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Question

how to find the mathematical model?

P varies directly as x and inversely as the square

of yP = 28 when x = 42 and y = 12.

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New Doc 2019-11-26 10.42.22_4.jpg

According to questions
y 2
P(y) = K
P = 28 2 = 42, y = 12
but the the value of p ondre
28 = K x42
K = 2842
42 63
=
2/3
K = 2/3
Now
P (c ) = 2 x
P(y) = K
K
2 8 = K
144
K = 4032
Py = 4032
8 2

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