AlexP1031 AlexP1031

08-04-2020
Mathematics

contestada

Barack walks 2 kilometers south and then x kilometers east. He ends 5 kilometers away from his starting position. Find x rounded to the nearest tenth of a kilometer.

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juls1816 juls1816

08-04-2020

So this is a Pythagorean problem where
A^2+b^2=c^2

a is 2
X is b
5 is c

Plug that into the equation and get

4+b^2=25

B^2=21
B=sqrt(21)=4.6kilometer

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