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1. z varies jointly as x and y and z = 48 when x = 6 and y = 8.
2 q varies directly as r and inversely as u,and q=8 when r=32 and u=4​

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Answer:

1. z varies jointly as x and y and z = 48 when x = 6 and y = 8.

z= kxy

48=k(6)(8)

48=k48

k=48/48

k=1

2 q varies directly as r and inversely as u,and q=8 when r=32 and u=4

q=kr/u

8=k(32)/4

k32=(8)(4)

k=32/32

k=1

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