The given expression is equivalent to price is $7 option first is correct.
<h3>What is a quadratic expression?</h3>
A quadratic expression is a second-degree algebraic expression represented by the:
........(1)
Where a, b, and c are the constants and
We have a quadratic expression:
Convert it to perfect square by perfect square trinomial:
(adding and subtracting by 49)
Here is the positive term and -2 is the negative term so in order to get the highest weekly profit it should be zero, so
x = $7
Thus, the given expression is equivalent to and the price is $7.
Learn more about quadratic expression here:
brainly.com/question/2263981