Find the missing term of the following sequence ...-34, _, 77, ...

I'm confused on this could anyone me and show me what i need to do to solve it.

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?

What graph shows the system of linear equations for which (-3/2,0) is a solution