In a certain function, y varies directly with x. If y = 6 when x = 8, find x when y = 9.
1 answer:
Y=6, x=8
6/8=0.75
0.75x=y
we can use this solve for x when y=9
0.75x=9
divided both sides by 0.75
x=12
so when y=9, x=12
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