Answer:
The answer should be 69°
Step-by-step explanation:
Each line is being cut by a transversal, that means that the degree on the other side of it, added with the given degree will add up to 180°
1. On the right, you need to find the interior angle where 160° is outside so you subtract 180° from 160° to find the angle inside. That gives you 20°
2. On the top left you have 131° so 180°-131°=49°
Next you add the angles you have and then subtract it from 180 to get the interior angle with n° outside.
3. 20°+49°=69°
4. 180°-69°=111°
Then you do the same thing as the beginning which would be n°+111°=180°
5. n°+111°=180°, that means n=69°
Hopefully that clears it up for you :)
 
        
             
        
        
        
Area as a function of length can be written as 
f(l) = l^2 
And volume of cube can be expressed as a function of side s as, 
f(s) = s^3
        
             
        
        
        
Obviously, 2013. 2013-2014 (1 year) 2014-2015 (2 years) etc etc
        
             
        
        
        
If you are trying to create a garden of potted plants, you would find out how much soil each pot needs/holds and multiply that by how many pots you plan to use. then you would go to the store for potting soil, which let’s say came in smaller packs and you need to purchase multiple. use multiplication estimation to estimate how many bags you’d need. 
I know this is a dumb example...sorry this is one I remember from my fourth grade math teacher ahah