anonymous
  • anonymous
if a plane can travel 490 miles per hour with the wind and 410 miles per hour against the wind find the speed of the plane with out wind and with the speed of the wind?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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inkyvoyd
  • inkyvoyd
okay so here you have 2 speeds you do not know: the speed of a plane and the speed of the wind. Defining the speed of the plane to be positive, if the plane travels with the wind then x+y=490 If the plane travels against the wind then x-y=410 Do you know how to solve this system?
anonymous
  • anonymous
yes
inkyvoyd
  • inkyvoyd
okay, let me know what you get :)

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More answers

anonymous
  • anonymous
wait im a little confused to do i add these equations to get my answer?
inkyvoyd
  • inkyvoyd
that' one way to do it x+y=490 x-y=410 +------- 2x+0y=0-- so you get 2x+0y=900
anonymous
  • anonymous
so x=450
inkyvoyd
  • inkyvoyd
yes - now do you know how to find the speed of the wind?
anonymous
  • anonymous
negative
inkyvoyd
  • inkyvoyd
just put it in the original equation. x+y=490 we know that x=450 so now what?
anonymous
  • anonymous
k. got it y=40.
inkyvoyd
  • inkyvoyd
yup
anonymous
  • anonymous
thanksfor your help
inkyvoyd
  • inkyvoyd
np :)

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