Concert these from mixed numbers to improper fractions 3 2/5 2 1/6

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Ineed to know the answer to this algebra question.

Can anyone explain to me how to do this? anything will .