What value is equivalent to 3 x 10 - 2(12 - 3 x 3)

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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.

For the equations below which statement is true ?