SAT Math Multiple Choice Question 28: Answer and Explanation

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Test Information

Question: 28

4. If c = + and x > y > 0, then which of the following is equal to ?

  • A. x + y
  • B. x - y
  • C.
  • D.

Correct Answer: D

Explanation:

D Here's yet another chance to plug in because of the variables in the answer choices. In this case, you have several variables. You should start by plugging in values for x and y, and then work out c. Because x > y > 0, let's say x = 6 and y = 3. Therefore, c = + = + = = . The question asks for the value of, which is the reciprocal of, or 2. This is your target answer. If you plug x = 6 and y = 3 into all of the answer choices, you'll find that only (D) equals 2.

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