Charlie's..

This week in advanced math we did chapter 13 (i think) review.
we also started to review for our mid - term exam.
To do this we did our old chapter 7 multiple choice test, our old chapter 7 free response test, our old chapter 8 multiple choice test, and our old chapter 8 free response test. Next week we'll do the rest of our old test.
For my blog, though, i"m going to go over chapter 13 stuff.
chapter 13 had to do with sequences and such.
one was arithmetic sequences.
you use the formula:
t*n = t*1 + (n-1) d

example:
#1:
4, 12, 20, 28
t*n = 4 + (n-1) 8
= 4 + 8n -8
= -4 + 8n

#2:
3, 7, 11, 15, 19
t*n = 3 + (n-1) 4
= 3 + 4n-4
= -1 + 4n