What does 3x 12-xy-4y equal?

Is 83 a even or odd number? What is the face value of the digit 3 in 20312? How many units in 12 mg? What are the rules of significant digits? How many days are there in 150 weeks? How do you find the square footage of a window? Where does the number four appear in the Bible? How could you tell if a figure is symmetric? Why are 1 3 4 6 7 and 10 key football numbers? A map scale is 1 inches 50 miles two cities are 450 miles apart how far apart are the cities on the map? What is 6 divide 2 (2 plus 1)? Which variable is dependent in a given set axes? How much would a 2-liter bottle full of nickels be worth? What is a Fraction with a numerator greater than the denominator? What is the estimate of 2 and 4 over 5? Is the number zero a rational number? How do you write 2.0 as a percentage and simplified fraction? Is it true that 95 percent of the body is water? What does the sum of somthing mean? How many inches are in 5 and 1 half feet?