What is an equation of the line that passes through the points
(
−
7
,
−
7
)
(−7,−7) and
(
−
5
,
−
3
)
(−5,−3)?

y =2x+7

Step-by-step explanation:

Just did it.

Third option.

Step-by-step explanation:

The perimeter of a rectangle can be calculated with this formula:

Where "l" is the lenght and "w" is the width.

We can idenfity in the figure that the width of the pool is:

In order to find the lenght, we can use the Pythagorean Theorem:

Where "a" is the hypotenuse and "b" and "c" are the legs of the right triangle.

In this case, we must solve for one of the legs:

Where:

Substituting values, we get:

Then, the perimeter of the pool is:

Alex will need 13.42 units of tile to surround his pool.