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Mathematics 7 Online
OpenStudy (anonymous):

Help ???

OpenStudy (xguardians):

What do you need help with?

OpenStudy (anonymous):

OpenStudy (anonymous):

OpenStudy (xguardians):

Sorry, i'm not really sure how to do this. But here after a little searching this might be able to help you! "Use the magnitude formula. The formula for the magnitude of vector v is |v| = sqrt(x^2 + y^2). Plug the values of the vector in this formula."

OpenStudy (anonymous):

@Data_LG2 Can you help pretty please?

OpenStudy (anonymous):

use the distance formula to calculate for the magnitude, do you know the distance formula?

OpenStudy (anonymous):

Its D= x2-x1squ2 +y2-y1squ2

OpenStudy (anonymous):

right :) substitute the points of A and B into the formula \(\Large d=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}\\\Large |AB|=\sqrt{(3-(-5))^2+(1-3)^2}\) tell me what you got and i'll check it

OpenStudy (anonymous):

I got 4 and 64...

OpenStudy (anonymous):

why did you get two values? It is looking for the magnitude not a point, so it should only have one value

OpenStudy (anonymous):

oh so 68

OpenStudy (anonymous):

can you show me your solution?

OpenStudy (anonymous):

or 2 square root of 17

OpenStudy (anonymous):

yep , that's right

OpenStudy (anonymous):

yay okay can you help me with two more qs and id be finished??? Please?

OpenStudy (anonymous):

*finished

OpenStudy (anonymous):

OpenStudy (anonymous):

first multiply the coordinates by two

OpenStudy (anonymous):

I got -12 and 16

OpenStudy (anonymous):

ok, then square each one of them

OpenStudy (anonymous):

so i got 3.5 and 4

OpenStudy (anonymous):

no, what i mean is "square" each of them not the square root \((12)^2\ (16)^2\)

OpenStudy (anonymous):

oh 144 and 256

OpenStudy (anonymous):

After that, add them Then get the square root of their sum you are just basically doing this: \(|v|=\sqrt{(x)^2+(y)^2}\) :)

OpenStudy (anonymous):

Omg thanks i got 20 :)

OpenStudy (anonymous):

okay last one...please...

OpenStudy (anonymous):

OpenStudy (anonymous):

This one probably is the same as the one before. Use the distance formula to get t he magnitude

OpenStudy (anonymous):

i did and i got 125

OpenStudy (anonymous):

are you sure? can you show me your solution?

OpenStudy (anonymous):

-5^2 + -10^2 25 +100= 125

OpenStudy (anonymous):

yeah i made a mistake but im not sure where

OpenStudy (anonymous):

\(\Large (4-6)^2 ?\)

OpenStudy (anonymous):

also don't forget to get the square root

OpenStudy (anonymous):

oh i got -10 when i was supposed to get -2 huh

OpenStudy (anonymous):

it's alright everybody make mistakes ;) so what would be the right answer?

OpenStudy (anonymous):

Square root 29

OpenStudy (anonymous):

right

OpenStudy (anonymous):

Yay! Thanks so much! :)

OpenStudy (anonymous):

Always remember that if you are looking for the \(\Large \color{red}{magnitude}\) of: •two points, use the distance formula : \(\Large \color{blue}{|d|=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}}\) •a vector, use the Pythagorean theorem: \(\Large \color{blue}{|v|=\sqrt{(x)^2+(y)^2}}\) your welcome (^_^)

OpenStudy (anonymous):

Thank you :)

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