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stiks02 [169]
4 years ago
9

Help! 18 points!

Mathematics
2 answers:
Dmitry [639]4 years ago
5 0
C. is the answer bc 3+3x3 is 3 + 9= 12
and -4x3 + 3x3 which is -12 + 9= -3
jasenka [17]4 years ago
3 0

solve x+3y=12 for x

Add -3y to both sides

x+3y+-3y= 12+-3y

x= -3y+12

Substitute -3y+12 for x in -4x+3y= -3

-4x+3y = -3

-4(-3y+12)= + 3y = -3

Simplify both sides of the equation

15y-48= -3

Add 48 to both sides

15y-48+48= -3+48

15y = 45

Divide both sides by 15

15y/15 = 45/15

y= 3

Substitute 3 for y in x = -3y+12

x = -3y+12

x= (-3)(3)+12

 Simplify both sides of the equation

x= 3

Answer : x= 3 and y= 3

                (3,3)

                C is the answer

I hope that's help !


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Use slopes and y-intercepts to determine if the lines 5x-5y=-2 and -x+2y=4
HACTEHA [7]

The given pair of lines are not perpendicular.

<h3>What is a line?</h3>

The line is a curve showing the shortest distance between 2 points.

5x - 5y = -2 - - - - - (1)
Transform the equation into standard form,
5x + 2 = 5y
y = 5x /5 + 2/5
y = x + 2/5


The slope of equation 1 is m_1 = 1  and intercept c = 2 / 5


Similarly
x + 2y = 4    - - - - - - - -(2)
Transform it into standard form
y = -x/2 + 4 /2
y = -x / 2 + 2


Slope of the equation 2  m_2= -1 / 2 and intercept c = 2
Slope of line 1 * slope of line 2 = 1 * -1/2 = -1/2


Since the lines are not perpendicular because the pair of lines does not satisfy the property of perpendicular lines i.e
m_1*m_2 = -1

Thus, the given pair of lines are not perpendicular.

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brainly.com/question/2696693

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6 0
1 year ago
Factor using the trinomial<br> 10.<br> X2 + 13x + 12
Rudik [331]

Answer:

Factoring the trinomial: x^2+13x+12 we get the factors \mathbf{(x+1)(x+12)}

Step-by-step explanation:

We need to factor the trinomial: x^2+13x+12

We can factor the trinomial by breaking the middle term i.e 13x

Such that adding or subtracting gets the both terms we get 13x and multiplying both terms we get 12x^2

We can break 13x as: 12x and x

Adding them we get 13x and multiplying them we get 12x^2

So,

x^2+13x+12\\=x^2+12x+x+12\\=x(x+12)+1(x+12)\\=(x+1)(x+12)

So, Factoring the trinomial: x^2+13x+12 we get the factors \mathbf{(x+1)(x+12)}

8 0
3 years ago
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OlgaM077 [116]

Answer: 1. 57

               2. 43

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             5.    16

Step-by-step explanation: am here to help

7 0
3 years ago
PJ is Decorating Pupcakes for Rocky´s Birthday Party. Her Color Scheme is Black, Purple, and Green. She Will use This Spinner to
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The answer to your question is C.
3 0
2 years ago
Read 2 more answers
Los jornales de dos obreros suman S/.60. Si uno de ellos gana S/.12
8_murik_8 [283]

Answer:

Cada uno de ellos gana:

S/. 24

S/. 36

Step-by-step explanation:

Planteamiento:

a + b = 60

a = 12 + b

Desarrollo:

sustituyendo el valor de la segunda ecuación del planteamiento en la primer ecuación del planteamiento:

(12+b) + b = 60

2b + 12 = 60

2b = 60 - 12

2b = 48

b = 48/2

b = 24

de la segunda ecuación del planteamiento:

a = 12 + b

a = 12 + 24

a = 36

Check:

24 + 36 = 60

5 0
4 years ago
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