Answer:
9b+1
Step-by-step explanation:
combine like terms
7b-1b+3b=9b
Answer:
135 degrees
Step-by-step explanation:
135 degrees form the interior angle of a regular octagon
Answer:
10 days.
Step-by-step explanation:
to find what you multiply from 400 to get to 4000, you divide 4000 by 400, which is 10, plug that in, 400 pounds x 10 days = 4000 pounds.