How many serve, how elected, checks and balances of each branch...?

Question

House of Reps, senate, and the supreme court (judicial review)

Answer 1

This is easy. You need to crack open your
government book and look in chapter 1.

I think this would be good for you!

Answer 2

Learn how to ask a question properly with full and complete sentences and somebody here might be willing to give you some information. Nobody is obliged to read your mind. In the meantime, I'm going to second what the person above me advised and tell you to crack a book and do some reading for yourself. If you don't know where to begin, ask your teacher for some suggestions.