algebra homework 5

 

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   Question 2

 

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   Question 3

 

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   Question 4

 

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   Question 5

 

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   Question 6

 

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   Question 7

 

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   Question 8

 

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   Question 9

 

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   Question 10

 

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   Question 11

 

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   Question 12

 

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   Question 13

 

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   Question 14

 

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   Question 15

 

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   Question 16

 

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   Question 17

 

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   Question 18

 

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   Question 19

 

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   Question 20

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Que
stion

1

5 points Save

Perform the indicated matrix operations

.

Let A = and B = . Find 3A

+

4B.

Qu
estio
n 2

5 points Save

Perform the indicated matrix operations.

Let A = and B = . Find 4A + B.

Qu
estio
n 3

5 points Save

Find the inverse of the matrix.

No inverse

javascript:saveItem(‘_10011935_1′,’1’)

javascript:saveItem(‘_10011935_1′,’1’)

javascript:saveItem(‘_10011936_1′,’2’)

javascript:saveItem(‘_10011936_1′,’2’)

javascript:saveItem(‘_10011937_1′,’3’)

javascript:saveItem(‘_10011937_1′,’3’)

Qu
estio
n 3
5 points Save

Find the inverse of the matrix.

No inverse

Qu
estio
n 4

5 points Save

Solve the system of equations.

inconsistent (no solution)
x = 4, y = 0, z = 5
x = 4, y = 5, z = 0
x = 0, y = 5, z = 4

javascript:saveItem(‘_10011937_1′,’3’)

javascript:saveItem(‘_10011937_1′,’3’)

javascript:saveItem(‘_10011938_1′,’4’)

javascript:saveItem(‘_10011938_1′,’4’)

Qu
estio
n 5

5 points Save

Solve the system.

inconsistent (no solution)
y = -4x + 7, where x is any real number
x = -4y + 7, where y is any real number
y = 4x + 7, where x is any real number

Qu
estio
n 6

5 points Save

Use Cramer’s rule to solve the linear system.

x = 6, y = 0, z = 8
x = 5, y = -2, z = -8
x = 5, y = 2, z = 8
x = 2, y = 8, z = 2

Qu
estio
n 7

5 points Save

Find the maximum or minimum value of the objective function,
subject to the constraints graphed in this feasible region.

z = x + 6y + 9 Find minimum.

Minimum 25
Minimum 31
No Minimum
Minimum 41

javascript:saveItem(‘_10011939_1′,’5’)

javascript:saveItem(‘_10011939_1′,’5’)

javascript:saveItem(‘_10011940_1′,’6’)

javascript:saveItem(‘_10011940_1′,’6’)

javascript:saveItem(‘_10011941_1′,’7’)

javascript:saveItem(‘_10011941_1′,’7’)

Qu
estio
n 7
5 points Save

Find the maximum or minimum value of the objective function,
subject to the constraints graphed in this feasible region.
z = x + 6y + 9 Find minimum.

Minimum 25
Minimum 31
No Minimum
Minimum 41

Qu
estio
n 8

5 points Save

Find the value of the determinant.

-58
42
390
-42

Qu
estio
n 9

5 points Save

Solve the system of equations.

x = 0, y = 3, z = 0
inconsistent (no solution)
x = 0, y = 0, z = 3
x = 2, y = 3, z = 0

javascript:saveItem(‘_10011941_1′,’7’)

javascript:saveItem(‘_10011941_1′,’7’)

javascript:saveItem(‘_10011942_1′,’8’)

javascript:saveItem(‘_10011942_1′,’8’)

javascript:saveItem(‘_10011943_1′,’9’)

javascript:saveItem(‘_10011943_1′,’9’)

Qu
estio
n 9
5 points Save

Solve the system of equations.

x = 0, y = 3, z = 0
inconsistent (no solution)
x = 0, y = 0, z = 3
x = 2, y = 3, z = 0

Que
stion
10

5 points Save

Perform the indicated operations and simplify.

Let A = , B = , and C = . Find AB

+

BC.

Que
stion
11

5 points Save

Solve the problem.

Rob bought 2 pairs of shorts, 3 shirts and a pair of shoes for $146.64.
Jessie bought 3 pairs of shorts, 5 shirts and 2 pairs of shoes for
$256.35. Allen bought a pair of shorts and 4 shirts for $104.07. What
is the price of a pair of shorts? Express answer rounded to two
decimal places.

$14.55
$50.40
$22.38
$10.30

javascript:saveItem(‘_10011943_1′,’9’)

javascript:saveItem(‘_10011943_1′,’9’)

javascript:saveItem(‘_10011944_1′,’10’)

javascript:saveItem(‘_10011944_1′,’10’)

javascript:saveItem(‘_10011945_1′,’11’)

javascript:saveItem(‘_10011945_1′,’11’)

Que
stion
11
5 points Save

Solve the problem.
Rob bought 2 pairs of shorts, 3 shirts and a pair of shoes for $146.64.
Jessie bought 3 pairs of shorts, 5 shirts and 2 pairs of shoes for
$256.35. Allen bought a pair of shorts and 4 shirts for $104.07. What
is the price of a pair of shorts? Express answer rounded to two
decimal places.

$14.55
$50.40
$22.38
$10.30

Que
stion
12

5 points Save

Write the partial fraction decomposition of the rational
expression.

+
+
+
+

javascript:saveItem(‘_10011945_1′,’11’)

javascript:saveItem(‘_10011945_1′,’11’)

javascript:saveItem(‘_10011946_1′,’12’)

javascript:saveItem(‘_10011946_1′,’12’)

Que
stion
13

5 points Save

Solve the problem.

Given that = 3, find the value of the determinant

.

0
-9
6
9

Que
stion
14

5 points Save

Write the partial fraction decomposition of the rational
expression.

– –

– +

+ –

+ +

javascript:saveItem(‘_10011947_1′,’13’)

javascript:saveItem(‘_10011947_1′,’13’)

javascript:saveItem(‘_10011948_1′,’14’)

javascript:saveItem(‘_10011948_1′,’14’)

Que
stion
14
5 points Save

Write the partial fraction decomposition of the rational
expression.
– –
– +
+ –

+ +

Que
stion
15

5 points Save

Write the partial fraction decomposition of the rational
expression.
+
+
+ +
+ +

javascript:saveItem(‘_10011948_1′,’14’)

javascript:saveItem(‘_10011948_1′,’14’)

javascript:saveItem(‘_10011949_1′,’15’)

javascript:saveItem(‘_10011949_1′,’15’)

Que
stion
16

5 points Save

Graph the inequality.

x + y < -2

javascript:saveItem(‘_10011950_1′,’16’)

javascript:saveItem(‘_10011950_1′,’16’)

Que
stion
16
5 points Save

Graph the inequality.

x + y < -2

Que
stion
17

5 points Save

Perform the matrix multiplication.

javascript:saveItem(‘_10011950_1′,’16’)

javascript:saveItem(‘_10011950_1′,’16’)

javascript:saveItem(‘_10011951_1′,’17’)

javascript:saveItem(‘_10011951_1′,’17’)

Que
stion
17
5 points Save

Perform the matrix multiplication.

Que
stion
18

5 points Save

Solve the system using the inverse method.

x = 5, y = -2, z = 2
x = -5, y = -2, z = -2
x = 5, y = 2, z = -2
x = 2, y = 5, z = 2

Que
stion
19

5 points Save

Solve the system.

dependent (many solutions)
(2, 4)
(2, 3)
inconsistent (no solution)

javascript:saveItem(‘_10011951_1′,’17’)

javascript:saveItem(‘_10011951_1′,’17’)

javascript:saveItem(‘_10011952_1′,’18’)

javascript:saveItem(‘_10011952_1′,’18’)

javascript:saveItem(‘_10011953_1′,’19’)

javascript:saveItem(‘_10011953_1′,’19’)

Que
stion
19
5 points Save

Solve the system.

dependent (many solutions)
(2, 4)
(2, 3)
inconsistent (no solution)

Que
stion
20

5 points Save

Perform the indicated operation, whenever possible.

+

javascript:saveItem(‘_10011953_1′,’19’)

javascript:saveItem(‘_10011953_1′,’19’)

javascript:saveItem(‘_10011954_1′,’20’)

javascript:saveItem(‘_10011954_1′,’20’)

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