Answer:
b=12
Step-by-step explanation:
Perimeter=2*(l+b)
64=2*(20+b)
b=12
 
        
                    
             
        
        
        
Answer:
x+y-13
Step-by-step explanation:
A polynomial with three terms is called a trinomial.
rate brainliest if very helpful
 
        
             
        
        
        
<h3>
Answer:  They're all the same</h3>
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Reason:
 means we have 6 copies of "2" multiplied out as shown in choice B. That explains how A and B are the same, and we can say
 means we have 6 copies of "2" multiplied out as shown in choice B. That explains how A and B are the same, and we can say
 
The parenthesis are optional, but I find they're handy to count the '2's easier.
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Now notice that 

So,

The last step is possible because we have two copies of  multiplied together.
 multiplied together.
This shows that choice C is equivalent to A and B.
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Lastly,

The jump to the last step is possible because we have three copies of  multiplied together.
 multiplied together. 
This shows choice D is equivalent to the others. 
All four expressions are the same.
They represent different ways to say the same number. That number being 64.
 
        
        
        
Answer:
<YXZ and <TUS
Step-by-step explanation:
An exterior angle is found outside the parallel line. When you have two exterior angles that are opposite each other along the transversal, they are referred to as alternate exterior angles.
Therefore, the only pair of angles from the given options that flare alternate exterior angles are:
<YXZ and <TUS