Math - Linear Equations

A car gets 21 mi/gal in city driving and 28 mi/gal highway driving. If 18 gal of gas are used in traveling 448 mi, how many miles were driven in the city, how many driven on the highway (assuming that only the given rates of usage were actually used)?

  1. 👍
  2. 👎
  3. 👁
  1. A car gets 21 mi/gal in city driving and 28 mi/gal highway driving. If 18 gal of gas are used in traveling 448 mi, how many miles were driven in the city, how many driven on the highway (assuming that only the given rates of usage were actually used)?

    H = highway gallons and C = city gallons.
    Then,
    H + C = 18 and

    21C + 28H = 448.

    I suspect you can take it from here.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘C. How many grams of this gasoline would fill a 13.2 gal tank (1US gal=3.78L)?

  2. Chemistry, mathematics, science

    When 1.0g of gasoline burns, it releases 11 kcal. The density of gasoline is 0.74 g/mL. a. How many megajoules are released when 1.0 gal of gasoline burns? b. If a television requires 150 kJ/h to run, how many hours can the

  3. Physics

    Assume it takes 6.00 minutes to fill a 45.0 gal gasoline tank. (1 U.S. gal = 231 in.3) I don't know how to solve for part C. (a) Calculate the rate at which the tank is filled in gallons per second. ANSWER: 0.125 (b) Calculate the

  4. Chemistry

    The level of water in a rectangular swimming pool needs to be lowered 4.00 inches. If the pool is 36.50 ft long and 15.00 ft wide, and the water is siphoned out at a rate of 5.0 gal/min, how long will the siphoning take? 1 ft^3 =

  1. Math

    The Specific weight of water is 62.4 lb/ft^3. Assuming 7.48 gal/ft^3, determine the weight of 1 gal of water?

  2. algebra

    Find a formula for the amount A of CO2 a car produces in terms of the number n of miles driven and the gas mileage G mi/gal of the car

  3. Chemistry

    1) In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 21.0 mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi

  4. Algebra

    2. Convert 2 liters to gallons Use the fact that 1 gal. ≈ 3.8 L a. 22 L ≈ 3.2 gal. (I think it's this one) b. 22 L ≈ 5.8 gal. c. 22 L ≈ 8.4 gal. d. 22 L ≈ 83.6 gal. I'm a bit confused

  1. Math

    A car travels 480 miles on 15 gallons of gasoline. How many miles does the car travel per gallon? My work Myself shows the answer is 32 mi/gal

  2. chemistry

    Ethanol (C2H5OH) and gasoline (assumed to be all octane, C8H18) are both used as automobile fuel. If gasoline is selling for $1.45/gal, what would the price of ethanol have to be in order to provide the same amount of heat per

  3. algebra

    car averages 20 miles per gallon of gas in city driving and 30 miles per gallon in highway driving. At these rates, how many gallons of gas will the car use on a 300-mile trip if 4/5 of the trip is highway driving and the rest is

  4. chemistry

    A small storage tank for liquefied petroleum gas (LPG) appears to be spherical and have a diameter of about 1 ft.Suppose that some common volumes for LPG tanks are 1 gal, 2 gal,5 gal, and 10 gal. Which is the most probable voume

You can view more similar questions or ask a new question.