A standard algorithm is a step-by-step way to solve a problem.
 
        
        
        
Answer:
2 parts white paint
Step-by-step explanation:
Blue : white
3      :    1
We use 6 parts blue
3 *2 =6
So multiply each part by 2
Blue : white
3*2   :    1*2
6       : 2
She uses 2 parts white paint
 
        
             
        
        
        
You need to explain to us what to do or else nobody will understand what your trying to ask for.
 
        
             
        
        
        
Check the picture below.
notice the composite is just,
a 5x2 rectangle.
a triangle(yellow) with a base of 2 and a height of 2.
a triangle(red) with a base of 6 and a height of 4.
get the area of each, sum them up, and that's the area of the composite.
 
 
        
        
        
The answer is 5 units. the top is 10, and x is half of that