My thoughts. (dont judge)

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

How do you solving the solution of each system using elimination?

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.