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Mathematics

1 answer:

AysviL [449]3 years ago

7 0

Let's call Frank's house F, Derek's one D n Evan's E.

F(5,-4)
E(-3,-4)
D(-3,4)

FE=5-(-3)=5+3=8
ED=4-(-4)=4+4=8

We can see the triangle is a half of a square, so FD is 8(√2)≈11.312

11.312+8=19.312

The answer is C.19.31

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