SOLUTION: Absolute value of(2x+5) is less than or equal to 3. /2x+5/<=3 I set it up according to the rule /ax+b/<=c then -c<=ax-b<=c so -3<=2x+5<=3 -5 -5 -5 -8<=2x<=-

Question 54300: Absolute value of(2x+5) is less than or equal to 3.
/2x+5/<=3
I set it up according to the rule /ax+b/<=c then -c<=ax-b<=c
so
-3<=2x+5<=3
-5 -5 -5
-8<=2x<=-2
-4<=x<=-1
Interval notation would be [-4,-1]
However, my teacher's answer sheet to the review problem shows -4 or in interval notation (-4,-1]
why would -4 be less than and not less than or equal to x?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You are correct. The answer in the answer book is probably
a typing error.
Cheers,
Stan H.
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