Answer:
Part A: To find the cost of a meal for a family of four between $50 and $100, we need to pick a number within that range. Let's assume that the meal costs $75. If the family has a 20% off coupon, we need to multiply the cost of the meal by 20% to find the discount. This gives us $75 * 20% = $15. Therefore, the new price of the meal after the discount is $75 - $15 = $60.
Part B: To calculate a 20% tip using the new price, we need to multiply the new price by 20%. This gives us $60 * 20% = $12. Therefore, the final cost of the meal with the tip included is $60 + $12 = $72.
Explanation: