i need to turn this in, in 10 minutes

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.

Measure a and b and find their sum. how are the angles related?

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question