Someone please help:)

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?