Please help me with this maths

What value of x will make the triangles similar by the sss similarity theorem?

How do i put 3(x+7) in distributive property

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.