Linear relationships

Maths

Fill in the gaps: The "n" in the nth term represents the ____.

Which sequence is formed as a result of adding -3n + 11 and 2n + 1 together?

Which sequence is formed as a result of subtracting 2n + 11 from -3n + 11?

Which sequence is formed as a result of adding "4, 9, 14, 19, ..." and "12, 8, 4, 0, ..." together?

Which sequence is formed as a result of subtracting "4, 9, 14, 19, ..." from "12, 8, 4, 0, ..."?

Which equation is equivalent to 3x - 2 = 4?

Which equation is equivalent to 4x - 2 = 8?

Which equation is equivalent to 3x - 2.5 = 5?