Which of the following matrices has an inverse?
a. -6 3

b. 4 -2 1

c. 6 -9 2 1

d. -3 5 1 4 -6 0

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Which statement about the graph of y = 8(0.25)^2

Find the values of y: 3y^3(y^2+ 2/3y)=0