98 people get $30 per hour, and 11 get an additional $15 per hour. Then the total payroll per hour is
.. $(98*30 +11*15) = $3105
So, the payroll for a 40-hour week is
.. 40*$3105 = $124,200
Replace x with 3 and solve:
10 x 5^3
Simplify:
10 x 125 = 1250
Answer: y = 1250
In your situation you said that
Putting those together, you'd have
because
.
To evaluate the difference quotient, first find each piece on it's own:
because
no matter what your x-value is.
So putting those together:

Remember that the difference quotient is basically finding the slope of something. Since you were given that the slope is 0, the difference quotient should work out to match that.
Line the decimal points up. Then add like you normally would, but put down the decimal directly where you have it lined up.