What rule can you make about the order of addends in an additition sentence

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

[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