Alocal hamburger shop sold a combined total of 237 hamburgers and cheeseburgers. the number of cheeseburgers sold was two times the number of hamburgers sold. how many hamburgers were sold

Which of these choices show a pair of equivalent expressions?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.