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OpenStudy (anonymous):
Find the width of a rectangle if the length is 7cm and perimeter is 35cm. (1 points) 10cm 10.5cm 7.5cm 5cm
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Mehek (mehek14):
ok there are 2 lengths and 2 widths you know the length is 7 what is 7*2
OpenStudy (anonymous):
P = 2l + 2w 35 = 2 times 7 + 2w
OpenStudy (anonymous):
35 = 14 + 2w
Mehek (mehek14):
@WhiteFangIII
OpenStudy (anonymous):
14
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Mehek (mehek14):
now what is 35 - 14
OpenStudy (anonymous):
35 - 14 = 2w
OpenStudy (anonymous):
21 = 2w
OpenStudy (anonymous):
w = 21/2
OpenStudy (anonymous):
w = 10.5cm
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OpenStudy (anonymous):
35-14=21
Mehek (mehek14):
ok that is the value of 2 widths you only need one so what is 21/2
OpenStudy (anonymous):
10.5
OpenStudy (anonymous):
CORRECT!
Mehek (mehek14):
that is your answer
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