Question

Which of the following is a solution of the compound inequality -1 < 2n + 1 < 5?

Answer 1

1. -1 < n < 5

2. n > 2 or n < -1

3. -1 < n < 2

4. n < -2 or n > 4

Answer 2

I'll get you started

-1 < 2n + 1 < 5

-1-1 < 2n + 1-1 < 5-1 ... Subtract 1 from all sides.

-2 < 2n + 0 < 4

-2 < 2n < 4

Answer 3

okaay, and then what? @jim_thompson5910

Answer 4

well you want to get n all by itself

Answer 5

how do you do that

Answer 6

no clue :/

Answer 7

2n means 2 times n

Answer 8

how do we undo the "2 times" part

Answer 9

divide?

Answer 10

by what

Answer 11

2?

Answer 12

so you divide all sides by 2 to get

Answer 13

-2 < 2n < 4


-2/2 < 2n/2 < 4/2


-1 < 1n/1 < 2


-1 < 1n < 2


-1 < n < 2

Answer 14

ohhh wow, thx!

Answer 15

yw