math_cryptography.jpg

Suppose A,B, and C are matrices.  0 is the zero matrix and I is an identity matrix. (Assume each matrix is a 2×2 matrix). Select each matrix property below that is true. 

Read all questions carefully and provide the correct answer.  Regardless of the instructions- you can NOT leave the exam and complete it later. If you leave the exam, your time will expire.If the exam”crashes”, log back in and finish. I have it set to save your answers.  You are allowed a 2nd attempt on exams, but this is only beneficial if you take your first attempt several hours before the deadline. (Watch carefully for negative signs(-).They are rather small in some problems,but they are visible.) If it takes you longer than the time allowed to complete this exam,you did not properly prepare.I do not allow for time for students to search far and wide on how to solve a problem.Just because you are allowed to use notes does not mean you can afford time to dig through notes,text and other resources.

Let A=2  41-1 . Find it’s inverse, A-1=abcd  by selecting each value of the inverse below. a=[BLANK-1] , b=[BLANK-2], c=[BLANK-3],  d=[BLANK-4]

When solving a system of linear equations by graphing, we look for the [BLANK-1] of the graphs. If there is only one solution to the system, we call the system a consistent and [BLANK-2] system. If there is no solution, we call it a(n) [BLANK-3] system. When there are infinitely many solutions, this is an example of a consistent and [BLANK-4] system. 

Select each operation that is UNDEFINED. (Choose all that apply) Let A=102315  , B=132465 , C=121-1-2-3223 , D=20-102 3 

Consider the given system.4x + 4y + 4z = 412x + 13y + 14z = 158x + 9y + 10z = 11 This system is a(n) [BLANK-1] system and has [BLANK-2] solution(s). The solution for the system is [BLANK-3].

Find the equilibrium point for the given demand and supply functions. Here p represents price and q represents quantity.p = -1.7q + 15 (demand)p = 0.7q + 3 (supply) Find the equilibrum quantity (q). [BLANK-1] units (Round to nearest whole number) Find the equilibrium price (p). $[BLANK-2] (Do not enter the $ sign. Round to nearest cent.)

Perform the row operation [ 3R1 + R2 → R2 ] on the given augmented matrix:   

A random variable is a function from the sample space to the real numbers. Which of the following random variables were never mentioned in class?