SAT Math Multiple Choice Practice Question 509: Answer and Explanation
8. If and x > y > 0, then which of the following is equal to ?
A. x + y
B. x – y
Correct Answer: D
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, , which equals . 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.