Bag of flour weigh 1 1/2 kilograms what is the weight of 20 bags

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

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

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.