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
dexar [7]
3 years ago
10

Substitute -4×+y=6 , -5×-y=21

Mathematics
1 answer:
Talja [164]3 years ago
5 0

Answer:

(x, y) = (- 3, - 6)

Step-by-step explanation:

given the 2 equations

- 4x + y = 6 → (1)

- 5x - y = 21 → (2)

rearrange equation (1) expressing y in terms of x

y = 6 + 4x → (3)

Substitute y = 6 + 4x into equation (2)

- 5x - (6 + 4x) = 21

- 5x - 6 - 4x = 21

- 9x - 6 = 21 ( add 6 to both sides )

- 9x = 27 ( divide both sides by - 9 )

x = - 3

Substitute x = - 3 into (3)

y = 6 - 12 = - 6

solution is (- 3, - 6)


You might be interested in
A circle is divided into 6 equal parts. What is the angle measure of 1 part?
drek231 [11]
The angle measure of one part will be 60.

360/6 = 60 

That is because the circle it divided into 6 equal parts and the whole circle is 360.

Hope this helps :)
7 0
3 years ago
Isabelle is planning a road trip to her friend's house. She looks at a map that has a scale of 1/2 in. to 25 mi. The road distan
Orlov [11]
1/2+1/2=1
2*12=24
d=24*25
d=600 miles
I believe I did it in my head so not entirely sure but I am heavily certain of my math
4 0
2 years ago
Read 2 more answers
(20 points) please give me motivation to study and study tips or test taking tips for finals. it would be greatly appreciated.
Daniel [21]

Answer: Think about graduating. Think about never having to take the courses again. You're almost at the finish line! It'll be worth it. You've worked hard all year for this. You can do it!

Study tips: I would recommend Quizlet! They have a section that generates study games. It's a lot more fun than normal studying. It's also a good idea to make a goal for yourself. Try to make a challenge of achieving a certain score! By the time you accomplish said score, you'll find that you've learned a lot. Another tip is to make sure you take breaks. If you work too long without giving yourself a break, it will become harder to focus and your brain will become tired. Just don't get too distracted! set yourself an alarm during break times to help you stay on task. If you become frustrated with a certain subject or task, take a break from that task. Use this time as an opportunity to work on another subject. You can begin working on the first subject again once you feel refreshed. A lot of this may sound redundant, but hopefully it will help at least a little bit. Good luck!

6 0
2 years ago
For an outdoor concert by the city orchestra, concert organizers estimate that 10,000 people will attend if it's not raining. If
Vlada [557]

Answer:

The number of expected people at the concert is 8,500 people

Step-by-step explanation:

In this question, we are asked to determine the expected number of people that will attend a concert if we are given the probabilities that it will rain and it will not rain.

We proceed as follows;

The probability that it will rain is 30% or 0:3

The probability that it will not rain would be 1 -0.3 = 0.7

Now, we proceed to calculate the number of people that will attend by multiplying the probabilities by the expected number of people when it rains and when it does not rain.

Mathematically this is;

Number of expected guests = (probability of not raining * number of expected guests when it does not rain) + (probability of raining * number of expected guests when it rains)

Let’s plug values;

Number of expected guests = (0.3 * 5,000) + (0.7 * 10,000) = 1,500 + 7,000 = 8,500 people

4 0
3 years ago
Which graph shows the solution to this system of inequalities?<br> y &lt; 2x + 4<br> y &gt; -X -3
Arturiano [62]

Answer:

The answer is Graph X.

  • Always start by isolating the variable \color{red}y on the left side of the inequality.
  • Change the inequality to equality symbol.
  • Graph the boundary line from step 2 in the XY-plane.
  • The last step is to shade one side or region of the boundary line.

Please Mark Brainliest If This Helped!

3 0
2 years ago
Other questions:
  • What is the area of the figure <br><br> plz help!!
    10·1 answer
  • A student simplified a fraction to 2/5 by removing the common factors of 2 and 7. What was the original fraction?
    5·1 answer
  • (01.07, 02.01 MC) Brian solved the following equation: 6(3x – 5) = 4(4x + 2) Step Work Justification 1 18x – 30 = 16x + 8 2 2x –
    14·1 answer
  • Convert 3.5km to meters
    13·1 answer
  • Select ALL the equations for which (-6,-1) is a solution.
    5·1 answer
  • I am terrible at math, so i might need some help with this
    7·1 answer
  • Solve for x and y help a girl out besties &lt;3
    10·1 answer
  • What method do we use to find the slope of a table?
    10·1 answer
  • Retook the pic someone helpk
    9·1 answer
  • The video suggests you consider these 4 things before deciding to take out a loan: Is it necessary? Do the monthly payments fit
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!