PLEASE HELP FAST! in the coordinate plane shown, point C(not shown) lies on segment AB, if the ratio of the length of segment AC to the length of segment CB is 3:1, what is the y coordinate of point C?

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