Final answer:
Kenneth buys 3 yo-yos for $4 each, paying with a $20 bill. The total cost is $12, therefore he receives $8 in change.
Step-by-step explanation:
The question relates to basic arithmetic operations in mathematics, specifically multiplication and subtraction. Kenneth buys 3 yo-yos at a price of $4 each. To find out the total cost for the yo-yos, you multiply the number of yo-yos by the price per yo-yo: 3 yo-yos × $4 per yo-yo = $12.
Kenneth hands over a $20 bill to pay for this purchase. To determine how much change Keneth gets back, you need to subtract the total cost of the yo-yos from the amount he paid with: $20 - $12 = $8. Therefore, Kenneth should receive $8 in change after buying the yo-yos.