the variable x varies directly as y and x:80 wjen y is 160 what is y when x is 64
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we know its direct variation....
so,
80÷160 = 64÷y
by cross multiplication
160×64 = 80×y
10240 = 80×y
10240÷80 = y
128 = y
that's your answer!!!!
so,
80÷160 = 64÷y
by cross multiplication
160×64 = 80×y
10240 = 80×y
10240÷80 = y
128 = y
that's your answer!!!!
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