1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ivahew [28]
3 years ago
15

The reduced row-echelon form of the augmented matirx of a system of equations is given. Find the solution of the system.

Mathematics
1 answer:
vodomira [7]3 years ago
3 0

Answer:

option C)

(19,2,5)

Step-by-step explanation:

| 4 | x

| 12 | y

| 5 | z

After reducing the matrix in row-echelon form we are left with three equation as following

Equation 1

0x + 0y + 1z = 5

Equation 2

0x + y1 + 2z = 12

Equation 3

1x + 0y -3z = 4

<h3>Solution</h3>

As in first equation

0 + 0 + z = 5

z = 5

Put this value of z in equation 2 and 3

y + 2(5) = 12

y + 10 =12

y = 12 - 10

y = 2

x + 0 -3(5) = 4

x - 15 = 4

x = 4 + 15

x = 19

<h3 /><h3>So the solution of the system is (x,y,z) = (19,2,5)</h3>

You might be interested in
If you work for an hourly wage, your gross pay is a function of the number of hours that you work. If you earn $8 per hour, comp
Gelneren [198K]
1. Let x be the number of hours that you worked. We know from our problem that your hourly wage is $8,  so your hourly wage will be given by the linear function: y=8x. 
where
f(x) is your gross pay.
x is the number of hours that you worked. 

To complete the table, we just need to evaluate the function at the given hours; in other words, we are going to replace x with the number of hours in our linear function:
y=8(0)=0
y=8(3)=24
y=8(5)=40
y=8(7)=56
y=8(10)=80
y=8(12)=96

We can conclude that yous should fill your table as follows: 
<span>Number of Hours
0
3
5
7
10
12
</span><span>
Gross Pay
0
24
40
56
80
96

2. Remember that the domain of a function are the set of the x-values of the function; the range of a function are the set of y-values of the function. From our previous point, we can infer that the ordered pairs of the function are: (0,0), (3,24), (5,40), (7,56), (10,80), and (12,96). The y-values and hence the range of the function are: 0, 24, 40, 56, 80, 96. Remember that in the quadrant I both the x-coordinates and the y-coordinates are positive. Since all the coordinates of our points are positive, we can conclude that the correct answer is:
</span><span>d. 0, 24, 40, 56, 80, 96; Quadrant I</span>

6 0
3 years ago
Read 2 more answers
What is the numerator in this fraction?<br> 1/2<br> 2<br> 1
nadezda [96]

Answer:

1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What times 2 is equal to 20?
alina1380 [7]
X×2=10 X=10÷2 X=5 Proof: 5×2=10
7 0
4 years ago
Read 2 more answers
Question #12: A department store has a discount on shoes based on a
Helga [31]

Answer:

$77

Step-by-step explanation:

The answer is $77 because first you need to find how much money was discounted by doing 70-49 to get 21. Then you need to find how much percent 21 is of 70 by doing 21/70, then you would get 0.3 which is 30% since you have to multiply it by 100. This means that there is a 30% discount. Then you would do 0.3*110=33. This means that the 30% discount takes away $33. So 110-33=77. The answer is $77.

6 0
3 years ago
Under her cell phone plan, Lillian pays a flat cost of $47 per month and $3
anastassius [24]

Answer:

3.4 gigabytes

Step-by-step explanation:

Because 57.20$ divided by 47 is 10.20 and 3 goes in to 10.2 3.4 times.

3 0
3 years ago
Other questions:
  • A principal of $3800 is invested at 3.75% Interest, compounded annually. How much will the investment be worth after 6 years?
    12·1 answer
  • Can anyone tell me this answer and explain plz❤️
    7·2 answers
  • HELP PLEASE!!!!!! I will give anyone who knows the answer a brainliest!
    12·2 answers
  • In the function g(x) = 5x – 9, what is the value of g (3)?
    15·1 answer
  • If a litre of water is provided for 5 people, how much for 7 people?
    7·2 answers
  • How much larger than 3/4 is 25/32
    10·1 answer
  • What is 4/3 times 3.14 times 8 cubed divided by 2
    13·1 answer
  • A carpet installer charges a flat rate of $40, plus $1.50 per square foot for labor. So, the total cost for labor depends on the
    8·1 answer
  • Another question for free points a brilientest or something like that
    13·1 answer
  • Help me answer question 2. ​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!