Answer: -b - 9
Step-by-step explanation:
First, since the a cancel eachother out we are left with (4-b) + (-6-7)
Second, you want to add the -6 and -7 to get -13, so (4-b) - 13
Finally, add the 4 to the negative 13 to get (-b - 9)
Hope this helps. 
 
        
             
        
        
        
Okay, so YZ = 3 cm.  You have XM correct. And YM = 0.5.
Now, you have the midpoint M at the correct spot.
Use Pythagorean's theorem o find the length of AB.  a² + b² = c²   a=6,  b=8.
6² = 36   8² = 64    36 + 64 = 100      AB = 10!
If AB = 10   then AM = 5    MB also = 5
If B is the midpoint of AC,  C would be 12 rows down from A, and 16 columns to the right. The last spot where the line intersects.
There are your answers!
 
        
             
        
        
        
Answer:
4
Step-by-step explanation:
Since the highest power of x is 4 in this case. 
 
        
             
        
        
        
Answer:

This is a genuine statement of you look real closely at it.
I am joyous to assist you anytime.
 
        
             
        
        
        
Answer:
a-10 - 6/a+2
Step-by-step explanation: