Please help with this im desperate (that prolly made me sound bad)

Find the measures of the complement and the supplement of each angle, m

[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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.