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14-08-2017
Mathematics

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Teh width of a rectangle is 2 cm less than 7 times the length. the perimeter is 60 cm. determine the length and the width of the rectangle

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14-08-2017

P=2(L+W)
60=P=2(L+W)
60=2(L+W)
divide by 2
30=L+W

given
W=-2+7L
subsitute
30=L+W
30=L-2+7L
30=8L-2
add 2
32=8L
divide by 8
4=L

sub back
W=-2+7L
W=-2+7(4)
W=-2+28
W=26

width is 26cm
length is 4cm

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