Question

The equation y = −40x + 380 represents the number of miles y a hybrid car can still travel after using x gallons of gas. How many gallons of gas does the car's tank hold?

Answer 1

`9.5\ gal`

Explanation:

Let

y -----> the number of miles

x ----> the number of gallons of gas

we have

`y=-40x+380`

Find out the x-intercept

The x-intercept is the number of gallons that the car's tank hold

The x-intercept is the value of x when the value of y is equal to zero

For y=0

`0=-40x+380`

`40x=380`

`x=380/40`

`x=9.5\ gal`