old perimeter = 2(1+3) = 8
since two parallel sides are each 0.5m longer, it adds 1.0m to the perimeter.
2(1.5+3) = 9.0 m
a rectangular mural measures 1 meter by 3 meters. Rebekah creates a new mural that is 0.5 meters longer. what is the perimeter of Rebekah's new mural?
4 answers
It is right
I agree it is right
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