35 38 Absolute Value Quiz and Unit 8 Review.notebook April 18, Learning Target 2ab: I can write and solve absolute value equations.

Transcription

1 Unit 8 Quiz #3 Absolute Value Name: Hour: Learning Target 2ab: I can write and solve absolute value equations. Solve each absolute value equation. x + 5 = 3 3 x + 5 = 6 Learning Target 3abc: I can write, solve, and graph absolute value inequalities. Solve and graph each inequality. 7 + x > 9 3x A cereal manufacture puts 31 ounces of cereal in each box. The box can be off by 1.5 ounces. Write an absolute value inequality that displays the acceptable amount of cereal that can be in a box.

2 Unit 8 Review

3 Unit 8 REVIEW Name: Linear Systems inequalities absolute value Hour: LT #1: I can solve systems of linear equations using a table, graph, and equations. Solve each system algebraically. 1. { 2. y = 2x + 5 y = 5x + 23 y = 2x 1 { y = x 7 (, ) (, ) Solve each system by graphing. y = 3x 3 3. { y = 2x + 2 y (, ) 4. y = 2x + 5 { y = x 1 y (, ) x x 5. LT #2: I can identify that a system of linear equations has either no solutions, one solution, or infinitely many solutions. How many solutions are there to the system? If one, then write as a n ordered pair. Show your work! { y = x 5 y = 2 y { { x + 2y = 4 { 6. y = x + 4 y x x solutions? solutions?

4 7. { y 4 = x 4y 12 = 4x y { { 2y = 4x + 2 { 8. 3y + 6x = 3 y x x solutions? solutions? LT #4a: I can write and graph inequalities. Graph the inequality. 9. x < x > b < x < x < x The temperature out side is at least 22 degrees. Write and Graph the inequality. 16. My brothers ages are at least 7 and less than 15. inequality inequality graph graph

5 Write the inequality o o 22. o LT 4bc: I can solve inequalities. 23. a + 7 > a 6 > x x 8 > x 5x < x

6 LT 5a: I can solve absolute value equations x =9 32. x 8 = x 2 = x 3 = x + 6 = 30 LT 5b: I can write, solve and graph absolute value inequalities x + 8 < x x + 5 2x > 10 Review Answers 1. (6, 7) 2. (2, 5) 3. (1, 0) 4. ( 2, 1) 5. 1 solution; (3, 2) 6. 1 solution; ( 4, 0) 7. no solutions 8. infinite solutions t a < x x > x x < x x < a > a > x x < x > x x = 9 or x = 23 or x = 10 or x = 3 or x = 6 or x < 4 and x > x 6 or x x > 5 or x < 15

7 IF Solve the inequality. Check the solution. 1 x 10 > 9 3 You are preheating an oven to 430 F. The measured temperature has an absolute deviation of at most 6 F. Write an inequality. Look at notes on p.33 for formula.

8 Practice p.34 Answers 1. D 2. B x should be filled in between dots, left dot should be open. 5. x B 7. C 8. B 9. B 10. x > 6 or x < x > 9 or x < 13

9 Everything due Tomorrow!!!! (Quiz corrections CW stamps Practice Stamps)

10 Quiz Now. Due Tomorrow -11 CW stamps -11 Practice stamps -Quiz Corrections (3) -systems -inequality -absolute value -Unit 8 Review packet -Test note card -Study study study! Open notes Calculator Show all work

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15 Quiz answer key

16 Attachments multi step inequalities.pdf