Geometry proving triangles congruent maze . plz

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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?

Would greatly appreciate these 3 answers