gustavotristan826 gustavotristan826
  • 13-12-2019
  • Mathematics
contestada

if x varies directly as y, and x=9 when y=6, find x when y=15​

Respuesta :

folarin7
folarin7 folarin7
  • 15-12-2019

Answer:

Step-by-step explanation:

From the law if variation,

x <> y ______(1) ,where <> is known as the constant if proportionality.

x = k/y where k is a constant____(2)

Substitute for the values of x and y to get the k

9 = k/6

Therefore k= 54

To find the value of x, go back to equation 2 and substitute for the values if k and y given and computed.

x = 54/15; reduced to lowest term

x = 18/5

x = 3.6

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