What percentage is 1000 people of current human population(7.8 billion people)?

2/3(-6y+9x) expand each expression using the distributive property

(x-5)1/2+5=2 what is a possible solution?

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.