Let vector De be the vector with initial point D(-13, -6) and terminal point E (-1, 14). Write vector De as a linear combination of the vectors i and j.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?