This is a Fibonacci sequence:
6, 7, 13, 20, 33, 53, 86, 139, 225, ...
2 the answer is two I put it in the calculator
First you subtract (1/4) from each side to get C by itself, then you convert (4/4) into 1. Then you divide both sides by (-4) to get C to equal 1. So your final answer is C=-1/4
7.5 i believe. not very good at math tho lol
