Digital PSAT Math Practice Question 172: Answer and Explanation
Question: 172
What is the product of xy given the system of equations below?
- A.
- B.
- C. 12
- D. 15
Correct Answer: B
Explanation:
(B) Solve for x and y by using substitution:
Substitute 
in for x to solve for y: 
Then, multiply x and y to solve for their product: 
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