Two thirds is equal to 66.666666 etc. percent so 64 is pretty close to 66 so I would consider it right.
Answer:

Step-by-step explanation:
we know that
The equation of a vertical parabola into vertex form is equal to

where (h,k) is the vertex of the parabola
The axis of symmetry is equal to

In this problem the parabola open upward
so
the coefficient a is positive
The coordinates of the vertex will be
(the y-coordinate is negative)
so
the equation will be of the form

Attached below is a step by step process of arriving at the answer.
0.0909090909 Is the answer my friend plz mark brainliest
Answer:
c= -2/3
Step-by-step explanation:
c+8 = -11c
C = -11c -8
c+11c = -8
12c = -8
divide both sides by 12
c= -2/3