We have the equation

Let's complete the square, to do it let's add and subtract 25 on the right side

Now we can have y in function of x

Now we can already identify the vertex because it's in the vertex form:

Where the vertex is

As we can see, h = 5 and k = -2, then the vertex is

Now we can continue and find the focus, the focus is

We have a = 1/20, therefore

The focus is

And the last one, the directrix, it's

Then

Hence the correct answer is: vertex (5, -2); focus (5, 3); directrix y = -7
Answer:
C
Step-by-step explanation:
Using Pythagoras' identity to determine if the triangle is right
The square of the longest side should equal the sum of the squares on the other 2 sides, that is
QS² = RS² + QR² = 8² + 5² = 64 + 25 = 89 ( take the square root of both sides )
QS = 
Δ QRS is not right as QS would have to be 
Answer:
4 shirts will cost about 25.32
Step-by-step explanation:
First, You can divide 19/3 and this will give you 6.33 repeating.
Next, you will assume that one shirt would cost $6.33.
Finally, Multiply by 4 to get the amount of four shirts.
Answer:
A.
Step-by-step explanation:
In a Parallelogram , the opposite sides are equal as well as parallel, so proving that the opposite sides are equal and parallel will definitely prove it to be a Parallelogram