It depends on what you're asking. If angle a and b are both on a straight line, b would equal 169 degrees because the total has to add up to 180 degrees, but if they are on a right angle, b would equal 79 because it has to add up to 90 degrees.
30. I'm not quite sure.
31.I believe Toulouse
32.Carthage
33.The United Kingdom
The borders of the following countries changed as a result of the World Wars:
Greece
Soviet Union
Czechoslovakia
Poland
Germany
Italy
Estonia
Sweden
Answer: In the proposed case, the light absorption is the variable to be understood <em>- </em>that is, the dependent and aimed observation<em> -</em> by exposing the pigment - the ready thing -, to the four picked color lights in a given experiment.
It can also be inferred about the other hidden concept in the question: controlled variables. Those are the different light colors, because there is choice and control of application of this parameter in the experiment. The pigment came ready, but the lights are chosen to test the light absorption.
Therefore, if the<u> light absorption is the dependent</u>, and the lights are the controlled, <u>the pigment rests as the independent variable.</u>
⇒The pigment is the independent variable, the light absorption is the dependent. (and the lights the controlled variable)
