If ab = 12 and a-b = 8, then the value of a2+b2

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

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

What is the best estimate of the length of a football