Which of the following subsets of ?
A. The matrices whose entries are all integers
B. The matrices with determinant 0
C. The diagonal matrices
D. The matrices with all zeros in the second row
E. The symmetric matrices
F. The invertible matrices

Anumber cube is rolled and a coin is tossed. the number cube and the coin are fair. what is the probability that the number rolled is less than 4 and the coin toss is tails?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.