Apainter charges $15.92 per hour, plus an additional amount for the supplies. if he made $175.72 on a job where he worked 6 hours, how much did the supplies cost?

Pls , the question is in the picture!

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second