The train at an amusement park is a scale model of a full size train. A measure of 0.15 meter on the train at the amusement park represents 1 meter on the full size train. The train at the amusement park is 21 meters long what is the length of the full size train in meters

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.