# Maths Assignments | Online Homework Help

1.   Let A = [–1 2] and B = [1 0]. Find 3A + 4B.

Save Time On Research and Writing
Hire a Pro to Write You a 100% Plagiarism-Free Paper.
 A. [–3 4] B. [2 2] C. [–1 4] D. [1 6]

2.   Evaluate the following determinant:

 A. 76 B. 81 C. 436 D. –76

3.   Find values for the variables so that the matrices are equal.

Save Time On Research and Writing
Hire a Pro to Write You a 100% Plagiarism-Free Paper.
 A. x = -2; y = -2 B. x = 1; y = -2 C. x = -2; y = 1 D. x = 1; y = 1

4.   Write the augmented matrix for the following system of equations:
9x + 5z = 8
6y + 3z = 42
3x + 8y + 2z = 66

 A. B. C. D.

5.   The sum of two numbers is 1 and their product is –342. Find the numbers.

 A. 18 and –19 B. –18 and –19; 18 and 19 C. –18 and 19 D. –18 and 19; 18 and –19

6.   A doctor has told a sick patient to take vitamin pills. The patient needs at least 34 units of vitamin A, at least 7 units of vitamin B, and at least 22 units of vitamin C. The red vitamin pills cost \$0.10 each and contain 8 units of A, 1 unit of B, and 2 units of C. The blue vitamin pills cost \$0.20 each and contain 3 units of A, 1 unit of b, and 6 units of C. How many pills should the patient take each day to minimize costs?

 A. 6 red and 1 blue B. 2 red and 5 blue C. 7 red and 0 blue D. 5 red and 2 blue

7.   Evaluate the following determinant:

 A. –18 B. –420 C. –16 D. 420

8.   Ron attends a cocktail party (with his graphing calculator in his pocket). He wants to limit his food intake to 122g of protein, 118g of fat, and 159g of carbohydrates. According to the health conscious hostess, the marinated mushroom caps have 3g of protein, 5g of fat, and 9g of carbohydrate; the spicy meatballs have 14g of protein, 7g of fat, and 15g of carbohydrates; and the deviled eggs have 13g of protein, 15g of fat, and 6g of carbohydrates. How many of each snack can he eat to obtain his goal?

 A. 9 mushrooms; 4 meatballs; 3 eggs B. 3 mushrooms; 9 meatballs; 4 eggs C. 4 mushrooms; 3 meatballs; 9 eggs D. 10 mushrooms; 5 meatballs; 4 eggs
9.   Evaluate the following determinant.

 A. 37 B. 28 C. –37 D. 61
10.   Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.
x + y + z = 7
x – y + 2z = 7
2x + 3z = 14

 A. B. C. D.
11.   Solve the following system of equations using matrices. Use Gaussian elimination with back-substitution.
x – y + 2z = 6
4x + z = 1
x + 5y + z = –19

 A. {(0, 1, –4)} B. {(0, –4, 1)} C. {(1, 0, –4)} D. {(1, –4, 0)}

12.   Find the dimensions of a rectangle whose perimeter is 36 feet and whose area is 56 square feet.

 A. 3 feet by 15 feet B. 5 feet by 13 feet C. 3 feet by 13 feet D. 4 feet by 14 feet

13.   Solve the following system by the addition method:
x + y = -9
x – y = 14

 A. {(9, –11.5)} B. {(2.5,–11.5)} C. {(2.5,11.5)} D. {(9, 2.5)}

14.

 A. B. C. D.

15.   Evaluate the following determinant:

 A. –812 B. 40 C. 27 D. –13

16.   Mrs. White wants to crochet hats and afghans for a church fundraising bazaar. She needs 6 hours to make hat and 4 hours to make an afghan, and she has no more than 54 hours available. She has material for no more than 12 items, and she wants to make at least two afghans. Let x equal the number of hats she makes and y equal the number of afghans she makes. Write a system of inequalities that describes these constraints.

 A. 6x + 4y ≤ 54; x+y ≤ 12; x ≥ 2 B. 4x + 6y ≤ 54; x+y ≤ 12; x ≤ 2 C. 6x + 4y ≥ 54; x+y ≤ 12; y ≥ 2 D. 6x + 4y ≤ 54; x+y ≤ 12; y ≥ 2
17.   Use Cramer’s rule to solve the following system:
–4x – 7y + 2z = –65
–2x + 7y + 7z = 80
6x – 7y – 2z = –57

 A. {(2, 9, 3)} B. {(3, 7, 3)} C. {(9, 3, 9)} D. {(2, –9, –3)}

18.   Use the coding matrix

A. CURB
C. DARE
D. CARE

19.   Evaluate the following determinant:

A. –43
B. 11
C. 43
D. –42

20.   Write the following linear system as a matrix equation in the form AX = B, where A is the coefficient matrix and B is the constant matrix.
3x + 6y = 75
9x – 2y = 65

 A. B. C. D.

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Homework Writing Services
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Other
Commendable.
Customer 462457, April 29th, 2022
Political science
Good comparison.
Customer 457487, April 17th, 2022
Commendable.
Customer 453375, April 30th, 2022
Nursing
Customer 453627, January 23rd, 2020
Other
The paper was beautifully written and all instructions were followed exactly as stated. Thank you so much for delivering a quality paper.
Customer 452455, February 22nd, 2023
Ethics
Good Job!
Customer 454777, July 8th, 2020
Always format your paper as instructed.
Customer 458115, April 7th, 2022
Other
Although I did not receive my paper on time, the customer care team ensured that I would receive a quality paper. I am pleased with the revision of this paper.
Customer 452455, March 2nd, 2023
Human Resources Management (HRM)
Excellent combination.
Customer 462485, April 3rd, 2022
History
The work was done on time and is better than I could have imagined.
Customer 454439, June 1st, 2020
Education
Excellent work!
Customer 463337, April 18th, 2023
Art (Fine arts, Performing arts)
Always follow instructions, especially on style.
Customer 460547, March 29th, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend