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The dependent varible is defined as the thing which is being measured in an experiment, whilst the independent variable is the thing that is being manipulated or changed. Extraneous variables are undesira...

Start by rearranging the inequality - make sure the sign next to the x² term is positive to make it easier: 

2x² -5x - 12< 0

Next step is to factorise this quadratic...

Times by 100

0.185 X 100= 18.5%

First make the denominator the same

3/10 X3 

2/15 X2

=9/30 + 4/30

=13/30

The atom consists of three sub-atomic particles: Protons; Neutrons and electrons. Protons and neutrons are in the nucleus of the atom and the electrons occupy the electron shells around the nucleus.