Please answer these u can answer one of them if u want i just need help

(05.08a)triangle abc is transformed to similar triangle a′b′c′ below: a coordinate plane is shown. triangle abc has vertices a at 2 comma 6, b at 2 comma 4, and c at 4 comma 4. triangle a prime b prime c prime has vertices a prime at 1 comma 3, b prime at 1 comma 2, and c prime at 2 comma 2. what is the scale factor of dilation? 1 over 2 1 over 3 1 over 4 1 over 5

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8