Does this answer and help me with all subjects?

Question and answers are in the attached picture. you so much in advance.

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.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with