Answers to Unit 2 Test

1. B 2. A 3. C 4. A 5. D 6. B 7. D 8. A 9. D 10. B

11. x = -4 12. x = -16 13. x = -1 14. 8 messages 15. 1 month 16. 17. 18. 59º 19. x = -27/5 or -

5.4 20. 28 feet 21. 4 2/7 or 30/7

35

3 xm

33

2 xy

Graphing Inequalities

The Solution of An Inequality is…

Any value of the variable that makes the inequality true

It is easier to understand the solution once it is graphed on a number line

MUST be written as a complete mathematical sentence (x > 5 rather than just 5)

Inequality Symbols

> means greater than > means greater than or equal to < means less than < means less than or equal to means not equal to

4 5 6

x > 5

Graphing Greater Than

Use an open circle Shade to the right Put an arrow at the end of the

shading

4 5 6

x > 5

Graphing Greater Than or Equal

Use a colored in circle Shade to the right Put an arrow at the end of the

shading

4 5 6

x < 5

Graphing Less Than

Use an open circle Shade to the left Put an arrow at the end of the

shading

4 5 6

x < 5

Graphing Less Than or Equal To

Use a colored in circle Shade to the left Put an arrow at the end of the

shading

Graphing Not Equal To

Use an open circle Shade both directions Put an arrow at the both ends of the

shading

4 5 6

x 5

Graphing Equal To

Use a colored in circle No shading

And now…

Assignment #14 pages 177 – 179 (25 – 53 odd) AND pages 183 – 185 (51 – 83 eoo)

Test corrections are due on Monday, September 26th.

Why? Because that is the NEXT test!