Answer:

Step-by-step explanation:
Look at the picture.
Use the Pythagorean theorem:

We have:

Substitute:

<em>multiply both sides by 4</em>
<em>subtract 81 from both sides</em>
<em>divide both sides by 4</em>

Answer:ok
Step-by-step explanation:
ok
Answer:

Step-by-step explanation:

X = 2i, -2i (I’m sorry if it does come back as wrong but it’s the only answer I got)
Answer:
B
Step-by-step explanation:
We can get two equations from the inequality:

We just need to simplify both equations to get our answers:


The two answers we get are:

Which is also B.