What is the value of the expression? y=6 z=2 3y-z y+5z. a)1 b)3 c)4 b)16

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.

Is this a polynomial function? i need to know asap

Ineed no it anyone can see this