Susan has $15 gift certificate to use at her favorite clothing store. she chooses a t-shirt that cost $5.78, a pair of jeans that cost $19.87, and a jacket that cost $24.99.
if she uses her gift certificate, how much money will susan need to pay?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18

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.