Which of the following expressions are equivalent? Why? If an expression has no match, write two equivalent expressions to match it.
a. 2(x + 4)
b. 8 + 2x
c. 2x + 4
d. 3(x + 4) - (4 + x)
e. x + 4

Factor the following expression completely 6x^11-24x^7

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?

Suppose you are analyzing the relationship between time and distance given in a table,and there are 4 values for each quantity.you divide distance 2 minus distance 1 by time 2 minus time 1.you then divide distance 4 minus distance 3 by time 4 minus time 3 and get a different answer.what can you say about the relationship?