Annetta_Martin
With a tail wind, a plane traveled 800 mi in 5 hours. With a head wind, the plane traveled the same distance in 8 hours. Which system of equations could be used to solve this problem?
(s + w)5 = 800 and (s - w)8 = 800
(s - w)5 = 800 and (s + w )8 = 800
5s + 8w = 800 and 5s - 8w = 800
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Peter14
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which one do you think it is?
Annetta_Martin
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The first one, I'm sure!
Annetta_Martin
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Please tell me I'm right haha
Peter14
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you are right :)
Peter14
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any other problems?
Annetta_Martin
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Yes I just have two more questions to finish my online study guide....
Annetta_Martin
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Annetta_Martin
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@bahrom7893 @ganeshie8 @mathstudent55 @AriPotta
ganeshie8
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for the first 1, whats the coordinate where the blue and green lines intersect ?
Annetta_Martin
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2, -1
ganeshie8
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thats right !
Annetta_Martin
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Yay! Ok :)
ganeshie8
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second q : do u knw how coordinates of points of line y=x look like ?
ganeshie8
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(0, 0), (1, 1), (2, 2), (3, 3), (4, 4), (5, 5),.....
right ?
Annetta_Martin
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Yes
ganeshie8
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do u see any such point in the given line ?
ganeshie8
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or easy way is to look at given options !
Annetta_Martin
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4,4 right?
ganeshie8
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right !, and u can confirm it in the graph also. if u see, the line is actually going thru (4,4)
Annetta_Martin
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Thank you soo much! You're awesome for explaining everything :D
ganeshie8
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np.. yw !