## punkie32 2 years ago Can anyone help me answer these questions? I just really suck at inequalities and don't know how to answer these. Please help? 1.Explain why and when you need to switch the inequality sign when solving an inequality. 2.How can you tell which direction to shade the graph of an inequality? 3.What is the difference between graphing conjunctions and disjunctions? 4.What is one difference between an inequality with one variable and one with two variables? 5.How do “closed and open circles” relate to “dashed and solid lines”?

1. OpenStudier

I'm not going to do all 5. I'm only doing one.

2. punkie32

That's fine. I'll take all the help I can get.

3. OpenStudier

Alright, next time, post one question at at time, not five in a question.

4. OpenStudier

Let's say we have: \[-a>b\]If we rearrange the equation we get: \[0>b-a\]And if we rearrange again we get:\[-b>a\] or \[a<-b\]So, when do swap the inequality? Do you know?

5. punkie32

when it's only a negative

6. punkie32

??

7. OpenStudier

Negative and when we are multiplying and dividing. This is something you just have to memorize.

8. punkie32

thank you

9. precal

|dw:1356903237059:dw|open circle means the number is not include and dashed line means the numbers on the line are not included solid circle means the number is included and solid line means the numbers are included

10. precal

|dw:1356903337452:dw|

11. precal

|dw:1356903359427:dw|3 in not a solution but any number bigger than 3 is (example 3.1, 3.2, 4, 5, 100, etc)

12. precal

|dw:1356903434970:dw|now 3 is also part of the solution

13. precal

|dw:1356903467129:dw|only the area under the dotted line is the solution

14. precal

|dw:1356903509899:dw|now the line is also part of the solution

15. kelliegirl33

16. punkie32

Wow thank you so much!

17. precal

yw