Provide an appropriate response.Solve using a system of equations with two unknowns:A man spent $4.56 for 15 stamps. If he bought only $0.20 stamps and $0.33 stamps, how many $0.33 stamps did he buy?
A. 3
B. 12
C. 11
D. 4
Answer: B
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Solve the problem.Suppose that P dollars is invested in a savings account at an annual interest rate i, compounded monthly, for 2 months. The amount A in the account after 2 months is given by 
.Multiply this expression for A.
A. A = 
i2 + 
i + P
B. A = 
i2 + P
C. A = 
i2 + 
i + P
D. A = 
i2 + 
i + P
If the function is one-to-one, list the inverse function by switching coordinates or inputs and outputs.f = {(6, -9), (8, -8), (6, -7), (4, -6)}
A. f-1 = {(-9, 6), (-8, 8), (-7, 6), (-6, 4)} B. not one-to-one C. f-1 = {(-8, -9), (-9, 6), (6, 8), (-8, -7)} D. f-1 = {(-8, -9), (-6, 6), (6, 6), (-8, -7)}
Solve the problem.After a new firm starts in business, it finds that its rate of profits (in hundreds of dollars per year) after t years of operation is given by 
Find the profit in year 6 of the operation.
A. $12,100 B. $21,500 C. $31,200 D. $27,550
Find the equation in standard form of the parabola described.The vertex has coordinates (1, 9), and the focus has coordinates (1, 6).
A. (y - 9)2 = -20(x - 1) B. (x - 1)2 = -12(y - 9) C. (x - 1)2 = 12(y - 9) D. (y - 9)2 = 20(x - 1)