samanthasheets8362
28.01.2020 •
Mathematics
Cisco is 50 feet from the base of the tree when he spots his friends zorro the cat at the top of the tree that is 42 feet high, from where he is standing what is the angle of elevation when he looks at his friend
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Ответ:
Ответ:
The width can be 5 ft or the width can be 4 ft
Step-by-step explanation:
Perimeter = 2 (l+w) for a rectangle
Area = l*w for a rectangle
Using perimeter
18 = 2(l+w)
Divide by 2
18/2 = 2/2 (l+w)
9 = l+w
Solving for l
9-w = l
Using area
20 = l*w
Substituing for l
20 = (9-w) * w
20 = 9w - w^2
Subtract 20 from each side
20-20 =-w^2 +9w -20
0 = -w^2 +9w -20
Multiply by -1
0 = w^2 -9w+20
Factor
0 = (w-5) (w-4)
Using the zero product property
w-5 = 0 w-4 = 0
w= 5 w=4
The width can be 5 ft or the width can be 4 ft