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Thursday, March 18th

Learn how to solve multi-step inequalities using addition, subtraction, multiplication, and division. Understand the rule for reversing the sign when multiplying or dividing by a negative number. Practice graphing and checking solutions.

williamphoward
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Thursday, March 18th

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  1. Thursday, March 18th Bell Ringer: 3b-1=6b+5

  2. This week Monday: I CAN solve and graph inequalities by addition and subtraction Tuesday: I CAN solve and graph inequalities by multiplication and division Wednesday: I CAN solve and graph two step inequalities Thursday: I CAN solve and graph multistep equations Friday: I CAN solve inequalities using the calculator and complete the exit slip

  3. Today Objective: I CAN solve multi-step inequalities Homework: None

  4. Inequalities vs. Equations We solve inequalities the same way we solved equations We use inverse operations to isolate the variable

  5. Remember the rule from yesterday? Rule: Whenever you multiply or divide both sides of an inequality by a negative number you REVERSE the direction of the sign.

  6. Example #1 Who can remember Variable on both sides from equations? 1. Get all the variables to one side 2. Get all the numbers to the other side

  7. Example #1

  8. Let’s rewrite the solution Sometimes it is easier to have the variable on the left

  9. Graph and Check your solution -19.5 Check: Let n=-20

  10. Example #2

  11. Let’s rewrite the solution Sometimes it is easier to have the variable on the left

  12. Graph and Check your solution -1 Check: Let n=-2

  13. Example #3 Whenever you reach a false statement, there is NO SOLUTION

  14. No solution Can be written as:

  15. Rest of class • Pick up where you left off yesterday: card A, Card B, card C…. If you finished, write your own inequality word problem that will be on the next TEST

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