I don't understand how to solve Sequence dots? Can you show me step by step how to solve the first one A?

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?