Question

it is given that X varies inversely with Y and x = 9 when Y = 21 equal to 21 find the value of x and y is=7

Answer 1

Answer:

x=27

Step-by-step explanation:

X varies inversely with Y. This means: X α 1/Y

Thus, XY = K

We are given that when X = 9, Y = 21.

Hence, XY = 21*9 = 189

When Y = 7

X * 7 = 189

X = 189/7

X = 27

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