What do i put on the blank spots that have parenthesis and a plus sign in the middle? its number 15 that's talking about 56 and 77

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Use the expression below.–4b + 8c + 12 – 8b – 2c + 6part asimplify the expression. enter your answers in the boxes. b + c + part bfactor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3)part cwhat is the value of the expression when b = 2 and c = –3? enter your answer in the box.

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)