Let W be the union of the second and fourth quadrants in the​ xy-plane. That​ is, let W= x y : xy≤0. Complete parts a and b below. a. If u is in W and c is any​ scalar, is cu in​ W? Why? A. If u= x y is in​ W, then the vector cu=c x y = cx cy is in W because (cx)(cy)=c2(xy)≤0 since xy≤0. B. If u= x y is in​ W, then the vector cu=c x y = cx cy is not in W because cxy≥0 in some cases. C. If u= x y is in​ W, then the vector cu=c x y = cx cy is in W because cxy≤0 since xy≤0.

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.

The letters g e o r g i a are placed in a bag . if you picked a card and knew it was a vowel , what is the probability that it is an a ?