Which of the following numbers can be expressed as repeating decimals? 4 over 7, 2 over 5, 7 over 8, 4 over 9

7 over 8 and 4 over 9
4 over 7 and 2 over 5
4 over 7 and 4 over 9
2 over 5 and 7 over 8

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Average acceleration: i have no idea how to do this.

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