The volume of a room = length * width * height
=12z³-27z
And by the analysis:
The volume = 12z³-27z
= ( 3z ) ( 4z²-9 ) ⇒ by taking (3z) common
= ( 3z )( 2z+3 )( 2z-3 ) ⇒ <span>the difference between two squares
So </span><span>the dimensions of the room will be 3z , 2z+3 , 2z-3
---------------------------------------------------------------------------
I have attached tha problem
</span>
The answer is 180
correct me if I'm wrong
X = necklaces, y = bracelets
at least twice as many bracelets as necklaces
y > = 2x <===
x > 0 <===
half hour for necklace, 1 hr for bracelet...fewer then 20 hrs
0.5x + y < 20 <==