ACT Math Practice Question #1427 (Medium (32)) | Test Citadel
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ACT Math Difficulty: Medium (32)

Digital ACT Math Practice Question #1427

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Suppose y varies directly as the square of x and inversely as z. If y = 18 when x = 3 and z = 4, what is the value of y when x = 5 and z = 10?
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k = 18*4/9 = 8. New y = 8*25/10 = 20.

Masterclass Solution & Distractor Trap Analysis

18 = k(9)/4 -> k = 8. y = 8(25)/10 = 200/10 = 20....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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