Helen subtracted 17 from the right side of the equation when she should have added 17. Adding 17 to both sides would have gotten x/y by itself.
The answer is 'Helen should have added 17 to both sides of the equation'.
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Let's find the answer by using the arc length formula which is:

First, let's find dy/dx which is:
y=4x-5
y'=4*(1)-0
y'=4, now let's use the formula:

Now, using the distance formula we have:


So we have two points (-1, -9) and (3, 7) so:

Notice both equations gave the same length  .
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We need to multiply the factors (x - 2) and (x^2 + 9x + 10) to see if the product is the original expression given. 
(x - 2)(x^2 + 9x + 10)
x^3 + 9x^2 + 10x - 2x^2 - 18x - 20
x^3 + 7x^2 - 8x - 20.
Since the product just found is not the original expression given, Jimmy is wrong.
I will complete the work on paper by synthetic division and post my answer. 
After using synthetic division, the correct quotient is x^2 + 9x + 20.
        
             
        
        
        
Answer:
The value of c is 12.25
Step-by-step explanation:
we know that
 A perfect square trinomial is of the form

In this problem we have

so
equate the equations

we have 
the following equations
 -----> equation A
 -----> equation A 
and
  -----> equation B
 -----> equation B
<u>Solve the equation A</u>



<u>Solve the equation B</u>
 
 
therefore

The value of c is 12.25
 
        
                    
             
        
        
        
Answer:y=1
Step-by-step explanation: