Answer:
hope it helps...
Step-by-step explanation:
The value of the constant of proportionality is k=5k=5
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form y/x=ky/x=k or y=kxy=kx
The value of the constant k is equal to the value of the slope
In this problem we have
y=5xy=5x ------> is a linear direct variation
The slope is m=5m=5
therefore
The value of the constant of proportionality is k=5k=5
 
        
             
        
        
        
Answer:
x=16
Step-by-step explanation:
50+40=90
40-8=32
32/2=16
x=16
 
        
                    
             
        
        
        
Incorrect.
Go through the numbers and you'll find un-prime numbers ending in 1:
21, 81, 121,...