common ratio = a4/a3 = a3/a2
8/a3 = a3/18
(a3)^2 = 8 * 18
(a3)^2 = 144
a3 = 12 or a3 = -12
common ratio = 8/12 or common ratio = 8/(-12)
common ratio = 2/3 or common ratio = -2/3
Answer: 12 or -12
the rate is 9 because it goes up 9
2*(n-55)=3*(n+8.8)
2n-110=3n+26.4
-136.4=n
It is (4*5)+(4*6) because if you do 4x6 it equals 20 then if you do 4x6 it equals 24 :)
