Independent variables are things that can stand alone. Which set of these variables does not rely on each other?  For example the income and savings. I want 1,000,000 in my savings account, however my income is not nearly that high since I only make 19,000. Look at the other pairs and see if there is a correlation between them. 
        
                    
             
        
        
        
A <u>formula</u> is a mathematical statement that calculates a value and each formula must always begin with an equal sign. A formula is used to express the mathematical relationship, information and rules symbolically and concisely. It basically summarizes the solution to a problem.
        
                    
             
        
        
        
Answer:
The  same (42 degrees)
Step-by-step explanation:
This is because the angles are congruent or the same. 
 
        
                    
             
        
        
        
Answer:
Below.
Step-by-step explanation:
One example is a square.
Another is a rectangle.
Both of these contain 4 right angles.