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
IRISSAK [1]
2 years ago
15

Solve 3x – y + 2z = 6 -x + y = 2 x – 2z = -5

Mathematics
1 answer:
posledela2 years ago
3 0

Answer:

Step-by-step explanation:

3x – y + 2z = 6 - - - - - - - - - 1

-x + y = 2 - - - - - - - - - - - - -2

x – 2z = -5 - - - - - - - - - - - -3

From equation 2, x = y - 2

From equation 3, x = 2z - 5

Substituting x = y - 2 and x = 2z - 5 into equation 1, it becomes

3(y - 2) – y + 2z = 6

3y - 6 - y + 2z = 6

3y - y + 2z = 6 + 6

2y + 2z = 12 - - - - - - - - - 4

3(2z - 5) – y + 2z = 6

6z - 15 - y + 2z = 6

- y + 6z + 2z = 6 + 15

- y + 8z = 21 - - - - - - - - - - 5

Multiplying equation 4 by 1 and equation 5 by 2, it becomes

2y + 2z = 12

- 2y + 16z = 42

Adding both equations

18z = 54

z = 54/18 = 3

Substituting z = 3 into equation 5, it becomes

- y + 8×3 = 21

- y + 24 = 21

- y = 21 - 24 = - 3

y = 3

Substituting y = 3 into equation 2, it becomes

-x + 3 = 2

- x = 2 - 3 = -1

x = 1

You might be interested in
Evaluate (4p)3 when p = (-1)
Leona [35]

Answer:

-12

Step-by-step explanation:

plug in -1 into the equation which is going to be (4*-1)3

you multiply what is in the parenthesis first and after is going to be (-4)3

lastly your going to multiply -4*3 and it is going to equal to -12.

3 0
2 years ago
Lori is 6 years
Delicious77 [7]

Answer:

12:6

Step-by-step explanation:

6 times 2 because Lori is six and her cousin is twice her age (hope it helps)

7 0
2 years ago
Someone help pls I’ll mark brainliest if u give a small explanation! :)
marishachu [46]

Answer:

108 inches^2

Step-by-step explanation:

Multiple each side by 1.5

8x1.5=12

6x1.5=9

then to find the area, multiply the sides together.

4 0
2 years ago
Read 2 more answers
Find the missing angle measure(s).<br> 120°<br> IX<br> 70°<br> Yº<br> 50°<br> Task Card #4
Lynna [10]

y=70(vertically opposite angle)

70+50+X =180 (sum of angles in triangles)

120+x=180

X=60 //

6 0
2 years ago
Hey can you please help me posted picture of question
juin [17]
For this case we can have the following function:
 r = f (t)
 Where,
 Independent variable is t.
 Dependent variable is r.
 To find the inverse we solve for the independent variable, that is, the data entry variable.
 Answer:
 
FALSE
 
option B
6 0
3 years ago
Other questions:
  • What the heck is 1+1 equal. Please explain.
    8·2 answers
  • Answe these two, please show your work
    8·2 answers
  • What is the measure of angle 1
    14·1 answer
  • Which equation has a constant of proportionality equal to 2?
    10·2 answers
  • Find the values of x and y.
    15·2 answers
  • I give brainliest! A person is going 80 miles per hour. How long does it take for the person to go 80 miles?
    13·2 answers
  • K is between P and Q. Suppose PQ- 10x - 16, PK - 6x + 8, and KQ-8. What is PQ?
    5·1 answer
  • A rectangle has side lengths, L and W, and a diagonal, d.
    13·2 answers
  • Determine the perimeter and area of a rectangle with lengh 28.3 feet and width 37.25 feet. Round your answers to the nearest hun
    13·1 answer
  • 3. In AABC, a = 35, c = 25, and m can be drawn given these measurements?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!