Solve.A cyclist biked uphill 15 mi at a speed r mph and then returned (downhill) at three times the speed. How long did the whole trip take? Write the answer as a single rational expression.
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer: A
Mathematics
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If possible, use the graph to evaluate the expression.f(-1)
A. -5 B. -4 C. -3 D. -2
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Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero real numbers.
A. 36
B. 
C. 6
D. 96
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Write fraction notation for the given decimal notation. Do not simplify.-0.174
A. - 
B. - 
C. - 
D. - 
Mathematics
Simplify the complex fraction.
A. 
B. 
C. 8
D. 
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