Mary has 12 hair ribbons. 3 of the ribbons are red. what percent of her ribbons are red?

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Common binomial factor of 6x(3x+7)+5(3x+7)

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected