What is the equation for this question?

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.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Ineed the solution to this problem and the steps.