Which value must be added to the expression x2 - 3x to make it a perfect-square trinomial?
a. 3/2
b. 9/4
c.6
d.9

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Y=21.95x+10 y=22.45x solve by substitution