i’m doing homework with my little brother and i have no idea what this means, can someone help, quick?

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

Me asap! what is the slope of this line? enter your answer in the box.

If two parallel lines are cut by a transversal, interior angles on the same side of the transversal are supplementary. a. always b. sometimes c. never