How many rectangles of any size are in the diagram?

Which of the following are accepted without proof in a logical system? check all that apply.

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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