Let's assume
length =l
width =w
we are given
the width of a rectangle is 7 feet less than its length
so, we get
now, we know that
area = length*width
now, we can plug w
we have
Area=170
now, we can factor it
now, we can solve for l
now, we can find width
so, dimensions are
...............Answer
Answer:
the first diagram
Step-by-step explanation:
first one
Answer: Length = 10 inches, Width = 7 inches
Step-by-step explanation:
Area = L x W
Area = 70 square inches
Length = 2W - 4
70 = 2w - 4 x w
70 = 2w^2 - 4w
2w^2 - 4w = 70
2w^2 - 4w - 70 = 0
Factor
(2w + 10)(w-7) = 0
w = 7
70 = L x 7
L = 10
The correct answer is 784 m^2
