Find the amount of sap the maple syrup producer would have collected from each tree if the total amount (5 gallons ) was redistributed equally among the trees

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

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

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?