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
aliina [53]
4 years ago
14

Elimination

Mathematics
1 answer:
SVETLANKA909090 [29]4 years ago
4 0
2x -  4y + 1z = 11 ⇒ 2x - 4y + 1z = 11
1x + 2y + 3z = 9   ⇒ <u>1x + 2y + 3z = 9</u>
3x         + 5z = 12       1x - 2y - 2z = 2
                                                                     1x -  2y - 2z = 2
2x -  4y + 1z = 11                                        <u>-2x + 2y - 2z = -3</u>
1x + 2y + 3z = 9   ⇒ 1x + 2y + 3z = 9                    x - 4z = 1
3x         + 5z = 12 ⇒ <u>3x         + 5z = 12</u>          x - 4z + 4z = 1 + 4z
                                 -2x + 2y - 2z = -3                         x = 1 + 4z
                                                     <u />          1 + 4z - 2y - 2z = 2<u />
                                                               1 - 2y + 4z - 2z = 2
                                                                      1 - 2y + 2z = 2
                                                                    <u>- 1                 - 1</u>   
                                                                          -2y + 2z = 1
                                                                   -2y + 2z - 2z = 1 - 2z
                                                                                  <u>-2y</u> = <u>1 - 2z</u>
                                                                                   -2        -2
                                                                                     y = -0.5 + z
                                                         x + 2(-0.5 + z) - 2z = 2
                                                            x - 1 + z - 2z + 2 = 2
                                                                         x - 1 + z = 2
                                                                         <u>  + 1       + 1</u>
                                                                              x + z = 3
                                                                         x - x + z = 3 - x
                                                                                    z = 3 - x
                                                                      
                                            
<u />
You might be interested in
I need help solving this 9+18s-7s help me solve it out please
melomori [17]

Answer:

9+11s

Step-by-step explanation:

9+18s-7s

=9+11s

You can't add 9 and 11s because they are different variables

4 0
3 years ago
Read 2 more answers
Write a problem that the expression 3(-7) -10+25= -6 coud represent
Finger [1]
Solve the equation and it will add up to -6 so
3×-7=-21
-21-10=-31
-31+25=-6
5 0
3 years ago
Consider the equation 30÷x=6.
8090 [49]
Part A : 30 - x - x - x - x - x - x = 0

^ since 30 divided by 5 is 6, that answer is the same as doing 5 + 5 + 5 + 5 + 5 + 5

- pls comment & correct me if i did smth wrong :’)
7 0
3 years ago
Read 2 more answers
Does anyone know the answer?I am stuck? Please explain it to me!
9966 [12]
We are given the length of AC and AB to be 20 and 6, respectively, so we can subtract 6 from 20 to find BC to be 14 cm.

The circumference of a circle is equal to 2 \pi r

C=2 \pi (14) = 28 \pi

The answer is approximately 87.96 cm
7 0
3 years ago
Read 2 more answers
You want your daily sodium intake to be less than 2300 milligrams. For breakfast, you eat a cereal bar with the nutrition label
ipn [44]

According to the information in the nutritional table, it can be inferred that the amount of milligrams of sodium that we should consume during the rest of the day must be less than 2,175mg,

<h3>How to calculate the amount of sodium we can consume?</h3>

To calculate the amount of sodium that we can consume during the rest of the day after breakfast, we must subtract the value of sodium consumed to the amount of total sodium that we want to ingest as shown below:

  • 2300mg - 125mg = 175mg

According to the above, it can be inferred that after consuming the cereal bar at breakfast, we should consume an amount less than or equal to 2,175mg of sodium in the other meals of the day (lunch, dinner and snacks).

Learn more about sodium in: brainly.com/question/24010534

#SPJ1

8 0
1 year ago
Other questions:
  • The complement of an angle is 30∘ less than twice the angle. Find the angle.<br> degrees
    8·1 answer
  • Your bank statement indicates that you are overdrawn on your checking account by $336. How much must you deposit to bring the ch
    9·1 answer
  • Evaluate each expression 2+-4–4
    15·2 answers
  • Can you help me solve this
    9·2 answers
  • Kyle plays softball. His goal is to have a batting average of .400 or greater by the end of the season. The ratio that relates t
    11·1 answer
  • Trina uses mc025-1.jpg cup of sugar and mc025-2.jpg cup of flour in a recipe. How many cups of sugar would she need if she uses
    7·2 answers
  • Answer fast! Will mark brainliest-- Reflect quadrilateral SQRT over the y-axis. Then translate the new quadrilateral 3 units to
    6·2 answers
  • What is the slope of the line through (-1,2) and (-3,2)
    6·1 answer
  • Write the word sentence as an equation. Then solve. A number divided by -9 is -16.​
    12·1 answer
  • Please say the answer of this<br> 3√5+√5
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!