Solve for x
x^2+ 6x + 9 = 12

How do i do this using elimination 2x+3y=12 x-y=6

Which is an equation for the nth terms of the sequence 12,15,18,21

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