Respuesta :

Answer: A

Explanation:

The equation representing thiis scenario is expressed as

x + 30y = 450

where

x represents the number of miles

y represents the remaining gallon of gas in the tank.

From the equation, we would subtract x from both sides, it becomes

x - x + 30y = - x + 450

30y = - x + 450

Dividing through both sides by 30, it becomes

30y = - x/30 + 450/30

y = - x/30 + 15

On the !st of february when the gas was put in th tank, the number of miles is zero. Substituting x = 0 into the equation, it becomes

y = - 0/30 + 15

y = 15

Thus, number of gallons of gas that Alex put in his tank on 1st of February is 15