Answer:
Step-by-step explanation:
Example Equation of an ellipse with horizontal major axis with center at (0,0):
x%5E2%2Fa%5E2%2By%5E2%2Fb%5E2=1
For given problem:
b=20
b^2=400
a=30
  
a^2=900
equation: x%5E2%2F900%2By%5E2%2F400=1
y%5E2%2F400=1-x%5E2%2F900
 
        
                    
             
        
        
        
I found width=13.72 ft and length=43.72 ft.
Call one dimension of the rectangle x, the other will be x+30
You want an area A=600 ft^2 but A=length x width=x*(x+30)=600
Rearranging you get:

solving this quadratic equation you get a negative solution and a positive one that gives your result.
 
        
        
        
The main idea here is to "translate" the words into maths. 
First we need to identify the unknowns and label these. 
We need to know the number if dimes and the number of quarters. So lets say 
x: number of dimes
y: number of quarters
Now lets write equations from the written problem. 
We know that there are 36 coind total, thus: 
x + y = 36
We also know that the coins total 5.85 dollars, but it is better to count in cents, that is 585 cents. 
x are the number of dimes, their value is x*10
y are quarters with value of y*25
thus: 
10x+25y=585
We have two equations and two unknowns now, that needs to be solved to get the answer. 
x + y = 36
10x+25y=585
        
                    
             
        
        
        
4 , 7 , 14 , 19 , 21 , 23 , 23 , 26 , 27 , 30 
Step-by-step explanation:
HOPE IT'S HELP ;)
 
        
             
        
        
        
Answer:
-0.0625
Step-by-step explanation: