Using pythagorean's theorem
a^2+b^2=c^2
a being 3 
b being 4
we'll get
9+16=25
where 5 is the hypotenuse and also c.
c^2 = 5^2
        
             
        
        
        
Answer:
41 21/25
Step-by-step explanation:
38 1/25 + 3 4/5 = 41 21/25
 
        
                    
             
        
        
        
Answer:
12
Step-by-step explanation:
This can be solved by working backwards.
7 is one more than half the number of invitations.
Subtract 1.  6 is half the number of invitations.
Double.
12 is the full number of invitations.
Algebra (if you must!):
x = number of invitations
x/2 + 1 = 7
Subtract 1.
x/2 = 6
Multiply by 2.
x = 12
 
        
                    
             
        
        
        
Answer:
9,000 x 40 = 360,000
Step-by-step explanation:
9,000 x 40 = 360,000
A one nonzero digit is a number that has only one number that's not 0. For example, 300 has only one nonzero digit.
Hope this helps!
 
        
             
        
        
        
Answer:
see step by step 
Step-by-step explanation:
sqrt 49
sqrt 64
sqrt 81
sqrt 100
perfect squares are always rational numbers because when solving any of these square roots they make whole numbers.