At the calendar shop, wall calendars cost $7 and desk calendars cost $4. Zeke spent $47 to buy 8 calendars. How many of each type of calendar did Zeke buy?

Solve for x where 0 equation: cot^2x+2cotx+1=0

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

Can anyone me with this question?