Abag contains 5 blue, 8 red, and 7 green marbles. a marble is selected at random. find the probability the marble is not red

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.