Mathematics
14 Online
OpenStudy (anonymous):
-2y - 7 > 11
Part 1: Solve the inequality above.
Part 2: Describe the graph of the solution.
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OpenStudy (michele_laino):
please add 7 to both sides of your inequality
OpenStudy (anonymous):
y>-9
OpenStudy (michele_laino):
@hislightningbug812 are you sure?
OpenStudy (anonymous):
5y > 18?
OpenStudy (michele_laino):
no, sorry @RedBlade127
-2y-7+7>11+7
so?
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OpenStudy (anonymous):
ohhh
OpenStudy (anonymous):
you add 7 to both sides then divide both sides by -2
OpenStudy (anonymous):
-2y - 14 > 18?
OpenStudy (michele_laino):
please note that -7+7=0, so?
OpenStudy (anonymous):
damn
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OpenStudy (anonymous):
-2y-7
would be -2y
OpenStudy (michele_laino):
@RedBlade127 please retry!
OpenStudy (anonymous):
-2y >18?
OpenStudy (anonymous):
y>-9 as i said before
OpenStudy (michele_laino):
that's right!, now divide both sides by 2
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OpenStudy (anonymous):
now divide both sides by -2
OpenStudy (anonymous):
no u need to divide by -2
OpenStudy (anonymous):
-2y - 7 > 11 implies -2y>11+7 implies 2y<-(11+7) implies y<-9
OpenStudy (michele_laino):
@RedBlade127 please write your answer
OpenStudy (anonymous):
uhh, I'm so confused...
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OpenStudy (michele_laino):
please you have to perform this calculus:
\[\frac{ -2y }{ 2 }>\frac{ 18 }{ 2 }\]
OpenStudy (anonymous):
what are your options
OpenStudy (anonymous):
@RedBlade127 remember a golden rule, whenever you multiply or divide an inequality by negative number, the sign of the inequality changes
OpenStudy (anonymous):
answer is y<-9
OpenStudy (anonymous):
thats true i forgot so y<-9 thats your answer
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OpenStudy (anonymous):
Ohh, Thanks Prince and everyone.
OpenStudy (michele_laino):
@RedBlade127 thanks!