Half a pepperoni pizza plus three fourths of a ham and pineapple pizza contains 765 calories 1/4 of a pepperoni pizza plus a whole ham and pineapple pizza contains 745 calories how many calories are in a whole pepperoni pizza and how many calories are in a whole ham and pineapple pizza a) 600 calories, 550 caloriesb) 480 calories, 640 calories c) 520 calories, 680 caloriesd) 660 calories, 580 calories

Correct choice is D (In a whole pepperoni pizza are 660 calories, in  in a whole ham and pineapple pizza are 580 calories).

Step-by-step explanation:

Let x calories be the number of calories a whole pepperoni pizza contains and y calories be the number of calories a whole ham and pineapple pizza contains.

1. If half a pepperoni pizza plus three fourths of a ham and pineapple pizza contains 765 calories, then

2. If 1/4 of a pepperoni pizza plus a whole ham and pineapple pizza contains 745 calories. then

3. Multiply each equation by 4 and get a system of two equations:

From the second equation , then

Then