If we add the second equation to the first equation, we have a new equation: 7c + 8p = 29.60. Explain why the same (c, p) pair that is a solution to the two original equations is also a solution to this new equation

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.