Equivalent ratios

x y
6 9
? 12
10 15

what number is missing from the table of equivalent ratios?
a) 4
b) 6
c) 8
d) 9

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

Which expression is equivalent to -5(3x - 6/7)

Can someone answer this question for me