Complete the square to write the equation in the form 
- 
= 1 or 
- 
= 1. Sketch the graph.16x2 - 16y2 + 160x + 32y + 128 = 0
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: D
Mathematics
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Graph the function.y = -cos ?x
A. 
B. 
C. 
D. 
Mathematics
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(8
+ 5)(9
+ 2)
A. 82
+ 16
B. 226 + 61
C. 98
D. 10 + 72
+ 16
Mathematics
Solve the problem.At what interest rate must $4200 be compounded annually to equal $7521.56 after 10 yr? (Round to the nearest percent.)
A. 7% B. 8% C. 6% D. 5%
Mathematics
Solve the problem.Midtown Antiques has found that sales have decreased 6% from last year. Sales this year are $104,091. Find the amount of last year's sales. Round your answer to the nearest dollar.
A. $110,635 B. $111,735 C. $110,725 D. $110,735
Mathematics