Seudónimo Seudónimo

23-05-2017
Mathematics

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The expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. If the length is Fraction 2 over 7 unit and the width is Fraction 3 over 7 unit, what is the perimeter of the rectangle in units?

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teetee200975 teetee200975

25-05-2017

1.42857 = 1.43 should be the answer

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apologiabiology apologiabiology

25-05-2017

P=2(L+W)
L=2/7
W=3/7

remember that (a/b)+(c/b)=(a+c)/(b)

P=2(2/7+3/7)
P=2((2+3)/7)
P=2(5/7)
P=(2/1)(5/7)
P=10/7
perimiter is 10/7 units

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