Answer:
a. b=4
Step-by-step explanation:

From the attached triangle drawn below:
NL=20, LM=3b, 

Since we are told that:

The correct option is A.
Answer:
im sorry i cant help you without a picture
Step-by-step explanation:
Answer:
<h2>a = 16</h2>
Step-by-step explanation:
Look at the picture.
The formula of an area of a trapezoid is:

- bases
- height
We have:

Substitute:

<em>divide both sides by 8</em>

Answer:
The answer for this question would be 21x (when simplified).
Answer:
You can't get a square root of any number that has a negative sign on the inside of the radical