Luke saw 7 birds at the bird feeder some more birds flew over. now there are 15 birds at the bird feeder. how many flew over?

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.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

If the value of cos330°is√3/2 then find cos 165°.