If y varies jointly as w and x, and y is 483 when x is 742 and w is 383, find y when x is 274 and w is 756.

Answer 1

y = kwx

First, find k. Do this by plugging in x,w,y:

483 = k*742*383 so
k = 0.0016995

Now, knowing k, find y:

y = 0.0016995 * 274 * 756
y = 352