Homework Help: Algebra 2(check) cont..

Posted by erin on Saturday, July 21, 2007 at 11:34pm.

1)solve the inequality -3(r-11)+15>_9 my answer = r<_13

2)solve the inequality -2<4z+10<_12 my answer = -3<z<_1/2

3)solve the inequality 2x-5<_10 or 33-4x<5 my answer is x<_15/2 or <7

4)solve the inequality 3(absolute bars m-4)>6 my answer is m<1 or m>7

5)solve the inequality (absolute bars 3w-7)<_2 my answer = w<_3

in #1 your second last line would be
-3x ≤ -39 so
x ≥ 13 , remember that you have to reverse the inequality sign when multiplying or dividing by a negative.

#2 is good
#3 same error as in #1, you forgot to change the inequality sign
answer should be x≤15/2 or x>7

#4:
3│m-4│ > 6
│m-4│ > 2
m-4 > 2 OR -m+4 > 2
m > 6 OR -m > -2
m > 6 OR m < 2

for #5 I got

w ≤ 3 AND x ≥ 5/3 , see if you can obtain that same result.

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