y varies directly as the square root of x but inversely as the square root of z. If y=25 when x=20 and z= 5. Calculate a) the value of y when x= 50 and z = 8 b)the value of z when y= 80 and x=10

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step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0

prime

step-by-step explanation: