Question

x varies directly as y and x =
80 when y is 100. What is y when x is 64?​

Answer 1

Answer:

80

Step-by-step explanation:

x:y=4:5

hence

y= 5/4(64)

80

Answer 2

Since X is directly proportional to Y.

Then,

X=mY.

If

X=80; Y=100; Then m=8/10

If

X=64; m=8/10

Then,

Y=X/m=80.

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