Simplify -3xy 3 + 7xy 3 + (-xy 3) + (-3xy 3).

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

What is the slope of the line that contains the points (-2,1) and (0,-3)

50 points~ ! i have to turn this in tomarrow