Select each equation that is true. 7n + (n - 6) -8+ (8n - 14)
(9a - b)+(a - b) = 10a
(52 - 9) + (22+4) - 32 - 4 - 5
(-3,- m) + (-m+24) – (-2m - ) -
0 (-0.8n +1.2)+(-2n - 4.2) + (1.2n -0.9) = (-5 -0.872) + (1.1 -0.8n)

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