Help or else the dog dies >:( no silly answers

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.

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.

Two consecutive negative integers have a product of 30. what are the integers?