Question

Mtateo and Kristen want to know the combined 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 M is the number of dollars Mateo spent, and K is the number of dollars she spent. Mateo says thecombined amount is 5(M + 1) + 4. Who is right?

Answer 1

According to the given data we can be certain that the person that is right sould be Kristen, because They both played 4 games for a dollar so should 4 for her and 4 for him, and only mateo played 5 free games. Therefore indeed the combined number should be represented as 4M + 5 + 4K.