Determine whether the given function is one-to-one. If so, find a formula for the inverse.f(x) = 
A. f-1(x) = (x - 8)2
B. f-1(x) = x2 + 8, x ? 0
C. f-1(x) = 
D. Not a one-to-one function
Answer: B
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Perform the indicated operation and write the answer in lowest terms. 
÷ 
? 
A. 
B. 
C. 
D. 
Solve the problem.Helen Weller invested $11,000 in an account that pays 12% simple interest. How much additional money must be invested in an account that pays 15% simple interest so that the average return on the two investments amounts to 13%?
A. $7000 B. $8000 C. $5500 D. $11,000
Ralph has budgeted $175 for entertainment. He uses this money to go out on dates for $35 or to go out with his friends for $15. Which budget line equation represents the situation?
A. 35x - 15y = 180 B. 35x + 15y = 180 C. (3x + 5y) = 180 D. 180 - (35x + 15y)
Find the function value. If it is undefined, say so. tan 1080°
A. Undefined B. 0 C. 1 D. -1