I wish i could help but i dont know the answer
Answer:
B 405
(=20*9 + 25*9)
what are the blue-ish dots on your screen? :|
Given:
Number calories in a 6-inch pizza = 640 calories
For the pizza of 6 inch

For the pizza of 12 inch

Number calories in a 6-inch pizza = 640 calories, therefore:

Substitute:

And solve for x:

Now, Estimate the number of calories in one slice of a 12 inch pizza:

Answer: 320 calories