What point located in quadrant I has an x-value that is 2 units from the origin and a y-value 7 units from the origin?

I believe that the answer would be the letter X. The Y units always go left and right (right if positive, left if negative) and the X units always go up and down (up if positive, down if negative).

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