John is having an exam with questions that require many answers. the exam has 20 questions. for every correct answer he gets 5 points and for every mistake he loses 2 points. john answers all of questions and in the end he receives 51 points.*how many correct answers are there? *

Will give brainliest! aubrey was offered a job that paid a salary of $45,000 in its first year. the salary was set to increase by 2% per year every year. if aubrey worked at the job for 20 years, what was the total amount of money earned over the 20 years, to the nearest whole number?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

If the value of cos330°is√3/2 then find cos 165°.