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
kogti [31]
2 years ago
9

2x-y=4 and y=-2x+8. Can anyone help me solve

Mathematics
2 answers:
Komok [63]2 years ago
5 0

Answer:

The correct answer is x = 3 and y = 2.

Step-by-step explanation:

There are many ways to solve systems of equations like this, but I'm going to use substitution.  This means taking the value of y given by the second equation and plugging it into the first equation.  This is modeled below:

2x - y = 4

2x - (-2x+8) = 4

Now, we can simplify the left side of the equation.

2x + 2x - 8 = 4

4x - 8 = 4

We should add 8 to both sides as the next step.

4x = 12

Now we can divide by 4.

x = 3

To solve for y, we can substitute this value found for x back into either one of our original equations.

y = -2x + 8

y = (-2*3) + 8

y = -6 + 8

y = 2

Therefore, the correct answer is x = 3 and y = 2.

Hope this helps!

musickatia [10]2 years ago
3 0

Answer:

The value of x is 3 and y is 2

Step-by-step explanation:

Here, 2x - y = 4 and y = -2x + 8 are two given equation,

Now, We will use <em><u>Substitution </u></em><em><u>Method</u></em>

2x - y = 4 ...(1)

y = -2x + 8 ...(2)

Substitute the value of <u>y = -2x + 8</u> in equation (1)

2x - y = 4

2x - (-2x + 8) = 4

2x + 2x - 8 = 4

4x - 8 = 4

Add 8 both side we get,

4x - 8 + 8 = 4 + 8

4x = 12

Divide by 4 both side we get,

4x/4 = 12/4

x = 3

Now, Substitute the value of x in equation (2)

y = -2x + 8

y = -2(3) + 8

y -6 + 8

y = 2

Thus, The value of x is 3 and y is 2

<h3><u>FOR VERIFICATION ONLY:</u></h3>

<u>2x - y = 4</u>

2(3) - (2) = 4

6 - 2 = 4

4 = 4

<u>y = -2x + 8</u>

2 = -2(3) + 8

2 = -6 + 8

2 = 2

Hence, L.H.S = R.H.S

<u>-TheUnknownScientist</u>

You might be interested in
The temperature at noon on Monday
Effectus [21]

Answer:

There was a 5% change

Step-by-step explanation:

On Monday, the temperature was 80.

On Tuesday, the temp was 77

On Wednesday, the temp was 84

there was a difference of 4

4 is 5% of 80

3 0
2 years ago
What is the equation of a line that goes through the point (0,2) and has a slope of -1 ?
OLEGan [10]

Answer: <u><em>A, because when x=1/-1 you don't need to write down the one meaning it is -x and then +2 is the y which means the full answer is y=-x+2</em></u>

8 0
3 years ago
Please help ASAP!!!
QveST [7]
The answer is 3. 1/6 because there are 6 sides in the cube. So the probability of getting a certain number is 1/6.
7 0
3 years ago
B) what is the mean<br>C) what is the standard deviation ​
mina [271]
The mean is the average.

i’ve found this a helpful way to remember:
the medians the middle
the mean old average
7 0
3 years ago
Yo givin brainiest !!
VikaD [51]

Answer:

C arithmetic

Step-by-step explanation:

-2,0,2,4,6

To get from the first term to the second term, we add 2

To get from the second term to the third term, we add 2

To get from the third term to the fourth term, we add 2

The common difference is 2

This is an arithmetic sequence.

There is no single number we can multiply by to move from once term to the next, so it is not a geometric sequence.

8 0
3 years ago
Other questions:
  • What is twelve times six
    15·2 answers
  • I need the answer please help
    10·1 answer
  • How do you solve 5y^2 – 33y + 18 = 0 for y
    11·1 answer
  • *WILL MARK BRAINLIEST!!!!!!*
    14·1 answer
  • Jason cycled for 3 hours. He cycled 7 1/2 miles each hour for the first two hours and the distance he cycled for the third hour
    14·1 answer
  • Plzz help me with this, which one is it?:
    6·2 answers
  • A classroom has an area of and + 15x - 21 and a length of 2x + 7. What is the width of the classroom
    14·2 answers
  • An animal shelter has 36 pets available for adoption. 1/4 of them are puppies. How many are puppies?
    10·1 answer
  • Estimate the perimeter of the figure<br> The perimeter is about ____ units.
    5·1 answer
  • You bought a video game for $35. You got it on sale
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!