Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
8. Solving Inequalities
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Exercise 1 Page 396

Substitute 9 into the given inequality and then simplify.

No

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We can determine whether 9 is a solution by substituting it into the inequality and simplifying.
n+4 > 15
9 + 4 ? > 15
13>15 *
Since 13 is not greater than 15, we got a false statement. This means that n=9 is not a solution of the inequality.