Answer:
Step-by-step explanation:
B + 87 +78 +66 = 360
B = 129 °
the angle next to B then is
180 = 129 + b '
51 °  = b '
A  + 61 + b ' = 180
A = 68 °
 
        
             
        
        
        
Answer:
Step-by-step explanation:
4.50 divides by 5 than times the answer by 7
 
        
                    
             
        
        
        
Answer:
-30
Step-by-step explanation:
I'm assuming the equation is  . If it is not please tell me.
. If it is not please tell me.
If we know the values of m and n, we can just substitute inside the expression.

Hope this helped!
 
        
             
        
        
        
Answer:
B)  12.5 ft
Step-by-step explanation:
set up a proportion of inches/feet equals inches/feet
let 'h' = height of sign
5.4/18 = 3.75/h
cross-multiply:
5.4h = 67.5
h = 12.5