<span>Postulates are helpful because it helps you plan and solve geometry problems.
That's my guess. It doesn't tell me in the text either.</span>
6+3w (don't mind this it has to be 20 characters long)
<span>5(2x - 1) = 6 (distribute the 5)
10x-5=6 (add 5 on both sides)
10x=11 (divide by 10 on both sides)
x=1.1
the answer is 1.1</span>
Yes, that is a solution to the system.
V=hpir^2
r=10
v=6283
6283=hpi10^2
6283=100hpi
divide both sides by 100
62.83=hpi
aprox pi=3.141592
divide both sides by pi
19.9994143=h
so about 20 inches