Lissette's age is 3 years less than twice the age of her sister Francesca. Lissette is 13. Write an equation that can be used to find Francescas age, f.

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