Answer:
35 dollars
Step-by-step explanation:
Start by finding the unit price of each cup.
If 3 cups = 7 dollars, then 1 cup must equal 7/3 dollars.
If we assign the variable x for cups and the variable y for dollars, we are left with 3x = 7y, and finding the value of x would lead to 7/3y, or 7/3 dollars per cup.
Next, we have 15 cups. So, if each of the 15 cups cost 7/3 dollars, then we can multiply 15 and 7/3 to get 35 dollars total.
An alternative way of doing this is by recognizing the ratio between 15 cups and 3 cups, so you can multiply 3 cups by 5 to get 15 cups and 7 dollars by 5 to get 35 dollars.
Hope this helps!
