Answer:
x=4.8
This here you use Pythagorean Theorem. 
Step-by-step explanation:
a^2+b^2=c^2
The longest side is c. And the two legs are a and b. 
So it'd be 11^2+x^2=12^2
121+x^2=144
Subtract 121 from both sides.
x^2=23
Then take the √ of x^2 and 23
So √x^2=√23
x=4.8
Hope this helps
 
        
             
        
        
        
Answer: it’s either 5x^3 -4x^2-7x or 
-3x^3-4x^2-7x
Step-by-step explanation:
i put it in my calculator 
 
        
             
        
        
        
Answer:
128 degrees
Step-by-step explanation:
B = D
B = 128
Therefore, D = 128
 
        
                    
             
        
        
        
Answer:
28
Step-by-step explanation:
16−(−12)
=16−(−12)
=16+12
=28
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28 is your answer 
(Hope it helps)
 
        
                    
             
        
        
        
The total cost including tax would be $110, you would multiply the 100 by .10 to get your tax then add it to the 100.