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
sergey [27]
3 years ago
14

3x-y=11 2x+5y=-4 systems of linear equations using substitution find X and Y

Mathematics
1 answer:
ohaa [14]3 years ago
3 0
The answer is x = 3, y = -2

The system of equations is:
3x - y = 11
2x + 5y = -4
_________
Rewrite the first equation:
y = 3x - 11
_________
Substitute y in the second equation and solve x:
2x + 5(3x - 11) = -4
2x + 5 * 3x + 5 * (-11) = -4
2x + 15x - 55 = -4
17x = 55 - 4
17x = 51
x = 51 / 17 
x = 3
_______
Substitute x in the equation: y = 3x - 11
y = 3 * 3 -11
y = 9 - 11
y = -2
You might be interested in
Solve the proportion 20/16=X/80<br><br> A=6.25<br> B=1600<br> C=100<br> D=160
mamaluj [8]
C. 100 is the aswer i thinck
7 0
3 years ago
2x+8y = 6<br> 15x + 20y = 15
Likurg_2 [28]

Answer:

The solution is (0, 3/4)

Step-by-step explanation:

Please copy and share the instructions.  Here they are:  Solve the following system of linear equations.

Both of the equations can be reduced (simplified):

2x+8y = 6            =>  x + 4y = 3

15x + 20y = 15     => 3x + 4y = 3

Let's use the elimination by addition and subtraction method.  Multiply the first equation by -1, obtaining

                                 -x - 4y = -3

Add the second       3x + 4y = 3

equation to the

first.

We get:                       2x = 0.

Thus, x = 0.  Substituting 0 for x in the 1st original equation yields:

2(0) + 8y = 6.  Then y = 6/8, or y = 3/4.

The solution is (0, 3/4).

4 0
3 years ago
Which values are solutions to the inequality below? Check all that apply.
inn [45]

Answer:

c.

Step-by-step explanation:

That is the only answer choice that makes the most sense.

±10 = √100; in this case, they want the non-negative value, so it is 10.

7 0
3 years ago
Read 2 more answers
Byron’s income last year was $61,700. He made $48,000 at his plumbing job and had income from an apartment that he rented out. I
cricket20 [7]
Total income minus income from plumbing gives us income from rent.  Divide that by 12 to give us the monthly income from rent.

61700-4800 = 13700

13700/12 = 1,141.67 a month in rent.
6 0
3 years ago
Read 2 more answers
PLEASE HELP ME IM OFF PACE
denpristay [2]

select the one that says "no, the estimate should be higher."

7 0
3 years ago
Read 2 more answers
Other questions:
  • 2x(x^4-x^2-6) what is the answer to this when foiled?
    12·1 answer
  • Pls help me for this
    6·1 answer
  • URGENT 23-28 with work
    14·1 answer
  • If the family decides to fly, they know that they will need a rental car for at least part of their trip. Gabriela and Luis esti
    7·1 answer
  • Which two units you would use to measure population density?
    11·1 answer
  • What is 2/3 into a decimal
    13·2 answers
  • Help I don’t know the answer
    13·2 answers
  • Mrs. C loans Mr. R $50 000 to start his magic shop. She charges him 20% interest compounded anually. how much will he own her in
    11·2 answers
  • Expanding triple brackets, i will give brainliest
    10·1 answer
  • What is the equation of the line –3x–2y=30 in slope-intercept form?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!