Answer:
The length of 'x' is 4
 
Step-by-step explanation:
We can use the pythagorean theorem to solve this.
The pythagorean theorem is:


Therefore x = 4
 
        
             
        
        
        
 Answer: (2,-3)
Step-by-step explanation:
 
        
             
        
        
        
So we know that an average is the sum of the scores divided by the number of scores that were added together. In this case we are going to be dealing with 4 tests. So let's say x is the score for our fourth test. We can create this equation:

So then we need to simplify the top:

Then multiply by 4 on both sides to get rid of the denominator:

Then solve for x:

So now we know that Sam needs to score a 67 on the fourth test to have an average score of 50.
 
        
                    
             
        
        
        
The answer is D). A perfect square
b2 - 4ac > 0
Roots are real, unequal and rational.