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2 July, 16:36

Solve the inequality:

8 - 2x <4

A. X> - 2. B. X>2. C. X6

|x-8| >22

A. X> - 30 or x< - 14

B. X> 30 or x< 14

C. X> 30 or x < 14

D. X> 30 and x < 14

|x+5| < 4

A. - 9 B. - 5 < x <4

C. - 1 < x <4

D. - 1 < x <9

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Answers (1)
  1. 2 July, 16:41
    0
    8 - 2x 2

    |x-8| >22 gives us (-inf, - 14) and (30, inf)

    |x+5| < 4 gives us (-9,-1)

    Step-by-step explanation:

    Inequalities differs from equalities in that they return a range of values for x and not a single value (case of equalities)

    The first one

    8 - 2x <4 if you subtract every side 8, you will get - 2x<-4

    Next divide every side with - 2, since its a negative number you have to change the orientation of the inequaiity, thus we have x>4/2, x>2

    The second

    |x-8| >22, it has to be treated as this. - 22>x-2>22 which can be treated as two single inequalities, - 22>x-8, and the other, x-8>22. The fist gives you x30, two non intercepting ranges, so your range will be (-inf, - 14) and (30, inf)

    The third

    |x+5| < 4 if you apply the same steps from above, you will have the following - 4
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