8x-2+9-6x=0
2x+7=0
2x=-7
x=-3.5
Answer:
The surface area of the cube is 
Step-by-step explanation:
we know that
The length of a diagonal of a cube is equal to

where
b is the length side of a cube
In this problem we have

so

solve for b

Simplify

<em>Find the surface area of the cube</em>
The surface area of the cube is equal to

substitute the value of b

Answer:
$28,455
Step-by-step explanation:
Change 15% into a decimal.
(15)(1/100)=0.15
***(1/100) because 15 part of the whole 100 percent/.
(189,700)(0.15)
=28455
12 3/4 as a decimal is 12.75
The area of a rectangle is length times width.
So if you divide the area (12.75) by the length(3.4)
you will get a width (and answer) of 3.75 :)