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Q: X varies directly with y and inversely with z x equals 125 when y equals 5 and z equals 4 Find x when y equals 4 and z equals 5?

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1

m = 24

x = 24

80

290

3

y is 12

25

The answer is x=10. If: x=20 y=8 z=4 then: y=8/2=4 z=4*2=8 since x varies directly with y, meaning whatever happens to y, happens to x, so if y was divided by 2, then x should be divided by 2. After all, the inverse of division is multiplication.

y=(320 x 25 )/ 40 = 200.

57

40

y = -5

4x= y

y = 10x

Find an equation of variation where y varies directly as x. One pair of values is y = 80 when x = 40

xy = is a constant (k) so k = -360. When y = - 36, x = 10

-6/y=5/-2 5y=12 y=12/5

y = 8

What is y? Fx varies with x, but y could be anything.

xy = K so K = 21

Since r varies directly with s, we have r = ks (replace k with 5 and s with 7) r = (5)(7) r = 35

y = 3x y = 3*19 = 57

mensos yo no me la seee

35