Twice the difference of a number and six equal seven

2 *(n-6) = 7

n = 19/2 or 9 1/2

Step-by-step explanation:

Twice the difference of a number and six equal seven

2 *(n-6) = 7

distribute

2n-2*6 =7

2n -12 =7

add 12 to each side

2n = 19

divide by 2

n = 19/2

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.