PSAT Math Multiple-Choice Question 746: Answer and Explanation
Question: 746
How many solution(s) does this system of equations have?
m + 2n = 1
6n + 3m = 9
- A. None
- B. 1
- C. 2
- D. 3
Correct Answer: A
Explanation:
(A) m + 2n = 1 and 6n + 3m = 9 are parallel lines that will not intersect since they have the same slopes and different y-intercepts. Since they never intersect, they have no common solutions.
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