There are about 1.61 kilometers in 1 mile. Let $$x represent a distance measured in kilometers and $$y represent the same distance measured in miles. Write an equation that relate a distance measured in kilometers and the same distance measured in miles.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

the answer is 9 because the question is telling how much it be together.