Answer: u should have at least i gallon per person per day
Hi,
i worked out the problem and I attached the picture
Answer: B data gathering
Step-by-step explanation:
all of those examples are examples of gathering data
4b+21=-3b+21+7b
4b+21=4b+21
it means that the expression shows an identity
Answer:
13
Step-by-step explanation:
subtract 2 by 15 to get 13
k = 13