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kipiarov [429]
3 years ago
10

Solve the system by the elimination method.

Mathematics
1 answer:
katovenus [111]3 years ago
4 0

C. (-4,-⅔)

Step-by-step explanation:

Elimination Method:

R - 9S = 2

3R - 3S = -10

I'll solve for X first by eliminating S.

R - 9S = 2

-3(3R - 3S = -10)

R - 9S = 2

-9R + 9S = 30

(Add the equations)

-9R = 32

(Divide both sides by -9)

-9R/-5 = 32/-5

R = -4

Substitute the R value into either equation:

R - 9S = 2

(-4) - 9S = 2 (Add 4 to both sides of the equation)

+4 +4

-9S = 6 (Divide both sides of the equation by -9)

-9S/-9 = 6/-9

S = -6/9

Simplify

S = -2/3

Solution: (-4,-⅔)

Hope this helped

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5 0
3 years ago
What is the value of f?<br><br> 6f−12=−4f+6
Xelga [282]

First you had to add by twelve from both sides of equation form.

6f-12+12=-4f+6+12

Then simplify.

6f=-4f+18

Next, add by four-f from both sides of equation form.

6f+4f=-4f+18+4f

Simplify.

10f=18

Then you divide by ten from both sides of equation form.

\frac{10f}{10}= \frac{18}{10}

Finally simplify by equation.

f=\frac{9}{5}

Final answer: \boxed{f=9/5}

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

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3 0
3 years ago
In how many ways can a teacher arrange 6 students in the front row if there are 30 total students?
katrin2010 [14]
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8 0
3 years ago
Two group of scouts each have 120 members. If 1/3 of the first group and 1/4 of the second group elect to go on a field trip, ho
ValentinkaMS [17]
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7 0
3 years ago
Pls help i am on a timer
stich3 [128]

Answer:

x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Step-by-step explanation:

Given;

x² - 2x - 1 = 0

Solve by completing the square method;

⇒ take the constant to the right hand side of the equation.

x² - 2x = 1

⇒ take half of coefficient of x = ¹/₂ x -2 = -1

⇒ square half of coefficient of x and add it to the both sides of the equation

x^2 +  (-1)^2 = 1 + (-1)^2

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⇒ take the square root of both sides;

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Therefore, option B is the right solution.

3 0
3 years ago
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