Rob is looking into a new cell phone plan to see if he could save money. plan a which he already has consists of a $45 fee for all cell phone calls made in a month and $.30 per text message sent. plan b which rob is looking to switch to consists of a $60 fee for all cell phone calls made in a month and $.25 per text message sent. he wants to spend a total of $150. using the variable t to represent the number of text messages sent, create two equations for plan a and plan b.

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?