Michael can spend a maximum of $234 on office supplies. each ream of paper costs $6. each ink cartridge costs $18. which of the following graphs represents the possible combinations of paper and ink cartridges that he may buy?

There is no graph in your question. If p is number of reams of paper, and c is number of ink cartridges, then

3p + c = 234, wich p and c natural numbers (including 0)

This means that 13 ink cartridges and 0 paper will satisfy the end amount, but also 0 ink cartridges and 39 paper. There are 14 combinations possible.

31 is prime. and it’s prime factorization is just 31.