12/20 divide top and bottom by 4
(12/4) / (20/4) = 3/5
The web2.0 calc will do these for you enter 12 / 20 = and look above the display area
x/8 = 21/24 Multiply both sides of the equation by 8
8 * x/8 = 21/24 *8
x = 21/3
x=7
((4/3)^(-1/2) )^(-2/3) =
4/3^(-1/2 * -2/3)
4/3^(2/6)
4/3^(1/3)=\(\sqrt[3]{4/3}\)
Really straightforward....
50 meters / 10 seconds = 5 m/s 5 meters per second
Here is the first one (the second one is very similar and you should be able to manage it)
y/5 = 2.4 Multiply both sides by 5
5 * y/5 = 2.4 x 5
y = 2.4 x 5 (the 5's cancel)
y= 12
A mole IS 6.02 x 10^23 atoms
in two moles there are 2 x 6.022x 10^23 atoms = 12.044 x 10^23 atoms = 1.2044 x 10^24 atoms
C-(6.6) =18.5 add 6.6 to both sides
C= 25.1
Since there is no value of 'x' for which this is 'undefined' and there are no limits on 'y'
All x
From - infinity to + infinity
First find a common denominator 100 will do
3 3/10 = 33/10 or 330/100
330/100 - 2 23/100 =
330/100 - 223/100 = 107/100 = 1 7/100
