The slope is 1... sorry if it’s wrong!! i tried my best
According to Newton's second law of motion, the force acting on an object is equal to the mass multiplied by the acceleration of the moving object. Since the object is moving in a constant velocity, acceleration is zero. Hence regardless of the mass of the car, the force acting is zero provided that air resistance and friction is negligible
Substitute for x in the second equation:-
2(y + 3) + y = 9
2y + 6 + y = 9
3y = 9 - 6 = 3
so y = 3/3 = 1
Now plug this value of y into first eqution:-
x = 1 + 3 = 4
So you answer is x = 4 and y = 1.
You didn't include the options, so whichever one looks like x=(12.53+11.86)3.19 or something similar. You need to add the amount of gallons he bought, then multiply them by the cost per gallon, which will most likely be set equal to a variable.