Answer:  
 
Step-by-step explanation:
you would multiply by 3 on both sides to get the division to go away.
then subtract 8 from both sides.
then you have your answer
 
        
             
        
        
        
Answer:
(7,12),(-12,-7)
Step-by-step explanation:
x^2 + y^2 = 193
x - y = - 5
x = y - 5
(y - 5)^2 + y^2 = 193
y^2 - 10y + 25 + y^2 = 193
2y^2 - 10y + 25 = 193
2y^2 - 10y + 25 - 193 = 0
2y^2 - 10y - 168 = 0 
2*(y^2 - 5y - 84) = 0     This factors into 
2*( y - 12) (y + 7) = 0
y = 12    
in which case x = 12 - 5 = 7
y = - 7
in which case x = -7 - 5 = - 12
 
        
             
        
        
        
Answer:
 The width of the window should be  and the height of the window should be
 and the height of the window should be 
Step-by-step explanation:
we know that
The circumference of a semicircle (window) is equal to

we have that


substitute and solve for r


so
the width of the window is equal to the diameter of the semicircle
so
 The width of the window should be  and the height of the window should be
 and the height of the window should be 
 
        
             
        
        
        
Answer:
45 old houses
Step-by-step explanation:
new houses : old houses 
3 : 9 
15 : ? 
(3 = 1st ratio and 9 = 2nd ratio)
To find the missing ratio, divide the first ratio from the new ratio:
15 / 3 = 5
Take the product and multiply that by the second ratio to find the missing ratio:
9 x 5 = 45
 
        
                    
             
        
        
        
Answer:
I think The White one is 3.61 and the purple is 10....
Step-by-step explanation:
we just divide the shapes into separate and find the area of each separate shape