Answer:
C. 
Step-by-step explanation:
Given the two equations:

To find:
The correct option when value of y is substituted to 2nd equation using the 1st equation.
Solution:
First of all, let us learn about the substitution method.
Substitution method is the method to provide solutions to two variables when we have two equations and two variables.
In substitution method, we find the value of one variable in terms of the other variable and put this value in the other equation.
Now, the other equation becomes only single variable and then we solve for the variable's value.
Here, we have two equations and value of one varible is:

Let us put value of y in 2nd equation:

So, the correct answer is option C. 
Answer: 6, 5
Step-by-step explanation:
There are six (6) different sandwiches available.
They are:
-- egg salad on pita
-- egg salad on baguette
-- chicken salad on pita
-- chicken salad on baguette
-- falafel on pita
-- falafel on baguette .
Some sound more appetizing than others,
but the math is bullet-proof.
25/-5(-5)
25/25
0
the answer is 0
(5, -2) because y=(x-5)^2-2 is really y=x^2-10x+23 after you foil then take the derivative which is y'=2x-10 solve for x and you get 5 then put 5 in the original equation and you get -2 so the answer is (5, -2)<span />