With method please or just the answer would be fine

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

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.