Ineed to find x but i don't know how

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.

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.