Solve with work avaliable

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.

How do i solve uniform motion problems?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x