Va rog ajutati-ma cu exercitiile bifate

Ineed with number 17 i don’t get it at alll

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.

10% of 1,900,000. show me how you got the answer