Solve the problem.Suppose that P(x) represents the percentage of income spent on food in year x and I(x) represents income in year x. Determine a function F that represents total food expenditures in year x.
A. F(x) = (P + I)(x)
B. F(x) = (P ? I)(x)
C. F(x) = (I - P)(x)
D. F(x) = (
)(x)
Answer: B
Mathematics
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Solve the problem.Write an iterated triple integral in the order 
for the volume of the region in the first octant enclosed by the cylinder 
and the plane 
.
A. 
B. 
C. 
D. 
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Divide, if possible. If a quotient is undefined, state so.68 ÷ (-68)
A. 
B. 1
C. -1
D. 0
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Combine like terms, if possible.4t + 4 - 4t
A. 4 B. 8t C. 8t + 4 D. -8t + 4
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Perform the indicated operations and simplify the result. Leave the numerator and denominator in your answer in factored form.
A. x - 7
B. x + 7
C. 
D. 
Mathematics