if there were 28 students 2 teachers and 12 invited guests and each pizza can only be divided in ten pieces.how many pizzas will they need to buy to get each person to get three pieces of pizza?

42 * 3 = 126

126/10 = 12.6

It looks like they should buy 13 pizzas.

there is 28 students 2 Teachers and 12 extra guests,

28+2+12=42 People are there

They need 3 pizza slices each.
42*3=126 pizza slices are needed.

A pizza cane only be cut in 10 slices so
126/10=12.6

So u need 13 pizzas

To calculate the number of pizzas needed, we need to determine the total number of people who need to be fed and the number of pieces of pizza each person will receive.

Let's break down the information provided:

- Students: 28
- Teachers: 2
- Invited guests: 12

We need to calculate the total number of people:

Total number of people = Students + Teachers + Invited guests

Total number of people = 28 + 2 + 12 = 42

Next, we need to determine the number of pizza pieces each person will receive. In this case, each person will receive 3 pieces of pizza.

Now, to find the number of pizzas needed, we divide the total number of pizza pieces by the number of pieces each person receives:

Number of pizzas needed = Total number of pizza pieces / Number of pieces per person

Total number of pizza pieces = Total number of people × Number of pieces per person

Total number of pizza pieces = 42 × 3 = 126

Number of pizzas needed = 126 / 10 (since each pizza is divided into ten pieces)

Number of pizzas needed = 12.6

Since we cannot have a fractional number of pizzas, we need to round up to the next whole number. Therefore, they will need to buy 13 pizzas to ensure that each person gets three pieces of pizza.