What's are you trying to find?
Answer:
4
Step-by-step explanation:
4 is the base of the equation and then as it goes on, you add 2* the point in the sequence -1
Answer:
Factoring
Step-by-step explanation:




and 
First, find a common denominator (the bottom number) Then add the tops as usual. Four and five have a common denominator of 20 so: 8/20+5/20=13/20
1.3n (it can be simplified like any other equation just add like terms and remember there is a one before every variable)