I need help on these two please

What is the first step of an indirect proof of a number that is divisible by two

Describe the domain and range of y=2(3)^x-2+5

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students