The answers please

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Find two numbers if their sum is 91 and the ratio is 6: 7?

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