Please get it right, i done this so many times now, i'm running out of points

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?