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
agasfer [191]
3 years ago
8

What is x-2y=-1 and 2x+y=4 using elimination step by step

Mathematics
1 answer:
otez555 [7]3 years ago
5 0

Answer:

x = 7/5  , y = 6/5

Step-by-step explanation using elimination:

Solve the following system:

{x - 2 y = -1 | (equation 1)

2 x + y = 4 | (equation 2)

Swap equation 1 with equation 2:

{2 x + y = 4 | (equation 1)

x - 2 y = -1 | (equation 2)

Subtract 1/2 × (equation 1) from equation 2:

{2 x + y = 4 | (equation 1)

0 x - (5 y)/2 = -3 | (equation 2)

Multiply equation 2 by -2:

{2 x + y = 4 | (equation 1)

0 x+5 y = 6 | (equation 2)

Divide equation 2 by 5:

{2 x + y = 4 | (equation 1)

0 x+y = 6/5 | (equation 2)

Subtract equation 2 from equation 1:

{2 x+0 y = 14/5 | (equation 1)

0 x+y = 6/5 | (equation 2)

Divide equation 1 by 2:

{x+0 y = 7/5 | (equation 1)

0 x+y = 6/5 | (equation 2)

Collect results:

Answer: {x = 7/5  , y = 6/5

You might be interested in
Choose the most appropriate answer area(26 centimeters),""area(26),"and”a(26)” all represents which of the following?
garri49 [273]

Answer:

B. The area of 26 meters.

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
How do I do an exponent with a letter variable in it?
WARRIOR [948]
First you transform the expression and then evaluate the power

7 0
3 years ago
Select the correct answer.
antoniya [11.8K]

The range of the function shown on the graph (see attachment) is: D. -9 ≤ y ≤ 8.

<h3>What is a range?</h3>

A range can be defined as the set of all real numbers that connects with the elements of a domain. This ultimately implies that, a range refers to the set of all possible output numerical values, which are shown on the y-axis of a graph.

<h3>How to identify the range of this graph?</h3>

The vertical extent of a graph represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.

By critically observing the graph shown in the image attached below, we can reasonably infer and logically deduce the following:

Range = [-9, 8]

In interval notation, the range of this graph can be rewritten as -9 ≤ y ≤ 8.

Read more on range here: brainly.com/question/16610662

#SPJ1

<u>Complete Question:</u>

Select the correct answer.

A graph plots two points at (negative 7, 8) and (negative 2, negative 9) on the x y coordinate plane. A diagonal curve connects both points.

What is the range of the function shown on the graph above?

A. -7≤y≤-2

B.-8≤y≤8

C.-2≤y≤-7

D. -9≤y≤8

4 0
1 year ago
Find the real solutions of the following equation.<br> If K= x + 1/x-1 <br> and k^2- k=20, find x.
ser-zykov [4K]
X
=
k
2
+
1
2
First one……..
4 0
3 years ago
What is 2-5(94)/2 plz help
Zarrin [17]

Answer:

= -223

Step-by-step explanation:

hope this will help u mate :)

#shadow

8 0
3 years ago
Other questions:
  • Find the mean for the given set of data.
    15·2 answers
  • Kris is staining 30 wooden rectangular fence pieces. The fence pieces are different sizes, and Kris wants
    9·1 answer
  • Help me please, Find a, b, and c.
    14·2 answers
  • Find the exact length of the third side
    11·1 answer
  • I really need help on this I have no clue how to do this and my new teacher have a foreign accent so I can’t understand her
    14·1 answer
  • Verify sin^4 x - sin^2 x = cos^4 x - cos^2 x is an identity
    5·1 answer
  • PLEASE HELP :(!!!!!!!!
    15·1 answer
  • Can someone help me please
    15·1 answer
  • S x + y = 10<br> x = 2y + 1
    11·1 answer
  • (Arithmetic Sequence)<br><br> Why does it keep saying I’m wrong? Is there something I’m missing?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!