Answer:
144 units 
Step-by-step explanation:
3x + 8 + 4x + 10 = 8x
7x + 18 = 8x
8x - 7x = 18
x = 18
8x is length of BC
8 × 18 is length of BC
144 units
 
        
             
        
        
        
Answer:
hello : 
Step-by-step explanation:
the area of a circle is : A = π r²       r : the radius 
A = π (6)² = 36π (ft)² ........( answer : C)
 
        
             
        
        
        
Your answer is x = 7b/4m + y/4m
        
             
        
        
        
ANSWER

EXPLANATION
First equation: 

Second equation:

Let us equate the two equations and solve for x.
This implies that;

Group similar terms to obtain:

Simplify:

Divide both sides by 3

Put x=-2 into any of the equations.
I will put x=-2 into the first equation:

This implies that,
