Solve by completing the square.n2 = 8n - 15

A. 5
B. 5, 3
C. -5, -3
D. no real-number solution


Answer: B

Mathematics

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Evaluate the expression.

A. 2
B. -12
C. -64
D.
E.

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Use scientific notation and the properties of exponents to help you perform the following operation. Express the answer in ordinary decimal notation.(0.006)(110,000) 

A. 6600 B. 660 C. 11.6 D. 7100 E. 710

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Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by  where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?

A. 20 watches B. 36 watches C. 73 watches D. 39 watches

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Evaluate.-40

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

Mathematics