Question

Mary bath 14 gallons of gasoline at $1.19 a gallon and 3 gallons of oil at $2.25 per gallon how much did she spend?

Answer 1

Mary bought 14 gallons of gasoline at $1.19 a gallon and 3 gallons of oil at $2.25 per gallon how much did she spend?

To find how much Mary spent, simply multiply the total cost per gallon with the total amount of gallons spent.

Let's start off with: Mary bought 14 gallons of gasoline at $1.19 a gallon

Gallons bought x price per gallon = total amount of money spent on the gallons

14 (gallons) x $1.19 (per gallon) = $16.66 (total cost of 14 gallons)

Next step, Mary buys 3 gallons of oil at $2.25 per gallon, we do the exact same steps above.

Gallons bought x price per gallon = total amount of money spent on the gallons

3 (gallons) x $2.25 (per gallon) = $6.75 (total cost of 3 gallons)

Now, be sure to remember those 2 number (I've bolded it for you so you could see how to get it and where it is if you need to go back and look at the problem)

Now, we want to find the total amount in dollars Mary had spent on gasoline. Simply add the two total cost of gallons (14 gallons + 3 gallons solution)

Remember the bolded parts? Those come in handy right about now: simply add them together.

$16.66 (total cost of 14 gallons) + $6.75 (total cost of 3 gallons) = $23.41 (total amount of money Mary spent on gasoline)

Answer 2

Hey there Jovenah :)

So to solve this problem, you would need to find how much 14 gallons of gasoline would cost and how much 3 gallons of oil would cost. To do this, you can make two equations for the gasoline and the oil.

You are already given the amount of money it would cost for one gallon of gasoline and for one gallon of oil, so all you need to do is multiply the number of gallons that Mary is going to buy by the price for each gallon of gasoline or oil.

Number of gallons Mary is going to buy:

You are given that Mary will buy 14 gallons of gasoline and 3 gallons of oil. You are also given that each gallon of gasoline is sold at $1.19 per gallon and each gallon of oil is sold at $2.25 per gallon. Now you can create two equations with this given information.

Your two equations should look like:

14g and 3o, where g is gallons of gasoline and o is gallons of oil. Knowing the price per gallon of gasoline and oil, you can plug them in for g and o.

You can plug $1.19 for g (price per gallon of gasoline) and $2.25 for o (price per gallon of oil). Now your equations should look like:

14($1.19) and 3($2.25); now you can multiply the numbers and find out how much Mary spent for the gallons of gasoline and the oil.

14 × $1.19 = $16.66

3 × $2.25 = $6.75

After solving the two equations, you can now see that Mary spent $16.66 on 14 gallons of gasoline and $6.75 on 3 gallons of oil. To find out the total amount of how much Mary spent, add the amounts that she spent for the gasoline and oil.

$16.66 + $6.75 = $23.41

You can now see that Mary spent a total of $23.41 on 14 gallons of gasoline and 3 gallons of oil. Your answer to this problem is $23.41.

Hope this helped you! :)