Allen's work is not written properly so I have rearranged it as shown below:
Original problem) –8.3 + 9.2 – 4.4 + 3.7. 
Step 1) −8.3 + 9.2 + 4.4 + 3.7 Additive inverse 
Step 2) −8.3 + 4.4 + 9.2 + 3.7 Commutative property 
Step 3) −8.3 + (4.4 + 9.2 + 3.7) Associative property 
Step 4) −8.3 + 17.3 
We can see that in step 1), Allen changed -4.4 into +4.4 using additive inverse. Notice that we are simplifying not eliminating -4.4 as we do in solving some equation. Hence using additive inverse is the wrong step.
Alen should have collect negative numbers together and positive numbers together.
Add the respective numbers then proceed to get the answer.
–8.3 + 9.2 – 4.4 + 3.7
= –8.3 – 4.4 + 9.2 + 3.7
= -12.7 + 12.9
= 0.2
 
        
                    
             
        
        
        
You have to include a drawing that relates the distace between de towers and some angles.
I will use one that gives the angle from the base of Seafirst Tower to the top of Columbia tower as 53 degress.
This lets you calculate the distance between the towers, d, as
tan(53) = 954 / d => d = 954 / tan(53) = 718.89ft
The same drawing gives the angle from the the base of the Columbtia tower to the top of the Seafirst Tower as 27 degrees.
Tnen, tan(27) = height / d => height = d*tan(27) = 718.89*tan(27) = 366.29 ft
Answer: 366.29 ft 
        
             
        
        
        
Answer:
245
Step-by-step explanation:
35                    x
-------             --------
100               700
then you cross multipy and you get 
24500
------------------
100
cross out the zeros
and get 245
 
        
             
        
        
        
Solution:
we are given that 
If G is the midpoint of FH,  it mean that 

we are also given that 

So we can write 

So 
 
        
             
        
        
        
This problem has been solved! See the answer Determine Um (mode ), average U, and Urms for a group of ten automobiles clocked by radar at speeds 38,44,48,50,55,55,57,58 and 60mi/h respectively