Answer:
12 units
Step-by-step explanation:
Because the two triangles are similar:

Hope this helps!
I can't tell what the numbers are on the first one but you got the second one right, and the last one would be different it would be 24 I believe.
The tenths place is right after the decimal point. So, 3160.9903 can be 3160.9.
80 degrees. 145 = (4x+5) + (6x-10) = 10x-5... so 10x = 150, x = 15. LMN = 6x-10 = 6(15) - 10 = 80.
if you don't have a Unit Circle yet, this is a good time to get one, you can find many online, check maybe in yahoo images, or google images.
Check the picture below.
notice the section encircled in purple.