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Vladimir79 [104]
3 years ago
11

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?

Mathematics
2 answers:
Dovator [93]3 years ago
7 0

Answer:

the width of the border is w=1.5 in

Step-by-step explanation:

larisa86 [58]3 years ago
6 0
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


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