Verify the identity of cot (x minus pi divided by two) = -tan x

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.

What properties allow transformation to be used as a problem solving tool

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2