Question

Braden has r red peppers and 10 green peppers. Write an expression that shows how many peppers Braden has.

Answer 1

The amount of peppers Braden has is red peppers + green peppers

Braden has r red peppers
He also has 10 green peppers
P stands for the amount of peppers he has in all

So you equation will look like
P = r + 10
For the expression, you do not need to have P, because it doesn't specify for you to 'know' what the total amount is. So your answer is r + 10 

hope this helps