I need help! what is the answer to this

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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.