Solve the inequality. Express your answer in set notation.x2 > 1
A. {x| -1 ? x ? 1}
B. {x| x ? -1 or x ? 1}
C. {x| x < -1 or x ? 1}
D. {x| x < -1 or x > 1}
Answer: D
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What is the sine of angle é?
a. c/b
b. b/c
c. a/c
d. a/b
e. b/a
Solve for y.7x + 9 = 5y - 9
A. y = 
B. y = 
C. y = 7x - 18
D. y = 7x + 18
Decide if the answer is reasonable or unreasonable by rounding the numbers and estimating the answer. If the answer is not reasonable, find the correct answer.36.9 ÷ 4 = 92.25
A. Unreasonable, should be 0.9225 B. Reasonable C. Unreasonable, should be 0.09225 D. Unreasonable, should be 9.225
Solve.The figure shows the graphs of the cost and revenue functions for a company that manufactures and sells binoculars. 
At the break-even point both cost and revenue are what?
A. $750 B. $2700 C. $2250 D. $1500