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
Andrei [34K]
3 years ago
12

  PLZZZZZZZ HELPP  Which ordered pair is the solution to the system of equations? {y=2x−15} {4x+3y=−5} (5, −5) (4, −7) (0, 6) (7

, −11)
Mathematics
1 answer:
Sophie [7]3 years ago
8 0

solution is (4, - 7 )

given the equations

y = 2x - 15 → (1)

4x + 3y = - 5 → (2)

substitute y = 2x - 15 into (2)

4x + 3(2x - 15) = - 5

4x + 6x - 45 = - 5

10x - 45 = - 5 ( add 45 to both sides )

10x = 40 ( divide both sides by 10 )

x = 4

substitute x = 4 into (1) for corresponding value of y

y = (2 × 4 ) - 15 = 8 - 15 = - 7

solution is (4, - 7 )


You might be interested in
Plz help me cant understand
Pachacha [2.7K]
I hope this helps you

7 0
3 years ago
What is the hyperbola 25x^2-100y-9y^2-90x-350=0 in standard form?
sergij07 [2.7K]
WE need to complete the square on the x and y terms:-

25x^2 - 100x - 9y^2 - 90y = 350
25(x^2 - 4x +    ) - 9(y^2 + 10x       )  =   350 + 25(  )  - 9(  )
25(x^2 - 4x  + 4 ) - 9(y^2 + 10x  + 25)  = 350  + 25(4)  - 9(25)
25(x - 2)^2 - 9(y + 5)^2 = 

25(x - 2)^2   -  9(y + 5)^2          =  225
----------------    --------------            --------
    225                 225                    225

  ( x  - 2)^2         (y + 5)^2  
  -------------   -   --------------  =    1         Answer
        9                    25                               



4 0
3 years ago
Which equation has a constant of proportionality equal to 8?
tiny-mole [99]
B is the right answer for you question
8 0
3 years ago
3 divided by the sum of x and 9
Leto [7]

Answer:3/9

Step-by-step explanation:

5 0
3 years ago
What does x equal if 2x + 4x + 108?<br> 2x \ 4x + 108<br> _________\__________
natali 33 [55]

Answer: x = -54

Step-by-step explanation:

Simplifying

(2x) = (4x + 108)

Reorder the terms:

(2x) = (108 + 4x)

Remove parenthesis around (108 + 4x)

(2x) = 108 + 4x

Solving

(2x) = 108 + 4x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4x' to each side of the equation.

(2x) + -4x = 108 + 4x + -4x

Combine like terms: (2x) + -4x = -2x

-2x = 108 + 4x + -4x

Combine like terms: 4x + -4x = 0

-2x = 108 + 0

-2x = 108

Divide each side by '-2'.

x = -54

5 0
3 years ago
Other questions:
  • Triangle RST was dilated with the origin as the center of dilation to create triangle
    15·1 answer
  • PLeAsEeeeEeEeeEeEEeEeeeEee. help me with my last questions
    9·2 answers
  • Help with Pythagorus 3D maths homework really fast please!!!!!!<br> Awarding brainliest
    7·1 answer
  • The cost of buying our Stats book online is represented by the 8 sample purchases (in dollars) below: 67.99 78.99 68.99 84.36 80
    10·1 answer
  • Find the GCF of 40 and 63 using lists of factors
    8·1 answer
  • If two lines are perpendicular , what do we know about their slopes ?
    15·1 answer
  • The commuting distances, in miles, of 10 employees were used to make the box plot shown above. Which of the sets of distances be
    10·2 answers
  • PLEASE HELPPP ITS A TEST THAT IS DUE IN LIKE 20 MIN THIS IS THE LAST QUESTION.
    9·2 answers
  • Use angle relationships to find the value of x.
    14·2 answers
  • The sum<br> of three consecutive integers is 132. What are the three integers?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!