Try to slove a 2step equation and show your work and do the check

4x-17=31

Which of the following are accepted without proof in a logical system? check all that apply.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)