Patty's pies made 2 peach pies using 10 cups of peaches. They made 3 pies using 15 cups of peaches and 4 pies using 20 cups of peaches. Predict how many cups of peaches would be needed to make 9 peach pies. Explain.

So each pie=5 cups of peaches so lets count up to nine 5=25 | 6=30 | 7=35 | 8=40 | and finally 9=45 ... so nine pies needs 45 cups of peaches

First, we need to know how many cups are in one peach pie.

We can do this by taking 10 divided by 2.

10 / 2 = 5

So, every peach, there are 5 cups in that pie.

We want to know how many cups of peach are going to be in 9 peach pies. Just multiply.

5 * 9 = 45

45 is your answer.