sophieelks1 sophieelks1

21-03-2021
Mathematics

contestada

F is directly proportional to A. if F=72 when A=9 find F when A=7

Respuesta :

21-03-2021

56 is your answer.

Equation for direct proportion is y = kx where k is the constant of proportionality. For your letters, it’s f = ka

We know 72 =k9, so k = 8
Then they want you to solve
f = 8•7
f = 56

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