Answer:
is the expression we determine after following the steps 'Start with x and double it'.
Step-by-step explanation:
As we have to determine the expression based on a mentioned series of steps.
The series of steps:
- start with x and double it.
As the double value of x would be 2x, therefore, the required expression would be: 2x
Therefore,
is the expression we determine after following the steps 'Start with x and double it'.
The vertex is in essence the turning point of the parabola y = x²<span> − 10x + 2
the x coordinate of the turning point = </span>

=

= 5
when x = 5, y = (5)² - 10(5) + 2
= -23
Thus coordinate or vertex is ( 5, -23)