Use the rules for exponents to rewrite the expression and then evaluate the new expression. 

A. 0
B. -12
C. 1
D. -4

Answer: C

Mathematics

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Find the average value of the function f over the given region.f(x, y) = sin 5(x + y) over the square 0 ? x ? , 0 ? y ? .

A. ?2
B. 4?2
C.
D.

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Simplify the expression.-2(6r + 3s) + 7(6r + 10s)

A. -18rs B. 30r + 3s C. 4r + 1s D. 30r + 64s

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Mathematics

Solve the problem.A contractor is considering a sale that promises a profit of $31,000 with a probability of .7 or a loss (due to bad weather, strikes, and such) of $14,000 with a probability of .3. What is the expected profit?

A. $31,500 B. $17,000 C. $21,700 D. $17,500

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Mathematics

Provide an appropriate response.Before fractions may be added or subtracted, they must all have the same:

A. denominator B. dividend C. numerator D. divisor

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Mathematics