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Mathematics 8 Online
OpenStudy (freemap):

help

OpenStudy (freemap):

OpenStudy (freemap):

15.8

OpenStudy (freemap):

@texaschic101

OpenStudy (freemap):

@ganeshie8

OpenStudy (freemap):

@Mehek14

ganeshie8 (ganeshie8):

how did you get 15.8 ?

OpenStudy (freemap):

My friend said that took the square root and then add

ganeshie8 (ganeshie8):

Could you show your work /

OpenStudy (freemap):

hold on I'll ask the steps

OpenStudy (freemap):

My friend said the square root of 52 is 7.2+8.6=15.8 I said that since it was distance It would be 10-1^2+3-6^2, 9^2+-3^2, 81+9, square root of 90=9.4 but my friend said that her answer is correct

OpenStudy (freemap):

are neither of us correct is my friend correct

OpenStudy (freemap):

or me

ganeshie8 (ganeshie8):

do you just want the answer ?

OpenStudy (freemap):

no, I'm saying if both of us aren't correct what do I have to do, I've already tried the distance formula

ganeshie8 (ganeshie8):

try it again

ganeshie8 (ganeshie8):

whats the distance formula ?

OpenStudy (freemap):

x2-x1^2 +y2-y1^2

ganeshie8 (ganeshie8):

wrong

ganeshie8 (ganeshie8):

careful about using parenthesis correctly

ganeshie8 (ganeshie8):

also you're missing a sqrt

OpenStudy (freemap):

-6-1+3-10 -7^2+-7^2 49+49=98 sqrt 98=9.89 @ganeshie8

ganeshie8 (ganeshie8):

Wrong

ganeshie8 (ganeshie8):

Lets do this step by step maybe ?

OpenStudy (freemap):

okay

ganeshie8 (ganeshie8):

You want to find the distance between points (1, -6) and (10, 3)

ganeshie8 (ganeshie8):

distance formula \[\sqrt{(\color{red}{x_2-x_1})^2+(\color{blue}{y_2-y_1})^2}\]

ganeshie8 (ganeshie8):

whats the value of \(\color{red}{x_2-x_1}\) here ?

OpenStudy (freemap):

-6-1

ganeshie8 (ganeshie8):

Careful, you need to subtract the respective x coordinates.

ganeshie8 (ganeshie8):

but you're subtracting x coordinate from the y coordinate

ganeshie8 (ganeshie8):

that is wrong, try again

OpenStudy (freemap):

oh I know why I was messing up I was using the y coordinate, 10-1

ganeshie8 (ganeshie8):

good, \[\color{red}{x_2-x_1} = \color{red}{10-1}\]

OpenStudy (freemap):

10-1^2 - 3--6^2 9^2-9^2 81-81

OpenStudy (freemap):

wait I think I messed up somewhere

ganeshie8 (ganeshie8):

(10-1)^2 \(\color{red}{+}\) (3--6)^2 9^2 \(\color{red}{+}\) 9^2 81 \(\color{red}{+}\) 81

ganeshie8 (ganeshie8):

don't forget to take the sqrt in the end

OpenStudy (freemap):

distance is 12.72

ganeshie8 (ganeshie8):

nearest tenth it would be 12.7

OpenStudy (freemap):

oh okay thank you so much, I have done my other questions but will you check them?

OpenStudy (freemap):

@ganeshie8

OpenStudy (freemap):

@ganeshie8 I don't need you here anymore I noticed that you were still here

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