Gregg K. answered • 12/21/16
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Subtract r from both sides
-5 >5r+10
Subtract 10 from both sides
-15 > 5r
Divide both sides by 5
-3>r
or
r<-3
Gregg K.
tutor
Thats what I have
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12/21/16
Kenneth S.
Gregg wrote:
-15 > 5r
Divide both sides by 5
-3<r NG, say I. HE SHOULD NOT HAVE REVERSE DIRECTION OF THE INEQUALITY!!
-15 > 5r
Divide both sides by 5
-3<r NG, say I. HE SHOULD NOT HAVE REVERSE DIRECTION OF THE INEQUALITY!!
r < -3 is the answer. You can read if from right to left, in which case it says "-3 IS GREATER THAN r.
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12/21/16
Gregg K.
tutor
If you subtract 6r from both sides and add 5 to both sides we will have
-5r >15
If we divide by -5 on both sides
We get r<-3
As long as I remember to switch the direction of the sign when dividing by a negative I avoided this in my original post by keeping the coefficient of r positive
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12/21/16
Kenneth S.
Gregg, you messed up, and you have not made amends!
Originally, had the wrong answer because you reversed direction even though you divided by a positive number.
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12/21/16
Gregg K.
tutor
I answered 2 different ways and both of my answers are r<-3
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12/21/16
Andrew M.
Unless Gregg edited his post from the original way it was input...
There is NO ERROR in his answer. -3>r is the same as r<-3.
He put it both ways and, as he stated, since he left the r positive
by subtracting 10 from both sides ... There was no need to switch
the inequality when dividing by 5.... Which He Didn't.
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12/22/16
Lucy X.
12/21/16