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
S_A_V [24]
2 years ago
11

3x+y=85x+y=10please help me Brainly sir ​

Mathematics
2 answers:
Svet_ta [14]2 years ago
8 0

Answer:

X = 1

Y = 5

Step-by-step explanation:

we have to figure out what x and y = that make both answers correct

3 x 1 = 3

3 + 5 = 8

That means that the first equation is right with X = 1 and Y = 5

Let's see the second equation

5 x 1 = 5

5 + 5 = 10

That means both equations are right so the answer would be

X = 1 and

Y = 5

solong [7]2 years ago
5 0

<u>Method of Elimination:</u>

Given pair of linear equations are:

3x+y = 8 — — —Eqn(i)

On comparing with a₁x+b₁y+c₁ = 0

Where,

  • a₁ = 3,
  • b₁ = 1, &
  • c₁ = 8

5x+y = 10 — ——Eqn(ii)

On comparing with a₂x+b₂y+c2₂ = 0

Where,

  • a₂ = 5,
  • b₂ = 1, &
  • c₂ = -10

a₁/a₂ = 3/5

b₁/b₂ = 1/1= 1

c₁/c₂ = 8/10=4/5

We have,

a₁/a₂ ≠ b₁/b₂ ≠ c₁/c₂

So, Given pair of linear equations in two variables have a unique solution.

Now,

On Subtracting eqn(ii) from eqn(i) then

3x+y = 8

5x+y = 10

(-)

________

-2x+0 = -2

_________

⇛-2x = -2

⇛2x = 2

⇛x = 2/2

⇛x = 1

On Substituting the value of x in eqn(i) then

⇛3(1)+y = 8

⇛3+y = 8

⇛y = 8-3

⇛y = 5

Therefore , The solution = (1,5)

<u>Additional</u><u> comment</u><u>:</u>

  • If a₁x+b₁y+c₁ = 0 and a₂x+b₂y+c₂ = 0 are pair of linear equations in two variables then
  • If a₁/a₂ ≠b₁/b₂ ≠ c₁/c₂ then they are Consistent and independent lines or Intersecting lines and they have a unique solution.
  • If a₁/a₂ = b₁/b₂ = c₁/c₂ then they are Consistent and dependent lines or Coincident lines and they have infinitely number of many solutions.
  • If a₁/a₂ =b₁/b₂ ≠ c₁/c₂ then they are Inconsistent lines or Parallel lines lines and they have no solution.
You might be interested in
John took a math test and got 19 out of 25 questions correct. What percent of the questions did he answer correctly ?. Single ch
Gnoma [55]

Answer:

76%

Step-by-step explanation:

  • Start with the fraction \frac{19}{25}
  • Get the denominator to 100 by multiplying both the numerator ad denominator by 4
  • This will give you the fraction \frac{76}{100}
  • This can be turned into 76%
4 0
2 years ago
Read 2 more answers
At an amusement park, 8 out of 80 tickets sold were discount tickets. What percentage of the tickets were discount tickets?
bixtya [17]
10%

8 / 80 = .1 move your decimal =10%
7 0
2 years ago
The school band played at a festival on tuesday the band started playing at 3:48 pm and stopped playing at 6:38 pm how long did
UNO [17]

Answer:

rwqrqwrq

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Use a 70% discount coupon or 40%, then 20%, then 10% on your whole purchase?
vredina [299]
It would add up to 70% ?
6 0
2 years ago
A sweater for 36.00 at 7% sales tax
blagie [28]
$36 x 1.07 = $38.52
The cost will be $38.52
Tax on this is $2.52
4 0
3 years ago
Other questions:
  • Give two details to support this statement: Keeping your nails trimmed to the right length is important. BTW in the picture ther
    10·1 answer
  • A bag contains five ​batteries, all of which are the same size and are equally likely to be selected. Each battery is a differen
    9·1 answer
  • You flip a fair coin.
    8·1 answer
  • Evaluate y=3x for x=2
    5·2 answers
  • Name a pair of supplementary angles
    9·2 answers
  • The length around a circle is called the
    7·1 answer
  • Who’s Candice???????????????
    13·2 answers
  • Area of hexagon a.288. B48 c64
    7·1 answer
  • What is the area of the regular polygon?<br> 6 m
    10·1 answer
  • Sally wants to purchase D dozen donuts for $4.50 each and B boxes of cookies for $2.25 each. She can spend at most $30. Which in
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!