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

Required
Find x and y
In the second equation. Assume that:

Substitute  in the first equation
 in the first equation


Collect like terms


Multiply through by 5


Solve for x

Substitute this value of x in 





 
        
             
        
        
        
Answer: H. 139.50
Step-by-step explanation:
Multiply 9 by 8 first and you get 72. Then multiply 9 by 7.5 and you get 67.5 then add 72 and 67.5 and you get 139.5 or 139.50
 
        
             
        
        
        
Answer:
0.3
Step-by-step explanation:
 
        
                    
             
        
        
        
4.  Supplementary angles together make a straight line (two right angles).  So BOE is supplementary to BOC
Answer: ∠BOE
5. Distance and midpoint between (4,-2), (6,8)

midpoint

Answer: distance 2√26, midpoint  (5, 3)
6.That's a rectangle oriented parallel to the axes, width parallel to the x axis of 7 - -3 = 10 and length along y of  1 - - 4 = 5, so an area of 10(5)=50
Answer: 50
 
        
             
        
        
        
Answer:
(x-2)²/100 + (y+3)²/64 = 1
Step-by-step explanation:
C (2,-3): h=2 k=-3
semimajor axis (CV): a=12-2=10
center-foci: c=8-2=6
semi minor axis: b² = a²-c²= 100 - 36 = 64
equation: (x-h)²/a² + (y-k)²/b² = 1
(x-2)²/100 + (y+3)²/64 = 1