Enter the length ,X of the ramp in inches (no links need answers ASAP)

Simplify the expression. -2/5(10+15m-20n)

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.

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test