On monday, 350 people bought tickets to the county fair. tickets cost $7 for
adults and $3 for children. the total revenue from ticket sales on monday
was $2050. the system of equations below represents the number of people
and total sales for the county fair on monday, where x represents the number
of child tickets and y represents the number of adult tickets.
x+y = 350
3x + 7y = 2050
how many adult tickets were sold on monday?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0