Which expression represents the number of feet that are in x yards?

What is this inequality notation? t is less then or equal to 2

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6

Asequence is a function whose is the set of natural numbers