dolphinstar4312
dolphinstar4312
20-11-2016
Mathematics
contestada
5r^2-44r+120=-30+11r
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MohamedSharif
MohamedSharif
20-11-2016
5r^2-44r+120=-30+11
5r^2=25r
25r-44r+120=-30+11
-19r+120=-19
-19r=-19-120
-19r=-139 the divide both sides by -19
r=-7.3
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