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
Eduardwww [97]
2 years ago
14

1) 2x – 3y - z = 7

Mathematics
1 answer:
m_a_m_a [10]2 years ago
5 0

Answer:

x = 3

Step-by-step explanation:

2x - 3y - z = 7 (equation 1)

3x + 5y - 3z = -2 (equation 2)

4x – y + 2z = 17 (equation 3)

(1) * 3 : 6x - 9y - 3z = 21 (1)'

(1)' - (2) :  3x - 14 y = 23 (equation 4)

(1) * 2 : 4x - 6y - 2z = 14 (1)"

(1)" + (3) : 8x - 7y = 31 (equation 5)

(5)*2 : 16x - 14y = 62 (5)'

(5)' - (4) : 13x = 39

              x = 3

So thus, x = 3 in this system of equations, you can plug x back into equation 4 or 5 to find y and then plug x and y back into equations 1, 2, or 3 to find z

You might be interested in
Anyone know how to find the length of x using the 30,60,90 method?
QveST [7]

9514 1404 393

Answer:

  2√5

Step-by-step explanation:

The side ratios in a 30-60-90 triangle are ...

  1 : √3 : 2

The longest side (x) is 2 times the length of the shortest side (√5), so ...

  x = 2√5

6 0
3 years ago
Read 2 more answers
FASTEST WITH EXPLAINATION ANSWER GETS BRAINLIEST
castortr0y [4]

Answer:

explanation to what

Step-by-step explanation:

6 0
3 years ago
Decide whether the equations is a trigonometric function identity, EXPLAIN.
hodyreva [135]

(1) Answer: Identity true

\cos^2x(1+\tan^2x)=\cos^2x(1+\frac{sin^2x}{cos^2x})=\\= \cos^2x\frac{cos^2x+sin^2x}{cos^2x}=1

(2) Answer: Identity true

\sec x \tan x(1-\sin^2x)=\sin x\\\frac{1}{\cos x}\frac{\sin x}{\cos x}(\cos^2x)=\sin x\\\sin x = \sin x


(3) Answer: Identity true

\sin^2(\theta)\csc^2(\theta)=\sin^2(\theta)+\cos^2(\theta)\\\sin^2(\theta)\frac{1}{\sin^2(\theta)}=\sin^2(\theta)+\cos^2(\theta)\\1 = 1


7 0
3 years ago
Probability theory predicts that there is a 22.4% chance of a particular soccer player making four penalty shots in a row. If th
emmasim [6.3K]
If there is a 22.4% chance that a soccer player will make 4 shots in a row, then the probability that he/she WON'T make 4 shots in a row is...

100 -22.4 = 77.6%

So the number of simulations that he/she will miss at least one shot in 2500 simulations would be...

2500 x 77.6% =
2500 x .776 = 1940 
5 0
3 years ago
Read 2 more answers
What is pi times 4 squared times 5
ehidna [41]

Answer:

251.428

Step-by-step explanation:

22/7*4^2*5

1760/7

251.428

3 0
3 years ago
Read 2 more answers
Other questions:
  • 10) Solve the equation for the variable "a":<br> 2(x + a) = 4b
    11·1 answer
  • Identify the number of solutions or zeros<br><br> 2x^2+5x-9=0
    14·1 answer
  • 2 ( t-3) &gt; 2t-8, what is the correct answer
    13·1 answer
  • Can someone please help me with this question
    8·1 answer
  • I need help with this
    6·2 answers
  • You roll a 6 sided die. What is P(roll great her than 4)? If necessary round your answer to 2 decimal place
    12·1 answer
  • A baseball field is being constructed. The builders noticed that the batters would have the sun in their eyes when batting from
    9·1 answer
  • Question 4 pleaseeee
    5·2 answers
  • 2. How are rectangles and paralelograms diferent?
    8·1 answer
  • Help me plsssssssssss agian
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!