The reason why I don’t like helping people is because sometimes when I help them they never do the same to me :(... pls just this one favor

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

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

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?