To determine the total amount of pizza left, we can add up the amounts from each type of pizza.
- Cheese pizza: 1 whole pizza = 1
- Pepperoni pizza: 1 whole pizza = 1
- Sausage pizza: 1 whole pizza = 1
- Veggie pizza: Original was cut into 5 pieces, and 2 pieces are left, so that is \( \frac{2}{5} \) of a pizza.
Now, we add them all together:
\[ 1 + 1 + 1 + \frac{2}{5} = 3 + \frac{2}{5} \]
This can be expressed as the mixed number \( 3 \frac{2}{5} \).
Thus, the mixed number that represents the amount of pizza that is left is 3 2/5.