Bearing in mind that an absolute value expression is in effect a piece-wise function with two cases, thus

$\bf |-n|=
\begin{cases}
+(-n)\\
-(-n)
\end{cases}\implies 
\begin{cases}
-n\\
n
\end{cases}
\\\\\\
n|-n|=2n\implies 
\begin{cases}
n-n=2n\implies 0=2n\implies &0=n\\
n+n=2n\implies 2n=2n\impliedby &inconsistent
\end{cases}$

6 0

3 years ago

Help me ples!!!!!!!!!!!!!!!!!

bearhunter [10]

It would be subtraction I think

6 0

3 years ago

Which of the following statements about the distance formula is TRUE?

Licemer1 [7]

B is correct. The distance formula can be written correctly in several different ways. Examples:

sqrt( change in x)^2 + (change in y)^2 )

sqrt( (x2-x1)^2 + (y2-y1)^2 )

4 0

3 years ago

A stick of gum is 2 inches long. Are 10 sticks of gum longer than 3 feet? ​

A stick of gum is 2 inches long. Are 10 sticks of gum longer than 3 feet?