Over the weekend brady and jack drove to key west to go scuba diving now they're preparing to go home friday needs gas for his jeep which gets 21 miles per gallon for gas mileage when he stopped at the gas station he already has 5 gallons of gas in his tank he buys more gas for a $1.40 per gallon at freddy spends $19. 50 on gas what is the total distance the boys could travel round if necessary to the nearest tenth

13.9 gallons was what he purchased along with his initial 5 gallons which sums up to a total of 18.9 gallons at 21 mpg is 396.9 miles. 396.9 miles are capable of being covered on this tank of gas!

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18