What is the value of y?
A. 60
B. 30
C. 40
D. 120

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?