HEl On a given section of railway, the speed of a passenger train is 30 km / h higher than that of a freight train. At what speed (in kilometers per hour) does a passenger train run if it travels 39 km in the same time as 27 km of freight?

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.