Solve 3-²

I need work shown​

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.