SAT Math Multiple Choice Practice Question 167: Answer and Explanation

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Question: 167

13. Find n if

A. 2
B. 14
C. 20
D. 44
E. 620

Correct Answer: D


D. You probably realized that you need to square both sides, but did you remember to isolate the radical first? You need to add 3 to both sides before squaring, giving you . Now when you square both sides, you get n + 5 = 49, so n = 44.

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