katherinekinsey katherinekinsey
  • 23-04-2021
  • Mathematics
contestada

If y varies directly with x and y = 84 when x = 12, find y when x = 11.

Respuesta :

Leora03
Leora03 Leora03
  • 23-04-2021

Answer:

y= 77

Step-by-step explanation:

Write down the equation for direct proportion.

y= kx, where k is a constant.

Find the value of k.

When x= 12, y= 84,

84= k(12)

12k= 84

k= 84 ÷12

k= 7

Substitute the value of k into the equation.

y= 7x

When x=11,

y= 7(11)

y= 77

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