Shanda has a job which pays her an hourly rate each week plus a bonus each time she makes a sale. Last week, Shanda made 15 sales and earned $80 in hourly pay. This week, she made 22 sales and earned $31 in hourly pay. If Shanda was paid the same amount for both weeks, how much was the bonus for each sale?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Which one ? is the answer and how to find this answer

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.