Page 120 Solving twostep inequalities

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Page 120 Solving two-step inequalities

• Solve two-step inequalities
• Use two-step inequalities to solve problems

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Example

• Undoing operations Solve and graph 7g11gt67
• 7g11gt67
• 7g11 -11 gt67 -11
• 7ggt56
• 7ggt56
• ggt8

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Example

• 2. Reversing the inequality symbol

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Solve 6 lt - r - 6
3
2
6 6lt - r 6 6
3
2
12 lt - r
3
2
-3
-3
(12) lt (- r)
3
2
2
-18 gt r, or r lt -18
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Ca Standards check

• 1. Solve and graph

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-10 lt x - 6
2
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Ca Standards check

• 2. Solve and graph -2m4 lt 34

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Example

• 3. Using two step inequalities Dale has 25 to
  spend at a carnival. If the admission to the
  carnival is 4 and the rides cost 1.50 each,
  what is the greatest number of rides Dale can go
  on?
• 4 admission 1.50/ride number of rides is
  less than or equal to 25

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CA Standards Check

• 3. A stereo salesperson earns a salary of 1,290
  per month, plus a commission of 4 of sales. The
  salesperson wants to maintain a monthly income of
  at least 2,200. How much must the salesperson
  sell each month?

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Homework