SAT Math Multiple Choice Practice Question 470: Answer and Explanation

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Question: 470

11. If , what is the value of x ?

A. 4
B. 16
C. 16
D. 32
E. 64

Correct Answer: D

Explanation:

D Multiply both sides by 2 to get . Square both sides to get x = 162. Therefore, x = 32. You could also have plugged in the answer choices. For D, put 32 in for x and ask, does ? Then does ? Square both sides to find that it does, so D is correct.

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