What is the lcm and gcf of 36 and 45

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

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.

How do you use the elimination method for this question? explain, because i really want to understand!