Answer:
Width = 40 meters
Length = 167 meters
Step-by-step explanation:
Let
Width of the pool = x meters
Then
Length of the pool = 4x + 7 meters
and
Perimeter
meters
Hence,

Answer:
The vertex is the point (-1,2)
Step-by-step explanation:
we have

Convert into vertex form
Group terms that contain the same variable, and move the constant to the opposite side of the equation

Complete the square. Remember to balance the equation by adding the same constants to each side.


Rewrite as perfect squares

----> equation in vertex form
The vertex is the point (-1,2)
Gaining $25 rather than losing it
The constant of proportionality stays the same no matter what values the variables take, so in our example independently of the cost of the item (and of the tax value, which is dependent on the cost value).
Here the only value that does not change is the 0.007, the rate! - this is the correct answer.