Someone please help... and show work please

x= 12

Step-by-step explanation:

Since 7x-8= the angle above 11x-28, which lays on a 180 degree angle. You get the equation 7x-8+11x-28=180. You combine like terms on the left side and get 18x-36=180 add 36 to both sides and then divide both sides by 18 to get x=12.

C 36

Step-by-step explanation:

1/2(base)(height)

1/2(8)(9)

1/2(72)

=36