1. Given
2. Definition of Supplementary Angles
3. First Substitution 
4. Subtraction property of Equality 
5. Second Substitution 
6. Exterior Side in Opposite Rays
7. If corresponding angles are equal, then lines are parallel
        
             
        
        
        
Answer:
So to maximize profit 24 downhill and 20 cross country shouldbe produced
Step-by-step explanation:
Let X be the number of downhill skis and Y the number of cross country skis.
Time required for manufacturing and finishing each ski are: manufacturing time per ski, downhill 2.5 hours, cross country 1.5 hours
Finishing time per ski: downhill 0.5 hours, cross country 1.5 hours. 
Total manufacturing time taken = (2.5) x+ (1.5+) y = 2.5x+1.5y≤90
total finishing time taken = 0.5x+1.5 y≤42
Profit function 
Z = 50x+50y
Objective is to maximize Z
Solving the two equations we get intersecting point is
(x,y) = (24,20)
In the feasible region corner points are (0.28) (36,0)
Profit for these points are
i) 2200 for (24,20)
ii) 1400 for (0,28)
iii) 1800 for (36,0)
So to maximize profit 24 downhill and 20 cross country shouldbe produced.
 
        
             
        
        
        
Box one ratios
Box two 35:2= 70:4
        
             
        
        
        
Answer: 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
$20
Step-by-step explanation:
I = 400(.05)(1)
I = 20