Evaluate the expression.Let x = -8, y = 5. Evaluate 
.
A. 13
B. -13
C. 3
D. -3
Answer: C
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A horse trots in a perfect circle around its trainer at the end of a 20-foot-long rope. How far does the horse travel as it circles the trainer once?
A. 400 ft B. 63 ft C. 1,657 ft D. 126 ft E. 1,257 ft
As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.The sampling proportion is
A. 37
%.
B. 5%.
C. 
%
D. 
%.
E. none of these
Use the determinant feature of a graphing calculator to solve the system by Cramer's rule . (Round to one decimal place.)2.6x - 0.7y + 5.3z - 3.4w = 2.96.5y + 0.7w = -1.84.0z - 2.2w = 1.54.9x + 0.6w = 3.2
A. {(0.5, -0.4, -0.3, -1.3)} B. {(0.5, -0.4, 1.1, 1.3)} C. {(0.5, 0.4, 1.1, -6.3)} D. {(-0.5, -0.4, 1.1, 9.4)}
Simplify.29 + 23 ? 24
A. 691 B. 1248 C. 76 D. 581