Question 1

Provide an appropriate response.
-Solve the linear system corresponding to the following augmented matrix:

Accepted Answer

The answer of Provide an appropriate response.
-Solve the linear system...

Question 2

Solve the problem.
-Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The income from the 5% and 6% investments is the same as the income
From the 8% investment. Find the amount invested at each rate.

Accepted Answer

A)  $10,000 at 5%, $10,000 at 6%, $5000 at 8% 
B)  $10,000 at 5%, $5000 at 6%, $10,000 at 8% 
C)  $8000 at 5%, $10,000 at 6%, $7000 at 8% 
D)  $5000 at 5%, $10,000 at 6%, $10,000 at 8% 
A)  $10,000 at 5%, $10,000 at 6%, $5000 at 8% 
B)  $10,000 at 5%, $5000 at 6%, $10,000 at 8% 
C)  $8000 at 5%, $10,000 at 6%, $7000 at 8% 
D)  $5000 at 5%, $10,000 at 6%, $10,000 at 8%

Question 3

User row operations to change the matrix to reduced form.
-

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 4

Find the system of equations to model the problem. DO NOT SOLVE THIS SYSTEM.
-Hurst's Feed & Seed sold to one customer 5 bushels of wheat, 2 of corn, and 3 of rye, for $31.00. To another customer he sold 2 bushels of wheat, 3 of corn, and 5 of rye, for $27.60. To a third customer he sold 3 bushels of wheat, 5 of corn, and
2 of rye for $32.70. What was the price per bushel for each of the different grains?
Let x represent the price per bushel for wheat, y the price per bushel for corn, and z the price per bushel for rye.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 5

Solve the problem.
-Your screen print operation is doing extremely well at the craft shows. Last week you sold 50 tie-dyed shirts for $15 each, 40 Cheraw-Tech crew shirts for $10 each and 30 handpainted T-shirts for $12 each. Use matrix
Operations to calculate your total revenue for the week.

Accepted Answer

A)  $1480 
B)  $1510 
C)  $1151 
D)  $1750 
A)  $1480 
B)  $1510 
C)  $1151 
D)  $1750

Question 6

Perform the operation, if possible.
-Let A =   an ad B =   . Fi. Fnd AB.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 7

Solve the system of equations by graphing.
-

Accepted Answer

A)  (-2, -1) 
B)  (-1, -2) 
C)  (2, 1) 
D)  no solution 
A)  (-2, -1) 
B)  (-1, -2) 
C)  (2, 1) 
D)  no solution

Question 8

Solve the problem.
-A company that manufactures laser printers for computers has monthly fixed costs of sts of $177,000 and variable
costs of f $650 per unit produced. The company sells the printers for s for $1,250 per uni per unt. How many printers must be
sold each month for the company to break even?

Accepted Answer

The answer of Solve the problem.
-A company that manufactures laser...

Question 9

Perform the indicated row operations on the following matrix.  
-

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 10

Identify the row operation that produces the resulting matrix.
-

Accepted Answer

A)    1 
B)    1 
C)    
D)    
A)    1 
B)    1 
C)    
D)

Question 11

Solve the problem.
-Given the technology matrix M and the final demand matrix D stated below, find (I - M)-1 and find the output
matrix X.

Accepted Answer

The answer of Solve the problem.
-Given the technology matrix M...

Question 12

Find the system of equations to model the problem. DO NOT SOLVE THIS SYSTEM.
-If $9,000 is to be invested, part at 13% and the rest at 8% simple interest, how much should be invested at each
rate so that the total annual return will be the same as $9,000 invested at 9%? Set up a system of linear
equations, letting x1 be the amount invested at 13% and t 13% and   be the amount invested at 8%.

Accepted Answer

The answer of Find the system of equations to model...

Question 13

Perform the operation, if possible.
-Let B = -1 6 7 -3 . Find -2B.

Accepted Answer

A)  2 -12 -14 6 
B)  -3 4 5 -5 
C)  -2 12 14 -6 
D)  2 6 7 -3 
A)  2 -12 -14 6 
B)  -3 4 5 -5 
C)  -2 12 14 -6 
D)  2 6 7 -3

Question 14

Provide an appropriate response.
-Use the augmented matrix to solve the system:

Accepted Answer

A)  (-0.1, -0.5) 
B)  (0, 0) 
C)  (-1, -5) 
D)  (-5, -1) 
A)  (-0.1, -0.5) 
B)  (0, 0) 
C)  (-1, -5) 
D)  (-5, -1)

Question 15

Find the inverse, if it exists, of the given matrix.
-

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

Provide an appropriate response.
-Use a graphing utility and augmented matrix methods to solve the system:   Express your answer accurate to three decimal places.

Accepted Answer

The answer of Provide an appropriate response.
-Use a graphing utility...

Question 17

Solve using Gauss-Jordan elimination.
-

Accepted Answer

A)  (-5, -6) 
B)  (-6, -5) 
C)  (6, -6) 
D)  (5, -5) 
A)  (-5, -6) 
B)  (-6, -5) 
C)  (6, -6) 
D)  (5, -5)

Question 18

Solve the system of equations by graphing.
-

Accepted Answer

A)  (6, -1) 
B)  (-1, 6) 
C)  (1, -6) 
D)  no solution 
A)  (6, -1) 
B)  (-1, 6) 
C)  (1, -6) 
D)  no solution

Question 19

Use the given encoding matrix A to solve the problem.
-A message has been encoded and the matrix which the receiver gets is shown below.   The encoding matrix A which was used to encode the message is:   Find the decoding matrix x A   , and use it to decode , and use it to decode the message. Assume that the numerical assignment used was was a   26, spac spae = 30, period = 40, and apostrophe =
60.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 20

Perform the operation, if possible.
-Let A =   an ad B =   . . Find A + B.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Provide an appropriate response. -Solve the linear system corresponding to the following augmented matrix:

Solve the problem. -Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The income from the 5% and 6% investments is the same as the income From the 8% investment. Find the amount invested at each rate.

User row operations to change the matrix to reduced form. -

Solve the problem. -Your screen print operation is doing extremely well at the craft shows. Last week you sold 50 tie-dyed shirts for $15 each, 40 Cheraw-Tech crew shirts for $10 each and 30 handpainted T-shirts for $12 each. Use matrix Operations to calculate your total revenue for the week.

Perform the operation, if possible. -Let A = an ad B = . Fi. Fnd AB.

Solve the system of equations by graphing. -

Perform the indicated row operations on the following matrix. -

Identify the row operation that produces the resulting matrix. -

Solve the problem. -Given the technology matrix M and the final demand matrix D stated below, find (I - M)-1 and find the output matrix X.

Perform the operation, if possible. -Let B = -1 6 7 -3 . Find -2B.

Provide an appropriate response. -Use the augmented matrix to solve the system:

Find the inverse, if it exists, of the given matrix. -

Provide an appropriate response. -Use a graphing utility and augmented matrix methods to solve the system: Express your answer accurate to three decimal places.

Solve using Gauss-Jordan elimination. -

Solve the system of equations by graphing. -

Perform the operation, if possible. -Let A = an ad B = . . Find A + B.

Functions and Graphs

Limits and the Derivative

Additional Derivative Topics

Integration

Multivariable Calculus

Appendix A: Basic Algebra Review

Appendix B: Special Topics Online at Googlmjbxrg

Filters

Exam 4: Graphing and Optimization

Provide an appropriate response. -Solve the linear system corresponding to the following augmented matrix:

User row operations to change the matrix to reduced form. -

Solve the problem. -Your screen print operation is doing extremely well at the craft shows. Last week you sold 50 tie-dyed shirts for $15 each, 40 Cheraw-Tech crew shirts for $10 each and 30 handpainted T-shirts for $12 each. Use matrix Operations to calculate your total revenue for the week.

Perform the operation, if possible. -Let A = an ad B = . Fi. Fnd AB.

Solve the system of equations by graphing. -

Perform the indicated row operations on the following matrix. -

Identify the row operation that produces the resulting matrix. -

Solve the problem. -Given the technology matrix M and the final demand matrix D stated below, find (I - M)-1 and find the output matrix X.

Perform the operation, if possible. -Let B = -1 6 7 -3 . Find -2B.

Provide an appropriate response. -Use the augmented matrix to solve the system:

Find the inverse, if it exists, of the given matrix. -

Provide an appropriate response. -Use a graphing utility and augmented matrix methods to solve the system: Express your answer accurate to three decimal places.

Solve using Gauss-Jordan elimination. -

Solve the system of equations by graphing. -

Perform the operation, if possible. -Let A = an ad B = . . Find A + B.

Functions and Graphs

Limits and the Derivative

Additional Derivative Topics

Integration

Multivariable Calculus

Appendix A: Basic Algebra Review

Appendix B: Special Topics Online at Googlmjbxrg

Filters