Determine the domain and range of the relation {(3, 8), (3, 2), (5, 2), (6, 1), (9,1)}

I don't understood domain and range. Help please.

Ingredient c: 1/4 cup for 2/3 serving or ingredient d: 1/3 cup for 3/4 serving which unit rate is smaller

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample

Which statement about 6x2 + 7x – 10 is true?