Answer:
500
Step-by-step explanation:
50 divided by 10 is 9
ANSWER
The vertex is (1,-3)
EXPLANATION
The given parabola has equation:

We group the variables to obtain:

We complete the square to get,



The vertex is of the parabola is (1,-3)
Answer: SAS (Side, angle, side)
Explanation: The two triangles indicate two sides and one angle is congruent, therefore SAS can be applied. Hope this helps :)