Question

There is a group of 15 people are ordering pizza. Each person wants 2 slices and each pizza has 10 slices. How many pizzas should they order?

Answer 1

To calculate the number of pizzas, multiply the number of people by slices per person and divide by number of slices per pizza, rounding up to ensure enough slices for everyone.

Step-by-step explanation:

The subject of this question is Mathematics, specifically it involves the topics of multiplication and division within the realm of arithmetic. The student is calculating the number of pizzas needed for a group of 15 people where each person desires 2 slices, and each pizza contains 10 slices. To determine the number of pizzas, we first find the total number of slices required by multiplying the number of people by the number of slices per person: 15 people × 2 slices/person = 30 slices. We then divide the total number of slices by the number of slices per pizza to find the number of pizzas needed: 30 slices ÷ 10 slices/pizza = 3 pizzas. However, since you cannot order a fraction of a pizza, we round up to the nearest whole number, concluding that 4 pizzas should be ordered to ensure enough slices for everyone.

Answer 2

3 pizzas

Step-by-step explanation:

First, we can calculate how many slices are necessary. Each person wants two slices, so for each person, we must add 2 slices. We can add 2 15 times, or multiply 2 by 15 to get 2 * 15 = 30

We now know that we need 30 slices of pizza. Next, we need to figure out how many pizzas we need given this information.

For each pizza, we can add 10 slices, as there are 10 slices of pizza.

For the first pizza, we have 10 slices

For the second, we have 10+10 = 20 slices

For the third, we have 10+10+10 = 10 * 3 = 30 slices. Perfect!

Another way of figuring out the number of pizzas we need would be to divide 30 by 10, and 30/10=3 would equal the number of pizzas. We need to figure out how many pizzas we need to have 30 slices, so we can divide here.