Answer:
C
Step-by-step explanation:
I think because there is no space or a sign in-between the f and 5, which means you multiply.
Be just a bit clearer, please: "find the vertex."
You could either "complete the square" or use the "quadratic formula."
Here the coefficients are a=-1, b=11 and c=-18. Because a is -, the curve opens downward and the vertex is on top, representing the function's maximum.
Use the quadratic formula with the coefficients given above.
-b plus or minus sqrt(b^2-4ac)
x = -------------------------------------------
2a
Answer:
x -----> x+1
y -----> y+2
Use this relationship to find the new coordinates
Since the tax is 6.25%, make it into a decimal which is .0625 then multiply by 600 to get 37.5, then add it to the 600 and the answer is .... $637.5 Yw (: