16x^4-81y^4  difference of perfect squares...
(4x^2-9y^2)(4x^2+9y^2)  that's one of the equivalents...
(2x+3y)(2x-3y)(4x^2+9y^2)  that's another one of them...
        
             
        
        
        
Answer:
41 21/25
Step-by-step explanation:
38 1/25 + 3 4/5 = 41 21/25
 
        
                    
             
        
        
        
Answer:
whatpower7(49) = 2
Step-by-step explanation:
given data  
WhatPower7(49)
to find out
Evaluate the expressions WhatPower7(49)
solution
as we know that whatpower mean exponent of equation so we get by given equation  
we know whatpower7(49) = 2
because  
we know that  7 × 7 = 49  
so that 7² = 49
so that  the exponent  is here 2 for 7 that become 49
so correct answer is 2 
 
        
             
        
        
        
Answer:
 okokok
Step-by-step explanation:
 
        
             
        
        
        
<u><em>Answer:</em></u>
The bird will have traveled 403 meters in 13 seconds if it maintained a speed of 31 m/sec
<u><em>Explanation:</em></u>
<u>The equation that relates velocity, distance and time is:</u>

<u>This means that:</u>
distance = velocity * time
<u>In the given, we have:</u>
velocity = 31 m/sec
time = 13 sec
<u>Substitute with the givens in the above equation and solve for the distance as follows:</u>
distance = velocity * time
distance = 31 * 13
distance = 403 meters
Hope this helps :)