Answer:
The steps to doing this are as follows:
1. Identify the unknown and represent it with a variable.
2. Set up an equation or inequality using that variable.
3. Solve the equation or inequality to find an answer to the problem.
Answer: B: diameter
Step-by-step explanation:
The blue line the goes across the shape is called the diameter
Hope this helps ;)
If there is $1,000 for the pipes, then you can buy 5 steel pipes for $500 and to plastic for 500 too.
Your equation

is in the form

The vertex only relies on "a" and "b" though, so that +9 doesn't really matter in this case. The vertex of a parabola is located where

So your x-coordinate is -1. You need to find f(-1) to find your y-coordinate, and then you list it in the form (-1, y).
The answer to this is .15%