Answer:
x=3/4
Step-by-step explanation:
You need to isolate the variable. First subtract 3 from both side, then add 1x to both sides. You will end up with 1 1/3x=1. After that divide both sides by 1 1/3.
Let 
be the cost, respectively, of a notebook and a pen. If you buy 2 notebooks and 3 pens (which we know is a cost of $14.50), you spend 
Similarly, if you buy 1 notebook and 2 pens (which we know is a cost of $7.50), you spend 
These two equations form the following system:
Multiply the second equation by 2:
Subtract the first equation from the second:
So, a pen costs 0.5 dollars. Plug this equation in the second equation:
Answer:
950.455in^3
Step-by-step explanation:
Given data
Circumference= 11π
Also, the expression for circumference is
C=2πr
11π=2πr
solve for r
r= 11π/2π
r= 5.5in
Given that the Height h= 10in
The expression for the volume is
V= πr^2h
V=3.142*5.5^2*10
V=3.142*30.25*10
V=950.455 in^3
Hence the volume is
950.455in^3
Answer:
3a
Step-by-step explanation:
9/3 = 3
b / b = 1
3 x a x 1 = 3a
