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
What is is the value of x if -18/6x=-22
blagie [28]

Answer:

x=22/3 is your answer


7 0
3 years ago
Read 2 more answers
(2*2)^2-(3+(2*2)/(6-4) EXPLAINED PLEASE
Eva8 [605]

PEMDAS is an acronym that refers to the sequence of operations to be employed when solving equations with multiple operations. The solution of the given expression (2×2)² - [3+(2×2)]/(6-4) is 14.

<h3>What is PEMDAS?</h3>

PEMDAS is an acronym that refers to the sequence of operations to be employed when solving equations with multiple operations. PEMDAS is an acronym that stands for P-Parenthesis, E-Exponents, M-Multiplication, D-Division, A-Addition, and S-Subtraction.

As per the rule of PEMDAS, the given expression can be simplified as shown below.

(2×2)² - [3+(2×2)]/(6-4)

Step 1: Solving Parenthesis,

= 4² - (3+4) / (2)

= 4² - 4/2

Step 2: Solving exponents,

= 16 - 4/2

Step 3: Solving Divisions,

= 16 - 2

Step 4: Solving Subtraction,

= 14

Hence, the solution of the given expression (2×2)² - [3+(2×2)]/(6-4) is 14.

Learn more about PEMDAS here:

brainly.com/question/36185

#SPJ1

6 0
1 year ago
Simplify (2*4)−1.
EastWind [94]

The simplification form of the number expression (2⁴)⁻¹ is 1/2⁴ option (B) one over two raised to the fourth power is correct.

<h3>What is an integer exponent?</h3>

In mathematics, integer exponents are exponents that should be integers. It may be a positive or negative number. In this situation, the positive integer exponents determine the number of times the base number should be multiplied by itself.

It is given that:

The number expression is:

= (2⁴)⁻¹

Using the properties of the integer exponent:

= 1/2⁴

The above number is one over two raised to the fourth power

Thus, the simplification form of the number expression (2⁴)⁻¹ is 1/2⁴ option (B) one over two raised to the fourth power is correct.

Learn more about the integer exponent here:

brainly.com/question/4533599

#SPJ1

6 0
2 years ago
They need ​$146,000 for the franchise. They invest in a ​3:6 ​ratio, respectively.
jeka57 [31]

Answer:

Step-by-step explanation:

sum of ratio=3+6=9

Jeff invest=3/9×146,000=146000/3=48666 2/3 $

Trudy invest=6/9×146,000=292,000/3=97,333 1/3 $

6 0
2 years ago
Please Help <br> Which fuction is the inverse of f(x)=50,000(0.8)^x
RUDIKE [14]
D is the correct answer to your question
3 0
3 years ago
Other questions:
  • There were 390 people in a cinema. There were 175 women and 215 men. Work out the percentage of men in a cinema.
    13·2 answers
  • Paige spent 1/5 of an hour playing on her phone. That used up 1/5 of her battery. How long would she have to play on her phone t
    14·1 answer
  • Triangles PIC Included
    15·2 answers
  • Use the explicit formula = 3 − 7( − 1) and
    12·1 answer
  • What is 961,000 estimated
    10·1 answer
  • Pythagorean triples are given by the formulas x2 - y2, 2xy, and x2 + y2. Use the formulas for the Pythagorean triples to find a
    15·1 answer
  • Can someone solve this
    14·2 answers
  • A dance instructor earns $75 for teaching 3 classes. The instructor receives a 10percent raise Enter how much the instructor ear
    6·2 answers
  • PLEASE HELP ASAP!!! i’ll mark brainlest
    6·1 answer
  • Pls help extra points and mark brainlist
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!