Write a proportion for each. Then solve

Josie figures it would take a gallon and a half to paint one side of the house. If the four sides are approximately equal, how much paint would it take to paint all four sides?

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