Tim, Kim, and Jim collect comic books. Kim has three times as many comic books as Jim. Tim has eight less than Kim. Together they have 104 comic books. How many does each person have?

Ineed with number 17 i don’t get it at alll

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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.