Simplify the expression. Write the answer with only positive exponents. Assume that all variables represent nonzero real numbers.(b-7)(b-3)

A.
B.
C. b10
D. b21


Answer: B

Mathematics

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A. {2}
B.
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D.

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A. {(-1, -6)} B. {(-2, -5)} C. no solution; ? D. {(-1, -5)}

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Plot the point.(4, -135°)

A.

B.

C.

D.

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Find the product and write the answer in simplest form. Assume variables represent nonnegative values. ? 

A. 10
B. 5
C. 5
D. 10

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