The function f is one-to-one. Find its inverse.f(x) = 4x
A. f-1(x) = -4x
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = 4x
Answer: B
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Decide whether the expression is or is not an identity.cot2 
= 
A. Identity B. Not an identity
Solve the problem.At one point the exchange equation for converting American dollars into Japanese yen was Y = 129(d - 4) where d is the number of American dollars, Y is the number of yen, and $4 is a one-time bank fee charged for currency conversions. Use this equation to solve the following problem.Ariel is traveling to Japan for 3 weeks and has been advised to have between 19,000 and 30,000 yen for spending money for each week he is there. Write an inequality that represents the number of American dollars he will need to bring to the bank to exchange money for this 3-week period.
A. $441.89 ? d ? $697.71 B. $445.86 ? d ? $701.67 C. $441.95 ? d ? $697.77 D. $453.86 ? d ? $709.67
Write an equation to describe the situation.Mike is on vacation in Costa Rica. He has a budget of $910 for accommodation. He will stay as long as his budget allows. The more expensive hotel costs $66 per night and the budget hotel costs $43 per night. He plans to stay 7 more nights in the budget hotel than in the expensive hotel. Find the number of nights n that he will stay at the expensive hotel.
A. 43(n + 7) + 66 = 910n B. 43(n + 7) + 66n = 910 C. 43(n - 7) + 66n = 910 D. 43n + 66(n + 7) = 910
Use synthetic division to find the quotient and the remainder.x4 + 16 is divided by x - 2
A. x3 + 2x2 + 4x + 8; remainder 16 B. x3 - 2x2 + 4x - 8; remainder 32 C. x3 + 2x2 + 4x + 8; remainder 0 D. x3 + 2x2 + 4x + 8; remainder 32