How do I write two equivalent expressions that represent the rectangular array with 3, 2a, and 5

Mathematics
Tutor: None Selected Time limit: 1 Day

Write two equivalent expression that represent the rectangular array below

       2a 5

3            

            

            e

Oct 25th, 2015

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Length = 2a + 5

Width = 3


First expression is the area of the rectangle = length x width = 3(2a + 5)

Expand it using distributive property=> a(b + c) = ab + ac

3(2a + 5) = 3x2a + 3x5 = 6a + 15 

is the second equivalent expression.


ANSWER: 3(2a + 5) and 6a + 15 


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Oct 25th, 2015

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