Answer: <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>
Step-by-step explanation:
The equation  can be solved by squaring both sides:
 can be solved by squaring both sides:

We can see that -1 and 7 are solutions, but make sure they are not extraneous by substituting them in the original equation:

The square root of 49 equals 7, but the square root of -1 is an imaginary number. 
The correct choice is <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>
 
        
             
        
        
        
A quotient of a number 21 is 3 and 63
Hope this helps!
        
             
        
        
        
Answer:
   0.25
Step-by-step explanation:
The only constant in the equation is called the "constant of proportionality." Its value is 0.25.
The constant of proportionality is 0.25.
____
In an equation of the form ...
   y = kx
the constant k is called the <em>constant of proportionality</em>. It's a vocabulary (naming) question.
 
        
             
        
        
        
.059, you move the decimal point two times to the left and the other way around when you want to convert into a percent
 
        
             
        
        
        
Last one should be less than 3/4