Question

9n-10>-82 and -1-2n> (or equal to)-5 solve and graph the solution

Answer 1

Okay, and your attempt at this problem?

Answer 2

Let's just say I need a ton of help

Answer 3

Since these only have one variable, are we solving each individually and then graphing each of them?

Answer 4

Correct and I have no clue how to do so

Answer 5

Take the first one, 9n-10>-82, treat this as you would any other algebraic problem. How would you isolate n?

Answer 6

Add 82 to both sides

Answer 7

Not the way I would start but okay, so you have 9n+72>0, now what? And remember you want 'n' all alone.

Answer 8

Aw so it'll take longer if I add 82 so let's try adding 10 to both sides

Answer 9

Okay, so you now have 9n>-72, what's next?

Answer 10

I would divide by 9

Answer 11

So n> than ?

Answer 12

7

Answer 13

In the last problem you proved that 9*7 was 63.

Answer 14

I meant 8

Answer 15

Okay, and you have a -72

Answer 16

So what's next

Answer 17

Well first you need to recognize that if 9*8=72, then 9*(-8)=-72 and so your answer is n>(-8)

Answer 18

That's it

Answer 19

What this tells you is that the statement, 9n-10>-82, is true for all values of n>(-8)

Answer 20

So when you graph this you will start with a circle around -8, because it is values > and not >=, and that your line will extend to all values that are greater than -8.

Answer 21

Alright thanks man you've been a great help

Answer 22

One more question is it an open or a closed circle

Answer 23

You're welcome. Though you now need to do the same process for your -1-2n>= -5

Answer 24

What does the closed circle represent?

Answer 25

The answer is included on the graph

Answer 26

I guess I should have asked if you were doing shading as well.

Answer 27

So to include something, we would have to had that as an answer in the inequality. We showed that n > -8, and so it is no included in the answer.

Answer 28

Some textbooks have a solid dot indicate inclusion, some have a full circle indicate above and below but not the exact value, and some have a half circle show that it is only from one side.

Answer 29

So for the -8 it's a closed circle correct

Answer 30

I would draw it like this, because we are only interested in values greater:

Answer 31

But look at the examples your book gives and adjust your answer to match the lesson they have.

Answer 32

Alright will do

Answer 33

Good luck.