Evaluate the expression, using the given value of the variable. z ÷ 4 – 8z + 2(z – 5) when z = 12 a. –79 b. –74 c. –34 d. 107

At z= 12:

z/4 -8z+ 2(z-5)
= 12/4 -8*12+ 2(12-5)
= 3 -96+ 2*(7)
= -93+ 14
= -79

The correct answer is A. -79~

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

The first one is correct