Is (2,3) (4,5) (2,8) a function?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar