Atote bag costs $5 and books cost $3.50 each. you spend a total of $19 before taxes. how many books did you buy in addition to th tote bag?

You bought 4 books in addition to the tote bag.

Explanation

Suppose, the number of books you bought was  

Each book costs $3.50

So, the total cost of number of books will be:  

Given that, the tote bag costs $5 and you spend a total of $19 before taxes. So, the equation will be.....

So, you bought 4 books in addition to the tote bag.

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.