Find the value of x. mean is 0; 11.5, 12.5, -10, -7.5, x

X = -6.5 because you make the equation; 0 = (11.5 + 12.5 + -10 + -7.5 + x)/5 and then you add up the top and get 0 = (6.5 + x)/5 then multiply by 5 and you get 0 = 6.5 + x then you subtract 6.5 and you get x = 6.5

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

4038 is the answer lol just use a calculator