The horizontal beams are what I like to think of as "rail road tracks". The metal portion of the tracks anyway. Notice how angle 2 and angle 8 are inside the tracks, so we consider them "interior angles"
Furthermore, they are on opposite or alternate sides of the transversal line. The transversal line is the non-parallel line that cuts through the "rail road tracks".
Put those two facts together and we get "alternate interior angles" as our final answer
why don't you just search it up instead of doing it here when it takes time for someone to answer the question
1. y= -1/2x + 5/2
2.y= 2x-15
(f+g) means add the expressions together. combine like terms.
there is no other constant term so the -4 stays as is.
