Question 126218
Lets look at the formula and the steps to solve it.  Remember to use the proper order of operations P E M D A S .

{{{y=(9*x^2-5*x-5)}}}
 When x is 4

1.  substitute 4 into the equation for each of your x variables.

     {{{y=(9*4^2-5*4-5)}}}

2.  Following the order of operations,  take 4 to the 2nd power (Exponents)

     {{{y=(9*16-5*4-5)}}}

3.  Following the order of operations, simplify any multiplication
     {{{y=(144-20-5)}}}

4.  Following the order of operations, do any addition or subtraction that
    is necessary
     {{{y=(124-5)}}}
     {{{y=(119)}}}

So your answer is correct.  The trick to getting the correct answer is to watch your order of operations, which you did.  Great Job!