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If “y varies directly as x” and y= 8 when x=2, what is the value of x when y= 40?

Sagot :

Answer:

If “y varies directly as x” and y= 8 when x=2, what is the value of x when y= 40

y=kx

8=k(2)

k=8/2

k=4

x=y/k

x=40/4

x=10