10+5x=50
subtract ten from both sides 
5x=40
divide five from both sides
x=8
samuel will need to paint 8 additional rooms
        
             
        
        
        
Answer:
36 m^2
Step-by-step explanation:
the formula for the area of a triangle is 1/2•b•h
so you’re going to do 1/2 times 12 times 6 to get the area of 36 m^2
 
        
             
        
        
        
Answer:
Step-by-step explanation:
First, you should put the axis of symetry as 5, -7 because f(x)= (x-h)^2+k and h is 5 and k is -7. the axis of symetry is x=5 because that is the "folding point" of the graph. Next, you would have to plug In 4 and 6 as your helping points to tell you where the other points of the function are going to be. 
Plug 4 in and you get -6. plug 6 in and you get -6. plot the points (4, -6) and (6,-6). 
Hope this helps!
:)
 
        
             
        
        
        
Answer:
it should be : x²= 15²+8²
x²= 225+64
x²=289
x=√289
x=17