If y varies directly as x, write a general formula to describe the variation.y = 9 when x = 
A. y = x + 
B. y = 
x
C. y = 
x
D. y = 45x
Answer: D
Mathematics
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Solve the problem.Mari drops a ball from a height of 21 meters and notices that on each bounce the ball returns to about 
of its previous height. About how far will ball travel before it comes to rest?
A. 52.5 m B. 126 m C. 105 m D. 63 m
Mathematics
Perform the indicated operation.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics
Use even and odd properties of the trigonometric functions to find the exact value of the expression.cot 
A. 
B. -
C. 
D. - 
Mathematics
Solve the inequality graphically, numerically, or symbolically, and express the solution in interval notation. Where appropriate, round to the nearest tenth. ?b - 2? + 1 > 18
A. (-?, -21) ? (15, ?) B. (-15), (19) C. (-?, -15) ? (19, ?) D. (-?, -15) ? (21, ?)
Mathematics