Question

Nora took 8 bottles of water to a picnic. Of those bottles of water, she and her friends opened a certain number of bottles. b. What expression can be used to determine the number of unopened bottles at the end of the picnic?

A .8 + b

B. b + 8


C 8 - b


D. b - 8

Answer 1

8 - b

8 is the total amount of bottles that they started out with.
b is the amount that Nora and her friends drank.

b cannot be greater than 8, since 8 is the limit

C. 8 - b is your answer

hope this helps