Which ratio is equivalent to 3:7? 9:21 12:30 18:28 21:27

What is the value of y? round to the nearest tenth

What is the length of the unknown leg in the right triangle ?

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