In a bag of oranges, the ratio of the good ones to the bad ones is 5: 4. if the number of bad ones in the bag is 36, how many oranges are there altogether?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

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?