Answer:
Cost of 7 cupcakes will be $17.5
Explanation:
Cost of 4 cupcakes sold = $10
We need to find the cost for 7 cupcakes.
We will use unitary method, if we find cost of 1 cupcake then we can find cost of 7 cupcakes.
Cost of 4 cupcakes sold = $10
Cost of 1 cupcakes sold = $10/4
Cost of 7 cupcakes sold = $10/4*7
= $17.5
So, Cost of 7 cupcakes will be $17.5