 # Keystone High School Discrete Mathematics Sequences & Series Questions Quiz Anonymous

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criss53
School: University of Maryland  Attached.

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Semester 2 Exam

David Williams 50

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Take Test: 12.00 Semester 2 Exam

Take Test: 12.00 Semester 2 Exam
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QUESTION 1

2 points

Which of the following is the correct matrix representation of the Saturday movie ticket sales?
Ticket Sales for Thursda
Ticket Sales for Friday Chil Ticket Sales for Saturda
y Children
dren
y Children
Regular

257

183

355

402

398

423

Matinee

135

168

242

311

376

386

QUESTION 2
If A =

QUESTION 3

and B =

2 points

2 points

, find B - A.

Matrix A has dimensions 5 x 4. Matrix B has dimensions 4 x 3. These two matrices can be multiplied.
True
False

QUESTION 4

2

i t

QUESTION 4

2 points

2 points

2 points

2 points

2 points

Question Completion Status:

Evaluate

QUESTION 5

Evaluate
Does not exist.

QUESTION 6
Find the determinant of
-10
6
10
18

QUESTION 7
When lines intersect in one place, they are ____________________.
consistent
independent
dependent
inconsistent

QUESTION 8
Does the following system of equations have a solution?

Question Completion Status:

Yes
No

QUESTION 9

2 points

2 points

2 points

2 points

What is the approximate solution of the following system of equations?

(-1, 1)
(-1, -1)
(1, -1)
(1, 1)

QUESTION 10
Solve y = 2x - 4 by the substitution method.
7x – 5y = 14
(0, 2)
(2, 0)
(-2, 1)
(1, 3)

Q U E S T I O N 11
Solve the following system of equations by using the substitution method.
x+y=1
3x – y = 11
(-3, 4)
(6, -5)
(3, -2)
Inconsistent

QUESTION 12
Solve the following system of equations by using the elimination method.
2x – 3y = -10
3x + 5y = 4
(2, -2)
(-2, 2)
Inconsistent
Consistent

Consistent
Question Completion Status:

QUESTION 13

2 points

2 points

2 points

2 points

Solve the following system of equations by using the elimination method.
2x – 4y = 8
3x + 8y = -2
(1, 3)
(4, 5)
(2, -1)
(-2, -1)

QUESTION 14
Solve the following system of equations using matrices.
2x + 4y = 16
-4x – 8y = 32
(2, 2)
(-2, -2)
Consistent
Inconsistent

QUESTION 15
Solve the following system of equations using matrices.
y = 2x - 2
3x - 6y = -6
(1, 0)
(3, 4)
(-2, -2)
(2, 2)

QUESTION 16

The difference of two numbers is 4. 5 times the smaller number is four more than three times the
larger. Find the two numbers.
-10 and -14
10 and 14
8 and 12
-8 and -12

QUESTION 17
Which of the following is a solution to the following system of inequalities?

(1, 1)
(-4, 0)
(3, -3)

2 points

(0, 5)

Question Completion Status:

QUESTION 18

2 points

2 points

2 points

2 points

The following is the solution of x – 2y > -2.
x + y ≥ -3

True
False

QUESTION 19
Solve x + 2y = 10
-2x – 4y = 24
5x + 5y + 5z = 15
Infinite number of solutions
no solutions
(2, 4, -3)
(0, -6, 9)

QUESTION 20
Solve x + 2y = 50-2x + 3y = 405x + 5y + 5z = 300
(10, 20, 30...

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Return customer, been using sp for a good two years now. Anonymous
Thanks as always for the good work! Anonymous
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