Solve the system. Please help it’s my last math test of the year, I really wanna do well and will mark as Brainliest!

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

3/4 + p = 1/2? i’m not sure how to solve it

Explain how you can show five less than a number using an algebraic expression