Answer:
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The lcm of 120 and 20 is 120!
20 = 2 x 2 x 5
120 = 2 x 2 x 2 x 3 x 5
LCM = 2 x 2 x 2 x 3 x 5
7abc and 8abc-8 are the answers.
Answer:

Step-by-step explanation:
So we want to simplify:

Note that this is in the format:

And we know that this is the same as:

Let 2√5 be a and let √3 be b. Thus:

Simplify:

And this cannot be simplified any further.
Answer: The second one
Step-by-step explanation:it's the second one because the line goes strait through the orign