HELP IM a lil confused

(6-2)180

4(180)= 720 degrees

add all the angles together and you get 595

720-595= 125 degrees (this is what x is)

pretty much the formula at the bottom is to figure out the sum of all interior angles, which is how i got 720.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!