z is directly proportional to m. If z = 20 when m = 4 . Calculate ,
a) find a formula for z in terms of m
b) the value of z when m = 7
c) the value of m when z = 55
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z is directly proportional to m. If z = 20 when m = 4 . Calculate ,
a) find a formula for z in terms of m
b) the value of z when m = 7
c) the value of m when z = 55
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