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
rodikova [14]
2 years ago
12

Find the solution set (x,y,z) of the system: 3x-2y+4z=6 2y-3z=20 6z=12

Mathematics
1 answer:
gizmo_the_mogwai [7]2 years ago
4 0

Answer:

The solution is x = 8, y = 13 and z = 2.

Step-by-step explanation:

We are given a system of equations with the variables x, y, and z from which we have to solve for x, y, and z.

The equations are

3x - 2y + 4z = 6 ........ (1)

2y - 3z = 20 .......... (2)

6z = 12 ......... (3)

Now, from equation (3),  we get z = 2.

Now, putting z = 2 in equation (2) we get

2y = 20 + 6 = 26  

⇒ y = 13

Now, from equation (1), putting y = 13 and z = 2, we get  

3x = 6 - (4 × 2) + (2 × 13) = 24

⇒ x = 8

So the solution is x = 8, y = 13 and z = 2. (Answer)

You might be interested in
Which two of the following are benefits of consumer programs?
Dennis_Churaev [7]

Answer:

The correct answer is 1) They help prosecute companies that sell unsafe products to consumers. And 4) They help consumers identify the best product reviews from various sources.

Explanation:

Consumer programs are all those that were created to provide the customer with the correct information about the products and their quality.

Nowadays, with the competition between the companies that present the same product, the client can feel confused about what product to consume. Still, through the consumer programs, the person can choose the best product depending on the program review, but in this way, You will be sure to select the right product based on your needs.

<em>I hope this information can help you.</em>

7 0
2 years ago
Read 2 more answers
A brand of popcorn instructs users to microwave for 90–120 seconds on high. A student wonders what the ideal microwave time for
san4es73 [151]

Answer:

A.) the levels

Step-by-step explanation:

edge 2020

6 0
3 years ago
Read 2 more answers
Solve the following inequality:
ad-work [718]

Answer:

The answer is option 3.

Step-by-step explanation:

In order to solve the inequality, you have to get rid of -3 by adding 3 to both sides :

k - 3 \leqslant 9

k - 3 + 3 \leqslant 9 + 3

k \leqslant 12

4 0
3 years ago
Two fair coins are flipped. Given that at least one coin lands on a head, calculate the probability of one head and one tail. Wr
Greeley [361]

The probability of one head and one tail is 2/3.

<u>Step-by-step explanation</u>:

  • The possibilities for flipping two fair coins are {T,T}, {H,H}, {H,T}, {T,H}
  • Given the case that at least one coin lands on a head, So the total possibilities are {H,H}, {H,T}, {T,H} = 3 possibilities
  • Required event is 1 head and 1 tail= {H,T}, {T,H} = 2 possibilities

To calculate the probability of one head and one tail,

Probability = required events / Total events

Probability = 2/3

8 0
3 years ago
If x = a cosθ and y = b sinθ , find second derivative
Olin [163]

I'm guessing the second derivative is for <em>y</em> with respect to <em>x</em>, i.e.

\dfrac{\mathrm d^2y}{\mathrm dx^2}

Compute the first derivative. By the chain rule,

\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm dy}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}

We have

y=b\sin\theta\implies\dfrac{\mathrm dy}{\mathrm d\theta}=b\cos\theta

x=a\cos\theta\implies\dfrac{\mathrm dx}{\mathrm d\theta}=-a\sin\theta

and so

\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{b\cos\theta}{-a\sin\theta}=-\dfrac ba\cot\theta

Now compute the second derivative. Notice that \frac{\mathrm dy}{\mathrm dx} is a function of \theta; so denote it by f(\theta). Then

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm dx}

By the chain rule,

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm df}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}

We have

f=-\dfrac ba\cot\theta\implies\dfrac{\mathrm df}{\mathrm d\theta}=\dfrac ba\csc^2\theta

and so the second derivative is

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac ba\csc^2\theta}{-a\sin\theta}=-\dfrac b{a^2}\csc^3\theta

4 0
3 years ago
Other questions:
  • Half of the product of two consecutive numbers is 105. To solve for n, the smaller of the two numbers, which equation can be use
    11·2 answers
  • I forgot how to do these, could somebody explain.<br> 30 points for both
    13·1 answer
  • Four less than the product of 8 and a number equals 9
    5·1 answer
  • Rachel used 4.5 cups of apple juice in fruit punch that serves 12. Andy used 4.75 in his that serves 10. How much more apple jui
    7·1 answer
  • Find the other endpoint of the line segment with the given endpoint and midpoint. Endpoint: (-8,8) Midpoint: (5,-3)
    10·1 answer
  • Find the measure of the angles
    9·1 answer
  • »<br> Evaluate<br> 4 a + 3 b<br> when a = 3 and b= -1.2<br> 4 (3) + 5 (-1.2)
    9·2 answers
  • A city has a population of 370,000 people. Suppose that each year the population grows by 4.25%. What will the population be aft
    5·1 answer
  • Twenty years ago a small town in Texas had a population of 10,000. The population has increased 8% each year
    13·1 answer
  • 3. Two of the vertices of an equilateral triangle are (0, -a)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!