Consider the linear homogeneous system x? = p11(t)x + p12(t)y, y? = p21(t)x + p22(t)y. Show that if x = x1(t), y = y1(t) and x = x2(t), y = y2(t) are two solutions of the given system, then x = c1x1(t) + c2x2(t), y = c1y1(t) + c2y2(t) is also a solution for any constants c1 and c2. This is the principle of superposition.

You can model the population of a certain city between 1955-2000 by the radical function p(x)=55,000 sqrt x-1945. using this model, in which year was the population of that city 220,000

What are the relative frequencies to the nearest hundredth of the columns of the two-way table? a b group 1 102 34 group 2 18 14

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.