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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
4. Writing and Graphing Inequalities
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Exercise 31 Page 150

Substitute - 1 into the given inequality and then simplify.

No.

Practice makes perfect
We can determine whether - 1 is a solution by substituting it into the inequality and simplifying.
7 - 2y > 3y + 13
Substitute

y= - 1

1 - 2 ( - 1) ? > 3( - 1) + 13
MultNegNegOnePar

- a(- b)=a* b

1 + 2 ? > 3(- 1) + 13
MultPosNeg

a(- b)=- a * b

1 + 2 ? > - 3 + 13
AddTerms

Add terms

3 > 10 *
Since 3 is not greater than 10, - 1 is not a solution.
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arrow_right Try It p.146-147
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Try It 2 (Page 146)
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Try It 5 (Page 147)
arrow_right Self-Assessment for Concept & Skills p.147
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arrow_right Self-Assessment for Problem Solving p.148
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arrow_right Review & Refresh p.149
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arrow_right Concept, Skills, & Problem Solving p.149-150
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