Which expression represents the phrase "one third the sum of 12 and a number"? a.) 1/3+12+x b.) 1/3(12+x) c.) 1/3x+12 d.) 1/3(12)+x

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work