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Mathematics 13 Online
OpenStudy (anonymous):

Last Question.... The lengths of two sides of a triangle are given. Describe the possible lengths for the third side. X+7>11 X+11>7 7+11>X

OpenStudy (anonymous):

|dw:1355901700761:dw| $$x+7>11\\x>4\\\ \\7+11>x\\18>x\\x<18$$The intersection of these inequalities is the possible side-lengths (note I didn't include \(x+11>7\) since that boils down to \(x>-4\) which is included in the first inequality), i.e. \(4 < x < 18\).

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