4. Use substitution to solve the following system of equations. What is the value of y? 3x + 4y = 36
2x - y = 2
Oy-6
Oy=4
Oy=-6
Oy=.4

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

Idon’t know but you’ll figure it out