Q: Jack is running a bake sale to help pay for his basketball team's uniforms. He's already sold 4 brownies for $3 each and 5 lemon squares for $2 each. If Jack's goal is to make $50 and he sells cookies for $4 each, how many cookies does he need to sell to reach his goal?
A: 7
Explain how we arrive at this answer:
Explanation: Jack earned from the brownies $3 per brownie * 4 brownies = $12. Jack earned from the lemon squares $2 per square * 5 squares = $10. He still needs to earn $50 - $12 - $10 = $28. He sells cookies for $4 each, so Jack still needs to sell $28 / $4 = 7 cookies.