a plane flies northwards for 430km.if the plane flies eastward for 380km.how far is it from its starting point(ignore its height above the ground)

Answer 1

430^2 + 380^2 = x^2

Answer 2

Square root everything:

430+380=x

810=x

Answer 3

John Lee is wrong.

184,900 + 114,400 = x^2

329,300 = x^2

573.8 = x

Answer 4

Ms.Sue there is a little error in your calculations.
Square everything on left hand side :
430^2 + 380^2 = x^2

= 184,900 + 144,400 = x^2

Add up left hand side
= 329,300 = x^2

Square both side
573.8 = x

x = 574km