What percent of 50 is 30? use as a fraction . show all your work.

What situation is an example of an observational study

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42