Factor. x2 + 7x + 12
a. (x – 12)(x – 1)
b. (x – 6)(x – 2)
c. (x + 3)(x + 4)
d. (x – 3)(x – 4)

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?

Graph the following system of linear inequalities. identify at least two points in the solution: y < 5 - 2x | x + 5y > -7

Random variables x poisson~ ( a) ,y poisson ~ ( a) . x and y are independent. if 2 1, 2 1. u =2x+ y-1, v=2x- y +1. find: ) cov (u ,v ).