Plz help due tomorrow

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.

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Simplify the expression. -2/5(10+15m-20n)