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Mathematics 10 Online
OpenStudy (anonymous):

how do i do these?

OpenStudy (anonymous):

wat

OpenStudy (anonymous):

OpenStudy (anonymous):

you gotta compute \[\huge d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\]

OpenStudy (anonymous):

-3 an 5 for the x

OpenStudy (anonymous):

in your case \[\huge d=\sqrt{(-3-5)^2+(2+1)^2}\]

OpenStudy (anonymous):

yeah right

OpenStudy (anonymous):

you can do it in the other order too

OpenStudy (anonymous):

-6 an 3

OpenStudy (anonymous):

cause \((-3-5)^2=(-8)^2=64\) and \((5+3)^2=8^2=64\) so it makes no difference what comes first there is no 6 in the question is there?

OpenStudy (anonymous):

i ment 8 sry

OpenStudy (anonymous):

let me know what you get when you compute \[\huge d=\sqrt{(-3-5)^2+(2+1)^2}\]

OpenStudy (anonymous):

8 sqware an 3 sqwart itss 49 plus 9? not sure what 8 time 8 is

OpenStudy (anonymous):

i don't think 8 squared is 49...

OpenStudy (anonymous):

im not sure what it is

OpenStudy (anonymous):

\[8\times 8=?\]

OpenStudy (anonymous):

gotta know your multiplication tables, but if all else fails use a calculator!

OpenStudy (anonymous):

64

OpenStudy (anonymous):

yay

OpenStudy (anonymous):

so yeah, \(64+9=?\)

OpenStudy (anonymous):

73

OpenStudy (anonymous):

bingo

OpenStudy (anonymous):

then?

OpenStudy (anonymous):

then i guess you choose the right answer from the list ...

OpenStudy (anonymous):

\[ d=\sqrt{(-3-5)^2+(2+1)^2}=\sqrt{8^2+3^2}=\sqrt{64+9}=\sqrt{73}\]

OpenStudy (anonymous):

is the first on alway minus?

OpenStudy (anonymous):

no the first one is whatever you want it to be given your choices

OpenStudy (anonymous):

\[(3,-2),(1,4)\] you could do \[\sqrt{(3-1)^2+(-2-4)^2}\] or \[\sqrt{(1-3)^2+(4+2)^2}\] makes no difference

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