The Jaccard similarity is an often used measure for collaborative filtering.

9.4; Combine like terms. ( 5 – 3i ) – ( 2 – 7i )

5.7; Use long division to perform each division. x 2   –   5 x   +   6 x   –   2

8.6; Solve 4 x   –   3   –   3   =   4

8.6; Solve 2 x   +   8   =   x   +   4

9.5; Solve the quadratic equation (x – 4) ( x + 1) = 6

Anita is Factoring the Polynomial 2×3 – x2 -10x + 5. She decides to Factor by Grouping.  She groups 2×3 – x2 in the first set. She groups -10x +5 together in the second set.  What is the GCF of the first set?

What tip did the professor provide about Factoring Using Trial and Error during lecture on Wednesday, July 9?

When Factoring Trinomials, if the middle term is negative and the constant term/last term is also negative, then the trinomial factors as a binomial with 2 negative signs. 

Under Destination Sequenced Distance Vector (DSDV) routing, a path from node S to node D, (S — X — Y — D), is discovered. The current sequence number of D is 102. After a while, node D generates a periodic update message. What is a plausible sequence number of D in the update message?