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
Bumek [7]
3 years ago
11

*25 points!*

Mathematics
1 answer:
mariarad [96]3 years ago
7 0
Pick 2 pairs of equations t<span>hen use addition and subtraction to eliminate </span>the same variable<span> from both pairs of equations then it is left with 2 variables 
</span>Pick two pairs
<span><span>4x - 3y + z = - 10</span><span>2x + y + 3z = 0
</span></span>eliminate the same variable from each system
<span><span>4x - 3y + z = - 10</span> 
<span>2x + y + 3z = 0</span> 

<span>4x - 3y + z = - 10</span> 
<span>-4x - 2y - 6z = 0</span> 

<span>-5y - 5z = - 10</span> 

<span>2x + y + 3z = 0</span> 
<span>- x + 2y - 5z = 17</span> 

<span>2x + y + 3z = 0</span> 
<span>-2x + 4y - 10z = 34</span> 

<span>5y - 7z = 34
</span></span>Solve the system of the two new equations:
<span><span>-5y - 5z = - 10</span> 
<span>5y - 7z = 34</span> 

<span>-12z = 24</span> 
which is , <span>z = - 2</span> 

<span>-5y - 5(- 2) = - 10</span> 
<span>-5y = - 20</span> 
wich is , <span>y = 4
</span></span>substitute into one of the original equations
<span>- x + 2y - 5z = 17</span> 
<span>- x + 2(4) - 5(- 2) = 17</span> 
<span>- x + 18 = 17</span> 
<span>- x = - 1</span> 
<span>x = 1</span> 
<span>which is , </span><span>(x, y, z) = (1, 4, - 2)</span><span> 
</span>Does 2(1) + 4 + 3(- 2) = 0<span> ? Yes</span><span>

</span>
You might be interested in
V+5+9v-9 what’s the answer
Luda [366]

Answer:

-4+10v

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
49/n = 7/10<br><br> What’s n?
Lady_Fox [76]
The answer should be 70 :)
6 0
3 years ago
Read 2 more answers
Help asap will give brainliest!!!!
GarryVolchara [31]

Answer:

C

Step-by-step explanation:

ley y = f(x) and rearrange making x the subject

y = \frac{1}{x+5} - 1 ( add 1 to both sides )

y + 1 = \frac{1}{x+5} ( multiply both sides by (x + 5)

(y + 1)(x + 5) = 1 ← expand factors using FOIL

xy + 5y + x + 5 = 1 , that is

xy + x + 5y + 5 = 1 ( factor first/second and third/fourth terms on left side )

x(y + 1) + 5(y + 1) = 1 ← factor out (y + 1) from each term on left side

(y + 1)(x + 5) = 1 ( divide both sides by (y + 1) )

x + 5 = \frac{1}{y+1} ( subtract 5 from both sides )

x = \frac{1}{y+1} - 5

Change y back into terms of x with x = f^{-1} (x) , then

f^{-1} (x) = \frac{1}{x+1} - 5 where x ≠ - 1

7 0
3 years ago
Count from 170 through 410 U team tens and hundreds circle at least one benchmark number
mario62 [17]
I might not be understanding what you mean but I think it is by counting 10s. 170,180,190,200,210,220,230,240,250,260,270,280,290,300,310,320,330,410.
5 0
3 years ago
What is 2,168.433 rounded to the nearest mile?
olga nikolaevna [1]

Answer:

Suggestion 13 is a correction of the Constitution of California ordered during 1978, through the drive interaction. The drive was endorsed by California electors on June 6, 1978. It was maintained as established by the US High Court on account of Nordlinger v. Hahn, 505 U.S. 1.Proposition 13 is an amendment of the Constitution of California enacted during 1978, by means of the initiative process. The initiative was approved by California voters on June 6, 1978. It was upheld as constitutional by the United States Supreme Court in the case of Nordlinger v. Hahn, 505 U.S. 1.

8 0
2 years ago
Read 2 more answers
Other questions:
  • HELP!!! Need Help With Homework!
    9·2 answers
  • What is the volume of the frustum? Express the answer in terms of π.
    10·2 answers
  • 25 + 47 is the same as<br>+ 50​
    10·1 answer
  • What is the answer if you cut a clock in half and add up to get the same answere on both sides
    8·1 answer
  • I’m confused. Thanks
    12·1 answer
  • Consider the parallel box plots above. Which statement must be true?
    13·2 answers
  • Pls help me guys!<br> Thanks =D
    11·1 answer
  • What’s the measure of A
    7·1 answer
  • Ratio 5: 12 if there are 50 trucks how many cars are there​
    8·1 answer
  • Help!!!!!!!## plssssss​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!