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)
The marks are by 1 so just count
Answer:
They are congruent
Step-by-step explanation:
They both have the sides with 15 and 12, and if you rotate it a bit it will look exactly the same.
Answer:
i think it d
Step-by-step explanation:
C= 45
All interior angles of a triangle add to 180. 90+45=135. 180-35=45
a= 45
The top angle of the triangle and a make 90 degrees together. 90-45=45
b= 135
Angle a and b together make 180 (they are supplementary). 180-45=135