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2 years ago

the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions

Mathematics

1 answer:

KIM [24]2 years ago

6 0

Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft

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2 years ago

The price of a company's share dropped by 3.50% by the end of the first year, down to $44.25. During the second year the price o

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Answer:

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b. $43.87

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So, Price of share at the end of first year = x - 3.5% of x

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2 years ago

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