Solve the following system of equations two ways:

First solve using elementary row operations (you may use back-substitution if you like). Make sure you annotate your work clearly.
Second solve by expressing the system as a matrix equation of the form Ax=b (make sure you provide some explanation of where this matrix comes from.), find A^-1, and then multiply both sides of the equation with A^-1.

Here is your system of equations:
x + y - 2 = 4
2x – y + z = 2
-3x + y + 5z = 2

Answers

Answer 1

Answer:

im sorry this is not an answer, im just doing this to complete my profile sorry


Related Questions

can you please help me ​

Answers

Answer:

the answer is  XD

Step-by-step explaion:

help!! 100 points! (IF SPAM I WILL REPORT YOU AND IF YOU WANT POINTS TYPE FRE ANSWERS IN SEARCH)

Answers

Answer:

Step-by-step explanation:

Part A

Area of a rectangle = length x width

Garden area = 7 3/4 x 2 2/3

= 31/4 x 8/3

= 62/3

= 20 2/3 square feet

Part B

5/8 of the area = 62/3 * 5/8

= 31*5 / 3*12

= 155 / 36

= 4 11/36

The question asks to do so without calculation - the only way is that because the length is approximately 8 feet, section off 5 feet along the length will give an area approximately 5/8 of the total area.

9) A store is selling t-shirts for $8
each. If Britt buys 15 shirts how
much will she pay for them? ?

Answers

Answer:

$120 before tax.

Step-by-step explanation:

8 * 15 = 120

Answer:

She will pay $120 for 15 shirts

Step-by-step explanation:

multiply 15 x 8 = 120

Hope this helps:)........if not then sorry for wasting your time and may God bless you:)

Find and describe the mistake in this equation. can someone help

Answers

Answer:

i think it would be -14 + 2y so the mistake was making the 2y negative

Step-by-step explanation:

Negative times negative = positive

Answer: The distribution of -2(7 - y) is incorrect. They came out with -14 -2y.

It should have been -14 + 2y

At the end, it would have been a division by +2 , so the solution would be y=3

Step-by-step explanation:

The product of multiplying a negative number by a negative number is a positive number.

Jen was making cake pops for the bake sale. After 3 hours, she had completed half of the work. She called Maryna for help and together they finished everything in half an hour. How long would it take Maryna to finish the job alone if she replaced Jen after Jen baked for 3 hours?

Answers

I'm going to assume in an hour and a half, correct me if I'm wrong

Answer:

It will take 0 hours and 36 minutes

Step-by-step explanation:

The cost of a concert ticket last week was $60.00. This week a concert ticket is $75.00. What is the percent increase of the ticket from last week to this week

Answers

Answer: The increase was by 25 %. (125% change)

Step-by-step explanation: 75-60 is 15, so the difference was that it increased by $15. 15 divided by 60, is .25, or 25%. Meaning it increased by 25%, or there was an 125% change.

the tangent to curve y = 2x / x - 1 which is not equal to1, at the point (2,4) and the normal to the same curve at the point (3,3) intersect at the point P find the coordinate of p

Answers

Answer:the curve is 2 4

Step-by-step explanation:

The average depth of the Arctic Ocean is 4 x 10^3 feet while the average depth of the Atlantic Ocean is 1.2 × 10^4 feet. How many times more deep is the Atlantic Ocean than the Arctic Ocean?

Answers

Answer:

3 times as deep.

Step-by-step explanation:

(1.2 x 10^4) / (4 x 10^3)

= 0.3 x 10^1

= 3

Do exactly what it’s says please!

Answers

Answer:

p(1+r/100)^t where P is the amount of money to be invested ,r is the rate at which its compounded annually and t is the duration or period NOTE 1is constant

please help i will mark braineist. read the following sentence. She ran towards them her hat flew off her curls bounced as she charged toward the soldiers trying to invade her home What type of error does this example contain? A

misplaced participial phrase

A fragment missing a subject

A fragment missing a verb

Arun-on sentence ​

Answers

The Answer is D it is a run on, it needs to have commas instead of just piling it all together, you welcome

Determine whether the underlined number describes a population parameter or a sample statistic. Explain your reasoning. Sixty-five of the 93 passengers aboard an airship survived an explosion Choose the correct statement below.
A. The number is a sample statistic because it is a numerical description of all of the passengers that survived.
B. The number is a population parameter because it is a numerical description of all of the passengers that survived.
C. The number is a population parameter because it describes the people in the airship, which is a subset of all people.
D. The number is a sample statistic because it describes the people in the airship, which is a subset of all people.

Answers

Answer: A. The number is a sample statistic because it is a numerical description of all of the passengers that survived.

Step-by-step explanation:

A population is simply similar items or events that a researcher or an experimenter is interested and wants to carry out an experiment on.

A statistic is simply referred to as the piece of information gotten from the population while a sample statistic is the piece of statistical information which a researcher will be able to get from the statistic.

In this scenario, the number is a sample statistic because it is a numerical description of all of the passengers that survived.

Find the domain of the function expressed by the formula: y= 1/x +7

Answers

Answer:

Range

{y element R : y is not equal to 0}

Answer:

is this it?

Step-by-step explanation:

radius of a circle with a circumference of 20pi

Answers

Answer:

3.14 cm²

Explanation:

1.) 2πr = 20π

2.) r =20/2

3.) r = 10 cm

4.) The radius of the circle = 10 cm

5.) The area = πr2 ≈ 3.14 ×(10)² = 3.14 ×(100) = 314 cm²

6.) 3.14 centimeters squared

. What is the probability of flipping a coin twice, and FIRST landing on heads,
THEN landing on tails?

Answers

im guessing 50/50 (not a mathematical answer tho)

The graph of y=mx is given by the table. Find the coefficient m and fill in the table:

x 8 6 4 0 −2 −8 −10
y 8


find the blanks

QUICKLY PLEASE

Answers

Answer:

6=6

4=4

0=0

-2=-2

-8=-8

-10=-10

4/5,278 what's the answer

Answers

Answer:

The given Divisor = 4 and Dividend = 5278

1 3 1 9

4 5 2 7 8

4

1 2

1 2

7

4

3 8

3 6

2

The Quotient is 1319 and the Remainder is 2

Step-by-step explanation:

..

Solve each equation
4) -2x = 28

Answers

Answer:

X=-14

Step-by-step explanation: I did it before

the answer would be x=-14

first you want to get x by itself so you would divide by -2 on each side of the equation, therefore 28/-2 would be -14 is equal to the x value.

The graph of y = f ′(x), the derivative of f(x), is shown below. List the intervals where the graph of f is concave down.
(–4, –2) U (2, 4)
(–2, 2)
(–4, 0)
(0, 4)

Answers

Answer :

(-4,0)

Step by step explanation:
You have to use the graph. You can see that it’s (-4,0)

Simplify the expression (64)2.

Answers

Answer:

See below.

Step-by-step explanation:

(64)2

64*2

128

-hope it helps

Answer:

128

Step-by-step explanation:

it's multiplication(64)2

64*2

128

Which of the following shows numbers ordered from least to greatest

Answers

Answer:

A

Step-by-step explanation:

It is option A: -2, -1, 0, 1

The figure shown is a square with a triangular hole cut into one side. The ratio of the heighth of the
triangle to a side length of the square is 7 to 8. The ratio of the base b of the triangle to the side length of
the square is 1 to 2. If the area of the square is 64 square inches, what is the area of the shaded part of the
square?
b
h
The area of the shaded part of the square is
square inches.

Answers

Answer:it is 50 because you have to subtract the area of the triangle (14) from the area of the square (64)!

Step-by-step explanation: hope this helped love you! -marina mae :)

Use a difference identity to find the exact value of tan 15.

Answers

X minus positive three minus -2 equals 7-15

Answer:

[tex]2-\sqrt{3}[/tex]

Step-by-step explanation:

[tex]tan15 = tan(45 - 30)=\frac{\tan{45}-\tan{30}}{1+\tan{45}\tan{30}}\\\\=\frac{1-\frac{1}{\sqrt{3}}}{1+\frac{1}{\sqrt{3}}}\\\\\\=\frac{\sqrt{3}-1}{\sqrt{3}+1}\\\\\\[/tex]

[tex]=\frac{(\sqrt{3}-1)^2}{3-1}\\=\frac{3+1-2\sqrt{3}}{2}\\=2-\sqrt{3}[/tex]

a rectangular tub has a perimeter of 16 feet. if the length of the tub is 6 feet, what is the width of the tub?

Answers

Answer:

The width is 2

Step-by-step explanation:

The formula is P= (L times W)x2. 6x2=12. 16-12=4. 4/2=2. The width is 2

At Kroger 10 waffles cost $2.56. what is the unit price for 1 waffle at Kroger?​

Answers

Answer:

I think the answer is 25 cents($0.25)

Step-by-step explanation:


An angle measures 6° less than the measure of its supplementary angle. What is the
measure of each angle?

Answers

Answer:

The angles are 87 degrees and 93 degrees.

Im not sure if its correct-

Step-by-step explanation:

x+(x-6)=180

2x=174

x=87

Micaela answered 158 questions correctly on her multiple choice math final that had a total of 200 problems. What percentage of questions did Micaela answer correctly on the final exam?

Answers

Answer:

79%

Step-by-step explanation:

Based on the given conditions, formulate:  158 ÷ 200

Reduce the fraction: 79/100

Reduce the fraction:

Rewrite a fraction with denominator equals 100 to a percentage: 79%

Answer: 79%

A) 4+10+8=
B) 5-9+1=
C) -8-2+3=
D) -15+8-7=
E) 24+6-12=
F) 18-3-21=

Answers

Answer:

See below.

Step-by-step explanation:

A) 4 + 10 + 8 = 22

B) 5 - 9 + 1 = -3

C) -8 - 2 + 3 = -7

D) -15 + 8 - 7 = -14

E) 24 + 6 - 12 = 18

F) 18 - 3 - 21 = -6

A ternary string is an ordered string of characters which consists of digits (0,1, or 2). For example, the ternary string 2122010 consists of exactly 2 zero's, 2 one's and 3 two's; another ternary string meeting these conditions is 0021221. How many ternary strings are there with exactly 4 zero's, 3 one's and 6 two's?

Answers

The number of ternary strings is an illustration of combination

There are 6227020800 ternary strings with exactly 4 zero's, 3 one's and 6 two's

How to determine the number of strings

Assume the zero's, one's and the two's can take any position in the string

For a ternary string of exactly 4 zero's, 3 one's and 6 two's, the number of characters in the string is 13.

The first 4 zeros can take any of the 13, 12, 11 and 10th positions

The next 3 ones can take any of the 9, 8 and 7th positions

The remaining 6 twos can take any 6! positions

So, the number of strings is:

Strings = 13* 12 * 11 * 10 * 9 * 8 * 7 * 6!

Evaluate the products

Strings = 6227020800

Hence, there are 6227020800 ternary strings with exactly 4 zero's, 3 one's and 6 two's

Read more about combination and permutation at:

https://brainly.com/question/11732255

What is the percentage chance of choosing someone who owns a cat from this group?

Answers

Answer:

Answer: 40% out of 100% Explanation: I did the math

Answer:

There is  a 36% chance of choosing someone who owns a cat.

Step-by-step explanation:

4 out of the 11 people listed own cats. So you need to divide 4 by 11.

4/11 = 0.36 (rounded to the nearest tenths)

Hope that helps!

Simplify -1/2(32x-40)+(20x-4)

Answers

-4x - 20

Step-by-step explanation:

-1/2 (32x - 40) + ( 20x - 40)

open the bracket

-1/2 × 32x = -16x

-1/2 × -40 = 20

.

. . -16x + 20 +20x - 40

collect like term

-16x + 20x + 20 - 40

4x - 20

simplify = 4(x-5)

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