Final answer:
To determine the cost of each ice cream cone, calculate the total tips Bob receives ($44) and subtract it from his total earnings ($121) to obtain the revenue from selling ice cream cones alone ($77). Then, divide this revenue by the number of cones sold (22), resulting in a cost of $3.50 per ice cream cone.
Step-by-step explanation:
Bob goes to the beach every day with his ice cream cart. On an average day, he sells ice cream cones to 22 people, and each person tips him $2. At the end of an average day, Bob has $121. To find how much each ice cream cone costs, we begin by calculating the total amount earned from tips alone, which is 22 people × $2 per person = $44.
Next, we subtract the total amount earned from tips from the total amount Bob has at the end of the day: $121 - $44 = $77. This $77 is the amount earned from selling the ice cream cones alone.
Since Bob sold 22 ice cream cones, to find the cost of one ice cream cone, we divide $77 by the number of ice cream cones: $77 ÷ 22 cones = $3.50 per ice cream cone.
Therefore, the cost of each ice cream cone is $3.50.