Question

At a carnival, hamburgers cost $4 while hot dogs cost $2. Becky has to buy 18 items for her students. She spent a total of $48. How many hamburgers did she buy?

Answer 1

6 hamburgers

Explanation:

Step 1. We figure out how much it would have cost if Becky only bought hamburgers.

18 x $4 = $72

Step 2. We find the difference between the actual price she paid, and the answer above.

$72 - $48 = $24

Step 3. We find the difference between the two different foods she could have bought (hamburgers or hot dogs).

$4 - $2 = $2

Step 4. We divide the answer to step 2 by the answer to step 3.

$24 / $2 = 12

(This is the number of hot dogs - or the cheaper item)

Step 5. We subtract the answer to step 4 from the total number of items that Becky bought.

18 - 12 = 6

(This is the number of hamburgers - or the more expensive item)

Step 6. We check our answer.

12 hot dogs = 12 x $2 = $24

6 hamburgers = 6 x $4 = $24

Total = $24 + $24 = $48

Hope this helps! :)