Question

Paul expects to sell four out of every five brownies he bakes. He thinks, 'I will only sell four out of five brownies, so I need to bake more brownies than I want to sell. I want to earn $10 in total. I need to know how many brownies to bake.' Can you complete Paul's explanation and solve the problem? How many brownies should Paul bake to earn $10 in total?

Answer 1

Paul should bake 7 brownies to earn $10 in total.

Explanation:

Let's assume the cost of each brownie is $2. Now we can calculate the number of brownies Paul should bake to earn $10 in total.

Using the equation we derived earlier:

(number of brownies) = $12.50 / x

Substituting the value of x ($2) into the equation:

(number of brownies) = $12.50 / $2 = 6.25

Since we cannot bake a fraction of a brownie, we need to round up to the nearest whole number.

Therefore,

Paul should bake 7 brownies to earn $10 in total.