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
jenyasd209 [6]
3 years ago
12

9. Solve the following system of equations. x + 2y − 6 = z 3y − 2z = 7 4 + 3x = 2y − 5z A. x = 0, y = 5, z = 4 B. C. D. x = 2, y

= 1, z = 2
Mathematics
1 answer:
Inessa [10]3 years ago
4 0
X + 2y - 6 = z..........x + 2y - z = 6
3y - 2z = 7
4 + 3x = 2y - 5z.....3x - 2y + 5z = -4

x + 2y - z = 6.....multiply by -3
3x - 2y + 5z = -4
---------------------
-3x - 6y + 3z = -18 (result of multiplying by -3)
3x - 2y + 5z = -4
--------------------add
-8y + 8z = - 22

-8y + 8z = -22
3y - 2z = 7 .....multiply by 4
----------------
-8y + 8z = -22
12y - 8z = 28 (result of multiplying by 4)
----------------add
4y = 6
y = 6/4 reduces to 3/2

-8y + 8z = -22
-8(3/2) + 8z = -22
-12 + 8z = -22
8z = -22 + 12
8z = -10
z = -10/8 reduces to -5/4

x + 2y - 6 = z
x + 2(3/2) - 6 = -5/4
x + 3 - 6 = -5/4
x - 3 = -5/4
x = -5/4 + 3
x = -5/4 + 12/4
x = 7/4

solution is (7/4, 3/2, -5/4).....x = 7/4, y = 3/2, and z = -5/4
You might be interested in
If a bloodstain has a length of 3.0cm and a width of 1.5cm what is the angle of impact?
zalisa [80]

The angle of impact is 30°

<h3>What is the angle of impact?</h3>

In a bloodstain, the angle of impact can be used to determine the appearance of the resulting bloodstain if the bloodstain has a tail or pattern.

  • Bloodstain pattern analysis is the study of bloodstains at a scene of the crime in an attempt to reconstruct the events that resulted in the bloodshed.

Mathematically;

\mathbf{Angle  \ of \  impact = sin^{-1} (\dfrac{width \ stain}{length \ stain} )}

\mathbf{Angle  \ of \  impact = sin^{-1} (\dfrac{1.5}{3.0} )}

\mathbf{Angle  \ of \  impact = 30 ^0}

Learn more about the angle of impact here:
brainly.com/question/19423063

6 0
2 years ago
Plss help, ill give brainiest
White raven [17]

Answer:

A

Step-by-step explanation:

Cylinder volume= V = π r ^2 h

So you times Pie by the radius (diametre divided by two- 3.5) you then square this. After that, times it by the height (10)

So the volume is 384.85.

You then find 30% of this, so times 384.85 by 30%.

You then get an answer of 115.455, and this is equal to A.

I hope this helps, have a lovely day.

5 0
2 years ago
What is a recriprocal of 25
Arturiano [62]

Answer:

1/25

The fraction for 25 would be 25/1 so the recripocal of 25/1 would be 1/25. The reciprocal is the numerator and denominator switched.

8 0
2 years ago
Read 2 more answers
The formula for a trapezoid relates the area A, the two bases, a and b, and the height, h.
saveliy_v [14]
I'm assuming the original equation is A= \frac{h(a+b)}{2}
Step 1: Multiply both sides by 2 to eliminate the denominator
Step 2: divide by h
Step 3: subtract a
b= \frac{2A}{h} -a
7 0
2 years ago
Convert 88 gallons per minute to liters per second
juin [17]
5.55 liters per second
5 0
2 years ago
Other questions:
  • On a snorkeling trip,Antonia dove at least 7 times as deep as Lucy did. If Antonia dove 35 feet below the oceans surface,what wa
    10·2 answers
  • 22 POINTS: look at image helpppppp :)))))))
    8·2 answers
  • What is$1200,3.9%,8 months
    14·1 answer
  • G^5/G^5 <br><br> Please help!!
    13·1 answer
  • What is the explicit rule for the sequence on which the series is based?<br> -Thank you :)
    14·1 answer
  • Please I need help for real
    10·1 answer
  • Can someone help me please!!!!!!!
    11·1 answer
  • What is the volume of the triangular prism below?
    5·1 answer
  • The length of the floor is 32 m longed than it’s witdth and there is greater than 200 square meters. You will cover the floor co
    6·1 answer
  • 12. The mean number of boxes of cookies sold by
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!