The performing arts department put in its spring show on friday and saturday nights. the price of a ticket was the same both nights. the department made a profit of 400 on friday when 100 people bought tickets, and 500 on saturday when 120 people bought tickets. how much did one ticket cost? what was the cost of putting on the show?

2-digit numbers less than 91 which are 1 less than a multiple of 10

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

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?