Question

4, find y when X = 12.
2. If y varies inversely as x and y= 3 when x= 4, find y when
x 6.
3. w varies directly as x and y and inversely as v?and w= 1200 when​

Answer 1

Complete question for 3.

W varies directly us X and Y and in inversely as V² and W= 1200 when X=4, Y=9 and V=6. Find W when X= 3 , Y=12 and V=9.

Answer:

y = 2

W = 533 1/3

Explanation:

y α 1/x

y = k/x

y = 3 ; x = 4

3 = k/4

k = 3*4 ; k = 12

Hence,

y = 12/x

When ; x = 6

y = 12/6

y = 2

3.)

W α XY α 1/V

W = kXY/V²

W= 1200 when X=4, Y=9 and V=6

1200 = k*4*9 / 6²

1200 = 36k / 36

k = 1200

W = 1200XY/V²

W when X= 3 , Y=12 and V=9

W = (1200*3*12) / 9²

W = 43200 / 81

W = 533 1/3