Help plz This is so hard l need a big explanation! 20 points and definitely brainiest! Wrong or unexplained answers will be reported! Thxxx!

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Solve 2x+y=3 x+y=5 in substitution method

Consider the function f(x)=-5x+3 what is f(-2)