Explanation is in a file

 
        
             
        
        
        
Answer:
  and
 and 
Step-by-step explanation:
Given:
Equation 1:

Simplifying the above equation by dividing both sides by 100


Equation 2:

Simplifying the above equation by dividing both sides by 400.


Now the system of equation is:
(1a) 
(2a) 
Solving by elimination
Multiplying equation (2a) with 

(2b) 
Adding equations (1a) and (2b) in order to eliminate 
       
+  
We get 
∴ 
Plugging  in equation (2a).
 in equation (2a).

Adding  both sides.
 both sides.

∴ 
 
        
             
        
        
        
Answer:
15.09
Step-by-step explanation:
with reference angle 28°
perpendicular (p) = 8
base (b) = x
Now 
tan 28° = p / b
0.53 = 8 / x
x = 8 / 0.53
x = 15.09