I think the answer is Graph A
Answer:
When dividing both sides by a negative.
Step-by-step explanation:
When dividing OR multiplying both sides by a negative, we need to flip the inequality signs.
Answer: 
Step-by-step explanation:
Given
Length L=15 feet
width b=2 feet
Volume V=375 cubic feet
Suppose h is the height
Volume is given by 

1/x + 1/y = 8
x + y = 8
6/x + 12/y = 72n
If the question is what I think it is, then it's simple. All you need to do is divide 420 by 15; and you'll get the answer: 28.