Mateo and Kristen want to know the combines number of arcade games they played today. They both played 4 games for a dollar, but Mateo also won 5 free games. Kristen says the combined number is 4M + 5 + 4k, where
Mis the number of dollars Mateo spent and K s the number of dollars she spent. Mateo says the cobined
amount is 5(M+K) +4. Who is right and why? (Explain)