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
aleksklad [387]
3 years ago
11

Which equation would be the easiest to solve first by using the substitution method? EXPLAIN WHY

Mathematics
1 answer:
Arlecino [84]3 years ago
6 0

Answer:

Equation 2: x - 2y = 1

Step-by-step explanation:

The equations easiest to use substitution are the ones that have the variable multiplied by one, as in the case of Eq. 2 where x is 1x, so if you substitute a zero for x, we know that y has to be -1/2 for the equation to be true.  Furthermore, if you substitute a 0 for y you automatically know that x = 1.

If you try to substitute anything for x in equation 1, let's say x = 1, you still have to multipy by 3, then the rest of the problem would be more steps.

You might be interested in
Elimination
SVETLANKA909090 [29]
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 />
4 0
3 years ago
A man bought a refrigerator, an air conditioner, a TV set and a gas cooker for $150.00, $400.00, $180.00 and $300.00 respectivel
MaRussiya [10]

Answer:

1184.5

Step-by-step explanation:

150+400+180+300=1030

1030 × 15% = 154.5

(15% is also 0.15)

1030 + 154.5 = 1184.5

I hope this helps you :)

4 0
3 years ago
What is an orgasim? I really dont know
Oksana_A [137]

Answer:

An orgasm is a feeling of intense pleasure that happens during sexual activity. It's sometimes called coming or climaxing.

Step-by-step explanation:

6 0
3 years ago
“When I left the house this morning, I noticed that I was short on cash,” Gary said. “I spent one-half of what I had on my train
nexus9112 [7]
I don't know the answer
8 0
3 years ago
Is (–28, 92) a solution to the equation y = 92?
lesya692 [45]

Answer:

yes

Step-by-step explanation:

the second number in a set of parenthesis is the y value and the number in the parenthesis is 92 which makes y=92 true

5 0
2 years ago
Other questions:
  • A group of college students built a self-guided rover and tested it on a plane surface. They programmed the vehicle to move alon
    6·2 answers
  • 5.<br> How would you simplify the fraction 4/28?<br> 0<br> 0<br> 0<br> 0
    15·2 answers
  • Calculate the length of the hypotenuse
    5·1 answer
  • Find a linear equation to model this real-world application:
    10·1 answer
  • Marie will earn $15 per hour at a new job. During training, she will earn $10 per hour. What percent of Marie's regular rate wil
    12·1 answer
  • 25+ -8 equals I really need help
    5·2 answers
  • Find the value of x round to the nearest tenth 17 to 47
    6·1 answer
  • Find the measure of angle R
    6·1 answer
  • 2. The following data set shows the number of points scored by rugby team in season of matches: (5
    15·1 answer
  • Find the graph for the equation y=|x-3|-6?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!