The value of x is 
-4x + 8 = 42
-4x = 42 -8
-4x = 34
x = -8,5
        
             
        
        
        
Answer:
z=6
Step-by-step explanation:
987/z=164.5
multiply both sides by z
 
        
             
        
        
        
Answer:
   A. About 4,900 ft
Step-by-step explanation:
We want h such that ...
   5 = 10·ln(h) -80
   8.5 = ln(h) . . . . . . . add 80, divide by 10
   e^8.5 = h ≈ 4914.8 . . . . take the antilog
   h ≈ 4900 . . . . feet
 
        
             
        
        
        
38-13=25 more secs. bc ur just dealing with the sec. not min so... just subtract