Arectangular bench top is a wooden plank with an area of 8 square feet. the width of the bench top is 2 feet less than its length.

area of rectangle = L x w

area = 8 sq ft

w= L-2

 so 8 = L *L-2

8 = l^2-2l

l^2 -2l-8 = 0

(l-4) (l+2)=0

 Length = 4 feet

Width = 2 feet

b.an increase in a causes b to decrease

could

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