Answer:
Step-by-step explanation:
Key to this method is remembering that

So, if you divide the coefficient of x by 2 and square it, that will complete the square. With that in mind, things are easy.
6/2 = 3, so add 

So, c=9
Similarly, for the other two,

You don't really have to worry about the sign, since squaring will always make it positive

Answer:
7/4 or 1.75
Step-by-step explanation:
Assuming this is a linear function, you can use the slope formula of change in y-values divided by change in x-values. Take your y-values (8 - 1), which is seven. Then take your x-values (6-2), which is equal to 4. Then your slope is just 7/4 or 1.75.
Answer:
There were 120 yellow water bottles in the shipment
Explanation:
Multiply 400 by 30% to find out how many water bottles came in yellow.
400 • .30 = 120
So, 120 were yellow.