Mateo 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 the combined amount is 5(m k) 4. who is right? why?

The correct answer would be 4k+4m+5. K represents the amount of dollars spent by Kristen. k is multiplied by 4 because Kristen can play 4 games for each dollar spent. m represents the amount of dollars spent by Mateo. m is multiplied by 4 because Mateo can play 4 games for each dollar spent. The 5 represents the 5 games that Mateo won. That is the basis for how many games they've played. The have to have played at least 5 games because that is how many games Mateo won. I believe Kristen would be right, but I can't be sure because you did not insert any operation signs into your equation.