Answer:
n=0
Step-by-step explanation:
Clear parenthesis w/ distribution:
3(-7n+1)=-21n+3
Move everything over to one side:
6n+3=-21n+3
6n=21n Subtract the 3 on the right.
-15n=0 Subtract the 21.
n=0 Divide the -15.
Answer: a = 
We want to isolate a. Add both sides by 2. Then we get u + 2 = 2a. To get just a, we can divide by 2 to get (u+2)/2.
Hope that helped,
-sirswagger21
4. Yes, line L is parallel to M because they do not intersect, the angles do not matter.
5.
A. 2 and 3 would be Alt. Int. Angles.
B. 2 and 4 are congruent angles.
If you type in calculator on google click the buttons and do 140 divided by 55% but the long way to do a percentage problem is to find 1% of the number you start off with and multiply it by the percentage so in this case 1% of 140 would be 1.4 and multiply that by 55 t
