What is the ratio of 1:6 and 3:8

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.

Can someone me do math because i am having a breakdown rn because i don’t get it

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?