A rectangular stained glass window is 2 feet by 4 feet. A clear glass border is constructed around the stained glass window. the
width of the border is equal and was made out of 7 square feet of clear glass. What is the width of the border? A. 0.5ft B. 1.5 ft C. 2.5 ft D. 3.5 ft
2 answers:
Answer:
The answer is the option A

Step-by-step explanation:
Let
x-------> the width of the border
we know that
The total area of the window plus the border is equal to


Using a graphing tool -----> to resolve the quadratic equation
see the attached figure
The solution is

S=2(4x+2x)+4x^2=
=4x^2+12x
4x^2+12x=7
4x^2+12x-7=0
D=12^2-4×4×(-7)=256
x1=(-12-16)/(2×4)=-3,5 (impossible)
x2=(-12+16)/(2×4)=0,5
A
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Answer:
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Step-by-step explanation:
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Answer:
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Step-by-step explanation:
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