You are purchasing a new car. in order to determine which car will provide maximum savings, you’ve researched miles per gallon (mpg) ratings of cars. if gas is $3.45 per gallon and you drive an average of 18,000 miles per year, the following rational equation is given:
g(x)= 3.45 (18,000/old miles per gallon)-3.45(18,000/new miles per gallon)
in the formula what do you find when you divide 18,000/old miles per gallon?

defines the gallons of the gas consumed by the old car in one year.

Step-by-step explanation:

If I purchase a car, I will definitely concentrate on a factor that is gas consumed by the car in a year.

As per statement given in the question if gas is $3.45 per gallon and I drive an average of 18000 miles per year.

If x miles per gallons is the average of the old car and y miles per gallons is the average of of new car.

Then total difference in gallons of the gas consumed by the old and new cars will be represented by the equation.

g(x) = 3.45 - 3.45

Here, defines total number of gallons of the gas consumed by the old car in one year.

i am unable to solve this problem

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15