Which rule describes the composition of transformations that
maps ABCD to AB"C"D"?

Can someone be awesome and me with : (

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.

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30