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
Margarita [4]
3 years ago
15

Solve the system of equations - 8x - 5y = -13 and - 4x – 5y = 11 by combining the equations.

Mathematics
2 answers:
Natalija [7]3 years ago
5 0

Answer:

Your solution is (6, -7).

Step-by-step explanation:

Combining the equations is also known as substitution. This is done when you substitute one variable into another equation.

-8x - 5y = -13

-4x - 5y = 11

Let's change the second equation into one with one variable on each side.

-5y = 4x + 11

y = -4/5x - 11/5

Now, plug this into your first equation.

-8x - 5(-4/5x - 11/5) = -13

Distribute the -5 sign.

-8x + 4x + 11 = -13

Combine the like terms.

-4x + 11 = -13

-4x = -24

Isolate x by dividing both sides by -4.

x = -24/-4

x = 6

Now plug this back into either equation.

y = -4/5(6) - 11/5

Multiply.

y = -24/5 - 11/5

Subtract.

y = -35/5

Simplify.

y = -7

Your solution is (6, -7).

Check this by plugging in these values into the equation you have not checked yet.

-8(6) - 5(-7) = -13

-48 + 35 = -13

-13 = -13

Your solution is correct.

Hope this helps!

Citrus2011 [14]3 years ago
4 0

Answer:

(6,-7)

Step-by-step explanation:

subtract them:

-8x - 5y = -13

-4x - 5y = 11

you get

-4x = -24

so x = 6

plug x into the second equation:

-24 - 5y = 11

-5y = 35

y = -7

so your solution is (6,-7).

You might be interested in
im confused with this please help i dont get any answers, it is about rounding, not sure why this question is confused
Shkiper50 [21]

Step-by-step explanation:

<u>13,789:</u>

Tens: 13,790

Hundreds: 13,800

Thousands: 14,000

Ten thousands: 10,000

<u>24,173:</u>

Tens: 24,170

Hundreds: 24,200

Thousands: 24,000

Ten thousands: 20,000

<u>861,630:</u>

Tens: 861,630

Hundreds: 861,600

Thousands: 862,000

Ten thousands: 860,000

7 0
2 years ago
Help me please and thank you.
dezoksy [38]

Answer:

0.67x-2=0.43

Step-by-step explanation:

2/3 = 0.6 repeating

3/7 = 0.42857

7 0
3 years ago
PLS HELP ASAP ILL GIVE BRAINLKEST PLS THANKS ASAP PLS
kherson [118]
Answer
2nd one
(2,-2) ordered pair -4 y-intercept
7 0
3 years ago
Read 2 more answers
For the linear equation y = mx + b, what does b represent
notka56 [123]

Answer:

Initial Value / Starting Point

Step-by-step explanation:

Slope-intercept form of a linear equation is y=mx+b where m is the slope and b is the y-intercept, or the initial value.

7 0
2 years ago
Read 2 more answers
2x(9x^2+5y) polynomial operations
Annette [7]
Mathpapa will give you the answer to this and explain the steps!
6 0
3 years ago
Other questions:
  • a tour bus cost $75 plus $6 for each passenger. write and evaluate an expression to find the total cost for 25 passengers. then.
    5·1 answer
  • What is the value if 3^0
    11·1 answer
  • Eduardo bought one dozen bunches of
    12·1 answer
  • For each triangle below find the side that marked with the letter.
    13·1 answer
  • LOOK AT PICTURE ↓↓↓↓↓↓↓↓↓↓↓
    12·1 answer
  • A middle school team scored three field goals worth three points each and two touchdowns worth six points with a single extra po
    14·1 answer
  • a bookstore owner asks every fifth customer on a single day if he or she owns a e-book reader . select yes or no for each questi
    7·1 answer
  • Dose this table represent a function?
    8·1 answer
  • Work out the area of the shaded shape on the cm grid. State the units with your answer
    11·1 answer
  • Find the volume of the composite figure below round your answer to the nearest whole number
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!