Question

Check the picture. I really need help. Thank you.

Answer 1

z=-4.5 , MC=21

Explanation:

AC=AM+MC

42=3-4x+3-4x ( since M is the mid point then AM=MC=3-4x)

42=6-8x

42-6=-8x

-8x=36

x=-36/8

x=-4.5

AM=MC=3-4x

MC=3-4(-4.5)= 3+18=21

MC=21