Base on the triangle below or in your problem, to calculate the x in the triangle having one angle measure 53 degree and the side measures 35 and the value of x is equals to 112.79. I hope you are satisfied with my answer and feel free to ask for more if you clarifications and further questions 
        
                    
             
        
        
        
If the angle in B is 45º, that means the angle in A is also going to be 45º, considering it's a right triangle, so AC and BC are they have the same length.
Then using Pythagoras, you'll get that 

 equals 

 . 
Now, you know that AC=BC and that AB=24.
So you'll get 

 . You do the square root in both sides and you get that 2AC=24 and AC=12. 
Now that you know that both AC and BC equal 12, you can find the area by just multiplying them and then diving them by 2. (The formula for the area of a triangle is half base multiplied by height, and in a right triangle, if a cathetus is the base, the other cathetus<span> will be the height)
And so the area is equal to 72.</span>
 
        
        
        
Her average score for the 3 turns is 40 because you have to add all of the scores so -80 and -120 is -200 so add that to 320 and you get 120 divide that by 3 because she took 3 turns and you get 40
        
             
        
        
        
 The answer to that question is Random Sampling
        
                    
             
        
        
        
It would be mean. The mean is the average that is you are looking for, since she wants a summerization of all the values in the data set. To find the mean (average) add all the numbers and then divide by the amount of numbers.