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kow [346]
3 years ago
7

What is the solution to the system of equations?

Mathematics
2 answers:
o-na [289]3 years ago
7 0

Answer:

x = -5

y = 4

Step-by-step explanation:

3x + 4y = 1    /*(-4)

4x + 5y = 0   /*3

---------------------

-12x - 16y = -4

12x + 15y = 0     +

---------------------

-y = -4

y = 4

---------------------

12x = -15y

12x = -60

x = -5

---------------------

Sonja [21]3 years ago
3 0

Answer: x = - 5

y = 4

Step-by-step explanation:

The given system of linear equations is expressed as

3x + 4y = 1- - - - - - - - - - - - -1

4x + 5y = 0- - - - - - - - - - - -2

We would eliminate x by multiplying equation 1 by 4 and equation 2 by 3. It becomes

12x + 16y = 4- - - - - - - - - - -3

12x + 15y = 0- - - - - - - - - - - -4

Subtracting equation 4 from equation 3, it becomes

y = 4

Substituting y = 4 into equation 1, it becomes

3x + 4 × 4 = 1

3x + 16 = 1

Subtracting 16 from the left hand side and the right hand side of the equation, it becomes

3x + 16 - 16 = 1 - 16

3x = - 15

Dividing the left hand side and the right hand side of the equation by 3, it becomes

3x/3 = - 15/3

x = - 5

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Graph the function f(x)=(−x−4)(x+2).
sleet_krkn [62]

The points of the graph of function be (0,-8) , (1,-15) ,(2,-24).

Given f(x)=(-x-4)(x+2)

We have to first multiply both the expressions to get f(x)

Expression refers to combination of numbers, symbols, variables, etc. It is usually not in equal to form. It expresses the relationship between variables. To find out the graph we need to first points of function.

f(x)=-x^{2} -2x-4x-8

Now we have to add 2x and 4x

f(x)=-x^{2} -6x-8

Put the value of x=0

f(0)=0-0-8

=-8

Put the value of x=1

f(1)=-1-6-8

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Put the value of x=2

f(2)=-4-12-8

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Now plot these points on the graph to get the graph of function f(x)=(-x-4)(x+2).

Learn more about function at brainly.com/question/10439235

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5 0
2 years ago
Which coordinate grid shows Point A at (−0.25, 1.75)?
Levart [38]

Question:

Which coordinate grid shows Point A at (−0.25, 1.75)?

6 0
2 years ago
Find the value of x. Please help me asap ​
marissa [1.9K]
136 = x is the answer
6 0
3 years ago
<img src="https://tex.z-dn.net/?f=%28%20-%208x%7D%5E%7B2%7D%20%20-%205x%20-%206%29%20%2B%20%28%20-%20x%20%7B%20%7D%5E%7B2%7D%20-
Jlenok [28]

Hello! I hope this helps! <33

Answer:

-9x^2-6x-1

Step-by-step explanation:

1.) Remove parantheses

-8x^2-5x-6-x^2-x+5

2.) Group like terms

8x^2-x^2-5x-x-6+5

3.) Add similar elements

-9x^2-5x-x-6+5

4.) Add similar elements

-9x^2-6x-6+5

Answer = -9x^2-6x-6+5

Have a nice day! ;)

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3 years ago
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Airida [17]
She would get there around 3:30pm
8 0
3 years ago
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