If = 2 , what is the value of x ?
A. 4
B. 16
C. 16
D. 32
Answer:D
If = 2 , what is the value of x ?
A. 4 B. 16 C. 16 D. 32
Explanation: D Plug in the answers, starting with (B). If x = 16, the left side of the equation is = = 2. Does that equal 2 ? No-it's too small. Choice (C) is ugly to work with, so try (D) next. If it is too big, (C) is your answer. For (D), x = 32, and the left side of the equation becomes = = = 2 . It's a match, so (D) is correct. You could also solve this algebraically. Multiply both sides by 2 to get = 4 . Square both sides to get x = 16 × 2 = 32.