How do you do it to find the answer

What are the domain and range of f(x)=[1/5]x

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f