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
Nimfa-mama [501]
3 years ago
6

Solve by the linear combination method (with or without multiplication).

Mathematics
1 answer:
Dima020 [189]3 years ago
5 0

The first step is to name the equations to make the process of solving them easy.

6x+7y=-4....(1)\\5x-3y=-21....(2)

The second step is to multiply  each of the equations by the coefficient of the x term in the other equation. In this case, we will multiply equation  (1) by 5 to get equation (3) and then multiply equation (2) by 6 to get equation (4).

-30x-35y=20...(3)\\30x-18y=-126...(4).

The next step is to add equation equation(3) and  (4) together to get equation (5) as shown below;

-53y=-106....(5)\\=> y= 2.

The next step is to take the value of y and substitute it into any of the equations above.  For this solution, I pick equation (1). The work done to solve for x is shown below.;

6x+7y=-4\\=>6x+7(2)=-4\\=>6x=-18\\=>x=-3

The solution for this system of equations is (-3,2)


You might be interested in
4(-2d-3)=12, someone please solve this for me asap
wlad13 [49]

4(-3 + -2d) = 12

(-3 * 4 + -2d * 4) = 12

(-12 + -8d) = 12

-12 + -8d = 12

-12 + 12 + -8d = 12 + 12

-12 + 12 = 0

0 + -8d = 12 + 12

-8d = 12 + 12

12 + 12 = 24

-8d = 24

d = -3

5 0
3 years ago
If sin 0 = 15/17 use pythagorean identity to find cos 0
Inga [223]
Hello : 
sin<span>θ = 15/17
</span> use pythagorean identity : cos²θ +sin² θ = 1 
cos²θ =  1 - sin² θ
cos²θ = 1-(15/17)² 
cos²θ = 1- 225/289
cos²θ = 64/289
cos²θ = (8/17)²
cosθ = 8/17 or -8/17
8 0
3 years ago
Read 2 more answers
HELPPP look at the figure.<br> What is the slope of the graph?
m_a_m_a [10]

Answer:

-5

Step-by-step explanation:

becuses look at where the slope intersecs the y axis. Its -5

EZ

3 0
3 years ago
Read 2 more answers
Simplify (8j3 + 5j2 – 3) – (5j3 + 7j2 – 12j + 7) ...?
Free_Kalibri [48]
The answer to the problem is:

<span>8j^3 + 5j^2 - 3 - 5j^3 - 7j^2 + 12j - 7
 </span>
<span>3j^3 - 2j^2 + 12j - 10 
</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!


5 0
3 years ago
Read 2 more answers
A line with a slope of -2 crosses the y-axis at (0, 3). The equation of the line is
Alchen [17]
M = -2 and b = 3
so equation
y = -2x + 3

hope it helps
4 0
3 years ago
Other questions:
  • What is the expected value of X?
    14·1 answer
  • Solve the following System of Three Equations: x−3y+z=−15<br> 2x+y−z=−2<br> x+y+2z=1
    5·1 answer
  • A computer store buys a computer system at a cost of $465.60. The selling price was first at $776, but then the store advertised
    10·1 answer
  • 3.simplifyyyyyyyyyyyyyyyyyyy
    10·2 answers
  • Find the value of X.
    6·2 answers
  • ​Dustin wants to buy a new gaming computer that costs $1,005. ​He has saved $487. How much more money does Dustin need to ​buy t
    10·2 answers
  • The angles below are supplementary. What is the value of x?<br>6x + 48)​
    13·1 answer
  • Which of the following graphs could be the graph<br> of y = -2x +1?
    9·2 answers
  • a window frame that uses a scale of 1 cm to 6 inches. Create another scale drawing of the same window using a scale of 1 cm to 1
    12·2 answers
  • Is -60 greater or least than 60
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!