There are 142 coins in a container with a total value of $20.50. If all of the coins are either quarters (x) or nickels (y), which system of equations would you use to determine how many of each type of coin are in the container? No work is needed. Immersive Reader (1 Point)

x + y = 20.50 and .25x + .05y = 142

x + y = 20.50 and .25x + .5y = 142

x + y = 142 and .25x + .5y = 20.50

x + y = 142 and .25x + .05y = 20.50

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?