helpthemmilks helpthemmilks

11-06-2018
Mathematics

contestada

Given the system of equations, what is the y-coordinate of the solution?
5x - 4y = 7 x = 5 - 3/2 y

A.) 36/7

B.) 36/23

C.) 18/23

Respuesta :

11-06-2018

If you plug in the second equation (x=5-3/2y) into the first, you get:

5(5-3/2y) - 4y = 7

Simplify:

25 - 15/2y - 4y = 7
-15/2 y - 8/2 y = 7-25
23/2 y = 18
y = 18 * 2/23 = 36/23

answer B!

Answer Link

briancrowlclass briancrowlclass

12-06-2018

5(5-3/2y) - 4y = 7

Simplify:

25 - 15/2y - 4y = 7
-15/2 y - 8/2 y = 7-25
23/2 y = 18
y = 18 * 2/23 = 36/23

Answer Link

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