Barry is trying to calculate the distance between point E(3, 1) and point F(4, 7). Which of the following expressions will he use?

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Barry is trying to calculate the distance between point E(3, 1) and point F(4, 7). Which of the following expressions will he use?

Mathematics
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My answer choices are: A. \[\sqrt{(7-1)^2+(4-3)^2}\] B. \[\sqrt{(7-3)^2+(4-1)^2}\] C. \[\sqrt{(7-4)^2+(3-1)^2}\] D. \[\sqrt{(4-7)^2+(1-3)^2}\]
But I did it myself and I got \[\sqrt{(4-3)^2+(7-1)^2}\]
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I don't need to solve it.
I need to find out which expression he will use to find the distance between (3,1) and (4,7)
I'm pretty sure my answer is right, but it isn't one of the answer choices.
Ah that depends on which you chose as X1, Y1 and X2, Y2
try it in reverse. i.e. chose 4, 7 as X1, Y1, and 3,1 as X2 , Y2
I did, there is no answer choice that starts with 1
Your right the only options for X2 are 3 or 4, and since the distance formula starts with (x2 -x1) then none of the above qualify!
except maybe d?
I don't have a none of the above option though :(
Yeah maybe. I'll try it. Thanks for helping!
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no, no matter which point you make as X1, y1 and x2, y2, none of the above are an option
Yeah so i'm confused on what to choose
sometimes, textbooks get it wrong, just take down both solutions that I have given and hand to your teacher
I will. Thank you!
you're very welcome!
There is a good lesson in this, you done everything right, and if at the end of the day, you have done things right and the answer still doesnt come out, then you have to have confidence in what you do.

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