nenacayetano nenacayetano

20-07-2017
Mathematics

contestada

If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 4.

Respuesta :

choixongdong choixongdong

20-07-2017

y = kx
15 = -3k
k = -5

so if x = 4
y = kx
y = (-5) (4) = - 20

answer

y = -20 when the x = 4.

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