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adoni [48]
4 years ago
9

X – 3y = 13 2x + 4y = -4 What is the solution?

Mathematics
2 answers:
MAVERICK [17]4 years ago
7 0
X=4 Y=3 I hope this helped I don’t know if it is fully right
Allisa [31]4 years ago
5 0
In this question we can solve by using elimination method and eliminating few terms forming a linear equation in one variable
Let’s take the two equations and mark it as 1 and 2

X-3y=13—(1)
2x+4y=-4–(2)
Now let’s multiply 2 with first equation throughout
2x-6y=26–(3),
Subtracting (2) from (3)
We get,
-10y=30,
y=-3.
Substituting the value of y in (1),
x+9=13,
X=22
Thus x=22 and y=-3
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Simplify each expression as much as possible, and rationalize denominators when applicable. √18x/(3√x^5)=?
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Answer:

  (√2)/x²

Step-by-step explanation:

\dfrac{\sqrt{18x}}{3\sqrt{x^5}}=\sqrt{\dfrac{18x}{9x^5}}=\sqrt{\dfrac{2}{x^4}}=\dfrac{\sqrt{2}}{x^2}

_____

Or, maybe you mean ...

\dfrac{\sqrt{18}x}{3\sqrt{x^5}}=\sqrt{\dfrac{18x^2}{9x^5}}=\sqrt{\dfrac{2x}{x^4}}=\dfrac{\sqrt{2x}}{x^2}

8 0
3 years ago
Is that right? <br><br> If not please help me out.
Alex73 [517]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Write the following in interval notation:
elena-14-01-66 [18.8K]

Answer:

10/13 ≤ x < 18/13

Step-by-step explanation:

-1 ≤ 13x - 11 < 7

If a ≤ u < b then a ≤ u and u < b

⇒ -1 ≤ 13x - 11  and  13x - 11 < 7

-1 ≤ 13x - 11

Add 11 to both sides:  10 ≤ 13x

Divide both sides by 13:  10/13 ≤ x

13x - 11 < 7

Add 11 to both sides:  13x < 18

Divide both sides by 13:  x < 18/13

Combine the intervals

10/13 ≤ x < 18/13

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3 years ago
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Step-by-step explanation:

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3 years ago
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6 0
3 years ago
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