Use the trigonometric substitution u = a tan ?, where 0 < ?< ?/2 and to simplify the expression 
.
?
A. ?- a sec ?
B. ?a sec ?
C. ?a tan ?
D. ?a sin ?
E. ?a csc ?
Answer: B
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Solve the problem.Michael's bank contains only nickels, dimes, and quarters. There are 62 coins in all, valued at $5.15. The number of nickels is 6 short of being three times the sum of the number of dimes and quarters together. How many dimes are in the bank?
A. 8 B. 45 C. 14 D. 9
A nurse earns $31,400 annually and receives a 4% raise in salary. What is the new salary?
A. $34,540 B. $35,400 C. $1256 D. $32,656
Provide an appropriate response.The "marked price" is the price before the sales tax is added.
A. True B. False
Solve the following system by any appropriate method. If there is no real number solution, so state.
- 
= 1x + y = 7
A. (3, 10), (-17, -10) B. (2, 4), (-16, 24) C. (2, 3), (-16, 25) D. (3, 4), (-17, 24)