178k views
4 votes
Y = 10 when x = - 4 , find y when x = 12

1 Answer

4 votes

Answer:

y = -30

Explanation:

Set the ratio:
(x_1)/(y_1) = (x_2)/(y_2)

Let:


(x_1 , y_1) = (-4 , 10)\\(x_2 , y_2) = (12 , y)\\

Plug in the corresponding terms to the corresponding variables:


(-4)/(10) = (12)/(y)

First, cross multiply.


(-4 * y) = (10 * 12)\\-4y = 10 * 12\\-4y = 120

Next, isolate the variable, y. Divide -4 from both sides of the equation:


(-4y)/(-4) = (120)/(-4)\\y = (120)/(-4)\\y = -30

-30 is your answer for y.

User Josha Inglis
by
8.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.