A photo is printed on an 11-inch by 13-inch piece of paper. The photo covers 80 square inches and has a uniform border. What is
the width of the border?
2 answers:
Let
w--------> <span>width of the border
we know that
(11-2w)*(13-2w)=80--------> 11*13-22w-26w+4w</span>²=80
143-48w+4w²-80=0
4w²-48w +63=0
using a graph tool------> to resolve the second order equation
see the attached figure
the solution are
w1=1.5
w2-10.5--------> is not solution
the answer is
the width of the border is w=1.5 in
w--------> <span>width of the border
we know that
(11-2w)*(13-2w)=80--------> 11*13-22w-26w+4w</span>²=80
143-48w+4w²-80=0
4w²-48w +63=0
using a graph tool------> to resolve the second order equation
see the attached figure
the solution are
w1=1.5
w2-10.5--------> is not solution
the answer is
the width of the border is w=1.5 in
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Solution
1) Simplify
<span> to </span>
<span>−2= </span>
+ 
2) Simplify + <span>to <span>914</span>
</span> <span>−2= </span>
3) <span>Add 2 to both sides
</span> = <span>+2
</span>
4) Simplify
<span><span>+2</span> to </span>
=
5) <span>Multiply both sides by 7
</span><span>4y= </span> <span>×7
</span>
6) Simplify <span><span>×7</span> to </span>
=
7) Simplify<span> to </span>
=
8) <span>Divide both sides by 4
</span>y= <span>×4
</span>
9) <span>Simplify <span>2×4</span> to 8
</span><span>y=</span>
<span><span>
Hope this helps
</span></span>
1) Simplify
2) Simplify
</span>
3) <span>Add 2 to both sides
</span>
</span>
4) Simplify
5) <span>Multiply both sides by 7
</span><span>4y= </span>
</span>
6) Simplify
7) Simplify
8) <span>Divide both sides by 4
</span>y=
</span>
9) <span>Simplify <span>2×4</span> to 8
</span><span>y=</span>
<span><span>
Hope this helps
</span></span>