I need help plz

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

15/16 as a decimal rounded to the nearest hundredth

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)