McGraw Hill Glencoe Algebra 1, 2012
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McGraw Hill Glencoe Algebra 1, 2012 View details
6. Graphing Inequalities in Two Variables
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Exercise 60 Page 322

Since the word between the inequalities is or, we are looking for the union of the solution sets to the individual inequalities.

{ n | n is a real number }

Practice makes perfect

To solve the compound inequality, we have to solve each of the inequalities separately. Since the word between the individual inequalities is or, the solution set for the compound inequality is the union of the individual solutions.

First Inequality

Inequalities can be solved in the same way as equations, by performing inverse operations on both sides until the variable is isolated. The only difference is that when you divide or multiply by a negative number, you must reverse the inequality sign.
0.5n≥-7
n≥-14

All possible values of n that are greater than or equal to -14 will satisfy the inequality.

Second Inequality

Once more, we will solve the inequality by isolating the variable.
2.5n+2≤9
2.5n≤7
n≤7/2.5
n≤2.8
The second inequality is satisfied for all values of n less than or equal to 2.8.

Compound Inequality

The solution to the compound inequality is the combination of the solution sets. First Solution Set:& - 14 ≤ n Second Solution Set:& n ≤ 2.8 Combined Solution Set:& - 14 ≤ norn ≤ 2.8 Note, that all real numbers are part of the solution set.