Please help me with this Which system is the solution of the graph?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25