Brianna and luis ave several pairs of athletic shoes. brianna has 4 pairs of athletic shoes, and luis has x pairs of athletic shoes. they have a total of 11 pairs of athletic shoes between the two of them. write an equation to describe this situation.

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