Question

The function for the cost of materials to make a muffin is f(x) = Three fourths x + 3, where x is the number of muffins. The function for the selling price of those muffins is g(f(x)), where g(x) = 3x + 4. Find the selling price of 20 muffins.

Answer 1

We are given with two functions: f(x) = 3/4 x + 3 and g(x) = 3x + 4. The selling price is g(f(x)). Hence this is equal to 3(3/4x +3) + 4. This is equivalent to 9/4 x + 9 +4 or 9/4 x + 13. Substituting 20, the selling price is 59 units. The answer is 59 units or curriencies