Please help show work please I beg

A 1
B 28
C7
D 14

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Triangle knm is what is true about the sides of knm

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?