Final answer:
The best equation for Gary to determine the number of pencils in each cup is d) Cups=24÷4, since he needs to divide the total number of pencils (24) by the number of cups (4).
Step-by-step explanation:
The equation that would best help Gary determine how many pencils are in each cup is d) Cups=24÷4. This is because he has a total of 24 pencils that are evenly divided into 4 cups. To find out how many pencils per cup, you would divide the total number of pencils by the number of cups.
Here is the step-by-step explanation: Gary wants to know how many pencils are in each of the 4 cups. Since the pencils are evenly distributed, we take the total number of pencils, which is 24, and divide it by the number of cups, which is 4.
The correct mathematical operation here is division because we are splitting a total into equal parts. Therefore, the equation Gary should use is: Cups = 24 ÷ 4.