages weigh than one with 868 pages?
（A）18.8 （B） 19.8 （C） 54.1 （D） 77.3 （E） 107.8
Correct Answer: A
Which of the following lists contains only prime numbers?
（A）63, 73, and 97 （B） 71, 87, and 91 （C） 73, 89, and 91 （D） 79, 89, and 97 （E） 81, 87, and 97
Correct Answer: D
More ACT Math Exam Questions
- 1 What are the solutions to the equation x2 + 8x + 15 = 0
- 2The 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.) Which of the following is closest to the mean score of all the golfers in the tournament?
A scientist performs an experiment in which she measures four values two times each, with the following results:
For all real values of a and b, the equation |a - b| = 5 can be interpreted as "the positive difference of a and b is 5." What is the positive difference between the 2 solutions for a?
- 5In the figure below, all line segments intersect at right angles, and all measurements are given in inches. What is the perimeter of the figure in inches?