Step-by-step explanation:
n2+5=21
n2 =21-5
n2 = 16
n =16/2=8
Answer:
Where is the table cant help unless shown
Step-by-step explanation:
The graph of a quadratic equation is a U-shaped curved called parabola. It is because the parabola makes very easy to find the axis of symmetry to plot selected points and finding the roots and vertex.
Good luck :)
Answer: 
Step-by-step explanation:
It is important to remember the following:

In this case you can observe in the figure that "x" is an Angle formed by two chords, therefore, you can find its value applying the formula.
Therefore, the value of "x" is this:


You then would eliminate 6, by adding 6 to both sides

Then you want all of the X's on the same side, so you subtract 2x from both sides.

Then to isolate the X, you divide by 2

The answer is x=2