CPhill

[a+b]+[c] when a=-3, b=7, c=-15    .....so we have.....

[ -3 + 7 ] + [ -15]   =

[ 4 ] + [ -15]  =

-11

(1 + 1 + 1 ) !  =

3!  =

6

(0!   +  0!   +  0!) !  =

(1 + 1 + 1) !  =

3!  =

6

Here you go.....https://www.desmos.com/calculator/8pdwkri0xq

The solution occurs at about (10.33, 64.7)

Note that the "original" volume would be L * W * H

Scaling it down by a factor of 1/10 means that every dimension is just 10%  of its original size = .10

So...the "new" volume is just  ......

.10L x .10W x .10H   =  (.10)³ * L * W * H   where L, W and H were the original dimensions....

Very nice, Omi67....!!!!!!

We've been trying to figure that out ourselves......!!!!!!

Maybe you just have to pretend......

Very nice, Melody.....!!!

 x-y+2z = -1   (1)

     2x+z = 0   →  z = -2x    (2)

 x+5y+z = 5     (3)

Putting (2)  into (1) and (3), we have

x - y + 2(-2x)  = -1

x +  5y - 2x  = 5         simplify  both of these

-3x - y   = -1    →   y = -3x + 1    (4)

-x  + 5y   = 5      (5)

Putting  (4)  into (5), we have

-x + 5(-3x + 1)  = 5

-16x + 5  =  5      subtract 5 from both sides

-16x = 0       → x  =  0

And using (4)

y = -3(0)  + 1    = 1

And using (2)

z = -2(0)   = 0 

So   {x, y, z}   =  {0, 1, 0}

15%  ......there is an implied decimal point after the "5"

Drop the "%"  sign and move the decimal two places to the left  = .15

Another example  :   23.6%   =   .236

Finally :   .006%   =   .00006

Hey.....don't get too cocky........

I know where you live   !!!!!