Answer:
There is no solution to 
Step-by-step explanation:
That's because when you use
that means you want the absolute value, which makes all numbers that are put into those to lines positive. The absolute value is used when you aren't using negative numbers or working with something that can't be in the negative. Think about it like a number line but the negative side to the left doesn't exists.
If you try plugging in -11 which would normally make that -6, it will change it from -11 to positive 11.

Anything you put into absolute value will be positive. So you won't be able to get -6 with this formula because you'll always be adding and to get -6 you need to subtract.
Answer:
Step-by-step explanation:
Given :
base length = 2
side lengths = x
dx/dt = 5 unit/min
Determine d∅ / dt at x = 2
d∅ / dt at x = 2 = 
attached below is a detailed solution
Solve for x:
10 (x + 2) = 5 (x + 8)
Expand out terms of the left hand side:
10 x + 20 = 5 (x + 8)
Expand out terms of the right hand side:
10 x + 20 = 5 x + 40
Subtract 5 x from both sides:
(10 x - 5 x) + 20 = (5 x - 5 x) + 40
10 x - 5 x = 5 x:
5 x + 20 = (5 x - 5 x) + 40
5 x - 5 x = 0:
5 x + 20 = 40
Subtract 20 from both sides:
5 x + (20 - 20) = 40 - 20
20 - 20 = 0:
5 x = 40 - 20
40 - 20 = 20:
5 x = 20
Divide both sides of 5 x = 20 by 5:
(5 x)/5 = 20/5
5/5 = 1:
x = 20/5
The gcd of 20 and 5 is 5, so 20/5 = (5×4)/(5×1) = 5/5×4 = 4:
Answer: x = 4
you must look to the ten-thousandths place, and if it is a 5 or higher, round up. if it is a four or less, round down.