SOLUTION: Please, I need help onto solve this: On a rectangle, if the length is 5 less than 3 times the width, and the area is 112 cm, what is an equation to help you find the sides of the r
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Question 971585: Please, I need help onto solve this: On a rectangle, if the length is 5 less than 3 times the width, and the area is 112 cm, what is an equation to help you find the sides of the rectangle. Please help, thank you.
Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
On a rectangle, if the length is 5 less than 3 times the width, and the area is 112 cm, what is an equation to help you find the sides of the rectangle.
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width = w
length = 3w-5
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Area = width*length
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w(3w-5) = 112
3w^2 - 5w - 112 = 0
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(w-7)(3w+16) = 0
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width = w = 7 cm
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length = 3w-5 = 16 cm
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Cheers,
Stan H.
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Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
On a rectangle,
if the length is less than times the width , then
....eq.1
and if the area is , then
....eq.2............substitute from eq.1
......solve for
....factor...write as
......group
solutions: since we have a rectangle, we will need only positive solution and that is =>
now go to eq.1 and solve for
....eq.1
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