Solve. Use the principle of square roots.(x + 9)2 = 28

A. 2, -2 
B. 2 - 9, 2 + 9
C. -9 + 2, -9 - 2 
D. -9 + 2, -9 - 2 

Answer: D

Mathematics

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A.
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D. (y + 7)(y + 5)

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Find the square.(0.9x - 0.2)2

A. 0.81x2 + 0.36x - 0.04 B. 0.81x2 - 0.36x + 0.04 C. 0.81x2 + 0.04 D. 0.81x2 + 0.36x + 0.04

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Solve.A painting in a museum is 30 centimeters wide. Convert this width to inches. Round answer to the nearest hundredth, if necessary.

A. 11.81 in. B. 76.2 in. C. 9.15 in. D. 98.4 in.

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Solve the system of equations.- x + 4y - 2z = -243x - y + z = 21 x - 3y + 4z = 28

A. (6, -4, 4) B. (6, -6, 3) C. (4, -6, 4) D. (4, -4, 3)

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