Answer:
b
Explanation:
Have the cookies as x and the cupcakes as y. From there, we know that she bought a total of 42 goodies, meaning that x + y=42. From there we know the cost of 1 cookie, and 1 cupcake. Being that a cookie costs .50, and a cupcake .85, we can conclude that the next equation is .5x+.85y= 27.30 because that is the total she spent BEOFRE tax.