What is the reason for statement 3, statement 5, statement 7?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

What is r i 4.5+10r=-6.5 with work pls

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000