What is the answer to the last question?

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

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