Answer:
50°
Step-by-step explanation:
I am assuming that the shape is a right triangle. 
All interior angles of a triangle add up to 180°.

The missing angle should be 50°.
Hope this helps.
 
        
                    
             
        
        
        
For this case we have the following subtraction:

 We can rewrite the subtraction in an easier way.
 We have then:
 
 Then, by doing associative property we have:
 
 Answer:
 The value of the subtraction is given by:
 
 
        
                    
             
        
        
        
Your answer is 4 
You have to use the distribute property and distribute the - to the -7 and the 3 
The -7 will become and the 3 will become -3
Then you add those together and when you add a negative to a positive you basically subtract
So 7+-3 is 4
A is your answer
        
             
        
        
        
Answer:
the amount of space a 3-dimensional object takes up
Step-by-step explanation:
Of the four definition options, the first is the only only that incorporates a three dimension explanation.  The others only describe a two dimension object.  Units for the first would be unit^3.  The other three would only be one-dimensional "units."
 
        
             
        
        
        
I don't know the answer I'm just answering some thing so that Brinley will let me ask a question. Hope this helps LOL