Im having trouble on some of these pls help 1. 72% of days is 18 days
2.If the sales tax in a town is 5% and Amanda pays $10 in tax on her purchase what was the cost of the item?
3.If 7 out of 25 students have a pet, what percent of the class has a pet?

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.

fd

step-by-step explanation: