Solve.Find the sum of -69 and 71.
A. -2
B. -140
C. 140
D. 2
Answer: D
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Solve the problem.
The number sequence that corresponds to the figures above is 1, 6, 15, 28, . . . .These are the hexagonal numbers H1, H2, H3, H4, . . . .Use inductive reasoning to find a formula for the nth hexagonal number, Hn.
A. Hn = (n + 1)(2n - 1) B. Hn = n(2n - 1) C. Hn = 2n(n - 1) D. Hn = 5n - 4
Find the specified quartile.The test scores of 19 students are listed below. Find the upper quartile, QU.
A. 81.5 B. 88 C. 81 D. 82
Solve the application.The circle graph shows the fraction of books read by students in grades one through five. What fraction of books was read by students in first and fourth grades combined?
A. 
of books
B. 
of books
C. 
of books
D. 
of books
Solve the problem.Find the volume V of a rectangular box with length 3 yd, width 7 yd, and height 2 yd.
A. V = 18 yd3 B. V = 42 yd3 C. V = 28 yd3 D. V = 147 yd3