Erin is buying pizza for 12 people. She estimates that each person will eat 3 slices of pizza. Erin also knows that each pizza will cost $15.25 and will be cut into 8 slices. Which expression can be used to calculate the amount of money Erin needs for pizza?

Total cost= 15.25*[(12*3)/8]

Step-by-step explanation:

The expression would be:

Total cost= 15.25*[(12*3)/8]

Prove:

Number of slices= 12 people*3 slices

Number of slices= 36

Number fo pizzas= number of slices/8

Number of pizzas= 36/8

Number of pizzas= 4.5 = 5 pizzas

Now, the total cost:

Total cost= number of pizzas*unitary cost

Total cost= 5*15.25

Total cost= $76.25

first we need to find the hypotenuse by using a^2 + b^2 = c^2 (where c is the hypotenuse and a and b are the other sides)

8^2 + 5^2 = 64 + 25 = 89, so c = sqrt89.

cosine is adjacent over hypotenuse: 8/sqrt89

rationalize the fraction: (8*sqrt89)/89

the answer is C.