**Answer:**

They are the same amount of pizza.

**Step-by-step explanation:**

Stella cut her pizza into 4 pieces. If she eats 2 pieces, then she has eaten half of her pizza. Likewise, Brian cut his pizza into 8 pieces. If he eats 4 pieces, then he has eaten half of his pizza. Therefore, they have both eaten the same amount of pizza.

Model:

**Answer:**

3/5

**Step-by-step explanation:**

4 black marbles, 5 red marbles, and 1 blue marble = 10 marbles

P( red or blue) = number of red or blue marbles / total

= 5+1/ 10

=6/10

=3/5

**Answer:**

28 minutes

**Step-by-step explanation:**

500 ÷ 18 = 27.77777777777778

Round the 27.7 to 28.

**Answer:**

it is subtract 5

**Step-by-step explanation:**