This is what it says...I use and I don't know how to send or accept friend requests so if you guys know then please help(in the picture it's someone else profile so when I click this is what it shows)and help me with my question too about maths.9x-5=18

On a production possibility curve, data points that fall outside of the curve represent what

Can i have all the nicknames of all 50 states of usa?

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling