Homework Help: Math

Posted by Amelia on Wednesday, October 17, 2012 at 8:11pm.

The average height of Al, Anne, and Allan is 66 inches. If Arnel is included in the group, their average height becomes 70 inches. How tall is Arnel?

Math - Jennifer, Wednesday, October 17, 2012 at 8:16pm
(66 + 66 + 66 + x) / 4 = 70

Solve for x

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