anonymous
  • anonymous
Find the distance between the following pairs of points: (-4,3),(2,5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
\[d=\sqrt{(-4-2)^2+(5-3)^2}\]
AkashdeepDeb
  • AkashdeepDeb
You know everything about this question! What seems to be the problem here @Algebra2013 ? :D
anonymous
  • anonymous
I got \[\sqrt{40} for an answer but \it is wrong???\]

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anonymous
  • anonymous
I came up with 40 squared which is wrong? please help
AkashdeepDeb
  • AkashdeepDeb
Are you sure those ARE the points? Because sqrt 40 IS THE RIGHT ANSWER! :D
anonymous
  • anonymous
one moment
anonymous
  • anonymous
correct points answers are::::: \[2\sqrt{10} , \sqrt{28} , \sqrt{8} , or 10\]
anonymous
  • anonymous
Anyone come up with one of these??
AkashdeepDeb
  • AkashdeepDeb
2 sqrt 10 is correct! :) Because sqrt 40 can be written as \[\sqrt{2*2*10} = 2 * \sqrt{10}\] Understood? :)
anonymous
  • anonymous
Yes, thank you for the much needed help
AkashdeepDeb
  • AkashdeepDeb
:)
anonymous
  • anonymous
Mary and Jane are both at the gas station at Hill and Elm. From the station, Mary drives 10 miles east and Jane drives 15 miles south. Find the distance between Mary and Jane
AkashdeepDeb
  • AkashdeepDeb
Do you know Pythagorus' theorem?
anonymous
  • anonymous
midpoint??
anonymous
  • anonymous
\[=(\frac{ x+X }{ 2 }),(\frac{ y+y }{ 2 })=\]
AkashdeepDeb
  • AkashdeepDeb
No No Pythagorus' theorem? Ever heard of it or not? :/
anonymous
  • anonymous
No
anonymous
  • anonymous
is there a formula?
anonymous
  • anonymous
Did you get 5 for an answer?
AkashdeepDeb
  • AkashdeepDeb
I suggest you go through this before the formula! :) http://www.mathwarehouse.com/geometry/triangles/how-to-use-the-pythagorean-theorem.php
anonymous
  • anonymous
ok there are only 2 numbers we can use which are 10 miles east and 15 miles south
AkashdeepDeb
  • AkashdeepDeb
Yes! And they form a right angle inbetween them. :) Read the page I sent you.
anonymous
  • anonymous
\[10^{2}+15^{2}=X\]
AkashdeepDeb
  • AkashdeepDeb
10^2+15^2=X^2
AkashdeepDeb
  • AkashdeepDeb
Not X X^2 :D
anonymous
  • anonymous
I got 18
anonymous
  • anonymous
=325 (18)(18)=325 x=18
anonymous
  • anonymous
\[5\sqrt{13}, -5\sqrt{13}\]
anonymous
  • anonymous
got it thank you very much
AkashdeepDeb
  • AkashdeepDeb
Yes nearly very close to 18!! :D :)
anonymous
  • anonymous
hahahaha
anonymous
  • anonymous
if the midpoint of two points is (5,-1) and one of the points is (4,-3), find the other point
AkashdeepDeb
  • AkashdeepDeb
Just use the formula you told me! And take the other point as say (x,y) Understood? :)
anonymous
  • anonymous
one moment
anonymous
  • anonymous
9 doesn't go into 2????
anonymous
  • anonymous
\[\frac{ 5+4 }{ 2}, \frac{ -1+-3 }{ 2 }\]
AkashdeepDeb
  • AkashdeepDeb
See take it like you told me yourself \[Midpoint = (\frac{ x1 + x2}{ 2 } , \frac{ y1 + y2 }{ 2 })\] Now let the other point be = (x,y) So we can also write the above equation as \[(5,-1) = (\frac{ 4 + x}{ 2 } , \frac{ -3 + y }{ 2 })\] So \[5 = \frac{ 4+x }{ 2 } AND -1 = \frac{ -3+y }{ 2 }\]\
anonymous
  • anonymous
x=6, y=1
anonymous
  • anonymous
(6,1)
AkashdeepDeb
  • AkashdeepDeb
Yes! You got it! :D
anonymous
  • anonymous
Thank you so much!!!!!!!!!!!
AkashdeepDeb
  • AkashdeepDeb
:)
anonymous
  • anonymous
A painter is going to paint the trim of a window located 18 feet from the ground. If the base of the ladder is placed 9 feet from the side of the house, how long does the ladder need to be to reach the window?
AkashdeepDeb
  • AkashdeepDeb
Use Pythagorus here too. See @Algebra2013 I cannot help you with all questions. You have to figure most out yourself. :)

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