Question

Is this correct?
distance formula

Answer 1

no

Answer 2

nope there is negative sing x_2 - x_1
and X_1 is -4

Answer 3

sign* :P

Answer 4

\(\Large\color{black}{ \displaystyle {\rm D} =\sqrt{ (\color{blue}{{\rm y}_1}-\color{red}{{\rm y}_2})^2+(\color{green}{{\rm x}_1}-\color{darkgoldenrod}{{\rm x}_2})^2 }}\)


where
\(\Large\color{black}{ \displaystyle {\rm D} }\) is the distance.

\(\Large\color{black}{ \displaystyle (\color{green}{{\rm x}_1}~,~~\color{blue}{{\rm y}_1}) }\) and \(\Large\color{black}{ \displaystyle (\color{darkgoldenrod}{{\rm x}_2}~,~~\color{red}{{\rm y}_2}) }\) are your two points.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\(\large\color{slate}{ A--B=~~~\Longrightarrow~~~A+B }\)

(as you know)

Answer 5

Oh yeah, so a is the right answer.

Answer 6

yep

Answer 7

yes, A and?

Answer 8

A and C.

Answer 9

yep right :)

Answer 10

yes

Answer 11

\(\large\color{slate}{ \sqrt{250}=\sqrt{25\cdot 10}=5\sqrt{10} }\)

Answer 12

good job!

Answer 13

Thanks! :)