Vocabulary
Matrix Operations
Determinants
Inverses
Banking and Finance
100
What is a rectangular arrangement of numbers?
What is a Matrix
100
Can you add a 2 x 3 matrix and a 3 x 1 matrix? Why or why not.
What is no, they must have the same order or dimension.
100
What is a determinant?
What is a number that tells us special things about a matix
100
How do you find the inverse of a matrix?
What is 1/(det a) |d -b| |-c a|
100
If your bank offers 7% simple interest, and your principal is $4,000, how much will you have in your account after 2 years?
What is $4560.00
200
What is the identity Matrix?
What is |1 0| |0 1|
200
What is 3|2 -1| |0 3|
What is |6 -3| |0 9|
200
What is the formula to find the determinant of a 2 x 2 matrix?
What is det = ad - bc
200
How can you tell if a matrix doesn't have an inverse?
What is if its determinant equals zero
200
How does charging interest encourage banks to make loans?
What is it allows them to make a profit by lending money.
300
What is the name of a matrix withe the same number of rows and columns?
What is a square matrix
300
If you multiply a 2 x 3 and a 3 x 1 matrix what will be the order of the resulting matrix?
What is 2 x 1
300
Name one method that you can use to find the determinant of a 3 x 3 matrix
What is diagonal method or expansion of minors
300
What is the inverse of A = | 1 3| | 2 8|
What is |4 -1.5| |-1 .5|
300
How can you compare simple and compound interest?
What is compound interest is paid on the principal and accrued interest; simple interest is paid only on the principal.
400
What is the order or dimension of a matrix?
What is rows x columns
400
Multiply |3 2| and |-2 5 3| |1 0|
What is matrix multiplication is undefined
400
Do all matrices have determinants?
What is only square matrices have determinants
400
If you multiply a matrix and its inverse, what should your answer be?
What is the identity matrix
400
Name two of the three variables, or numbers, that will determine your monthly car payment
What is credit score, length of loan, or interest rate
500
What are the entries of a Matrix called?
What are the elements
500
Multiply |1 2| and |-2 3| |2 0| |1 0|
What is |0 3| |-4 6|
500
A triangle has vertices at (-2, 2), (1, 5), and (6, -1) find its area.
What is 16.5 units squared
500
Encode the message Jeopardy using the matrix |1 2| |3 4|
What is |13 24| |59 82| |27 46| |91 132|
500
What is the best way to minimize the cost of an item purchased with a credit card?
What is pay off your balance in full every month
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