Cathy ran for 30 minutes at a rate of 5.5 mi/h. then she ran for 15 minutes at a rate of 6mi/h. how many miles did she run in all ?

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.