McGraw Hill Glencoe Algebra 1, 2012
MH
McGraw Hill Glencoe Algebra 1, 2012 View details
Standardized Test Practice

Exercise 12 Page 331

Try to rewrite this inequality as a compound inequality.

2

Practice makes perfect
We are asked to find the solution set for all possible values of x in the given inequality.. |x-4| < 2 To do this, we will create a compound inequality by removing the absolute value. In this case, the solution set is any number less than 2 away from the midpoint in the positive direction and any number less than 2 away from the midpoint in the negative direction. Absolute Value Inequality:& |x-4| < 2 Compound Inequality:& - 2< x-4 < 2

This compound inequality means that the distance between x and 4 is greater than - 2 and less than 2. x-4 < 2 and x-4 >-2 Let's isolate a in both of these cases.

Case 1

x-4<2
x<6
This inequality tells us that all values less than 6 will satisfy the inequality.

Case 2

x-4>- 2
x>2
This inequality tells us that all values greater than 2 will satisfy the inequality.

Solution Set

The solution to this type of compound inequality is the overlap of the solution sets. Let's recombine our cases back into one compound inequality. First Solution Set:& x < 6 Second Solution Set:& 2< x Intersecting Solution Set:& 2 < x < 6