What is the value of x and both angle measures? Explanation + Answer please

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

What’s -11-33k and factor each expression completely