It z varies jointy as x and y and z = 3, when x = 7 , and y = 9, then find x when z = 5 and y = 13.
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It z varies jointy as x and y and z = 3, when x = 7 , and y = 9, then find x when z = 5 and y = 13.
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z = kxy
3 = k(7)(9)
3/63 = k63/63
21 = k
To find x:
x = 21(5)(13)
x = 21(65)
x = 1,365