If triangle pqr is similar to triangle stu, find m

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

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Using elimination, what is -4x+2y=-12 4x+8y=-24