How many different messages can be transmitted in n microseconds using three different signals if one signal requires 1 microsecond for transmittal and the other two signals require 2 microseconds each for transmittal. Signals in a message immediately follow one another. Note: Your final solution must not be in the form of a recurrence relation. Hint: The empty message is still considered a message.

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $