Ummmm where is it? I dont see 12
First find the formula which is A(N)=A+(N-1)D then fill in what you know
N=term your looking for
A=first term
D= common diffrence
Once filled in you will get this 18(18)=18+(18-1)-6
then solve to get 324= -84
Your final answer is that the 18th term is -84
Hope I could help
Start by proving to them that the number 0.57 can be converted into a fraction . A whole number can't exactly be put in to a fraction. 0.57 can be converted to 14.25/25. This information means that 0.57 IS a rational number. Hope this convinced them!