Geometry help please??

Write two subtraction equations that are equivalent to 5 + 12 = 17.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.