Is y=6|x|-5 a function

What number should be added to both sides of the equation to complete this square? x^2-10x=7

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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