if y varies directly as x, and y= 7 when x=5, find y when x=-15
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if y varies directly as x, and y= 7 when x=5, find y when x=-15
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Answer:
k = 15
y = 25
Step-by-step explanation:
y = kx
y=15 x=3
15 = k (3)
15 = 3k
15 ÷ 3
k = 5
y= x=5 k=5
y = (5)(5)
y = 25
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