−1 7/9 is the same as the sum of −2 5/6 and 1/3 times a number. What is the number? Enter your answer as a mixed number in simplest form in the box. The number is .

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample