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18.01.2020 •
Mathematics
The width of a rectangle is represented by 5 + 2y the lingth is twice as long as the width.what is the perimeter of the rectangle? select all correct expressions
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Ответ:
30+12y
Step-by-step explanation:
width=5+2y
length is twice its width
so 2(5+2y)=10+4y
perimeter=L+W+L+W
=2(L+W)
Therefore 2(5+2y+10+4y)
10+4y+20+8y
collect the like terms together
10+20+4y+8y
30+12y
so the answer=30+8y
Ответ: