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sladkih [1.3K]
3 years ago
5

18x+6y=144 6x+10y=144

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
7 0

1. Copy Equations:

18x + 6y = 144

6x + 10y = 144

2. Multiply one of the equations in a way that gets either the x or the y to cancel each other out when added together:

18x + 6y= 144 --> 18x + 6y = 144

-3(6x + 10y= 144) --> -18x -30y = -432

3. Add equations together:

18x + 6y= 144

-18x -30y= -432 --> -24y = -288

4. Solve for y by dividing both sides of the equation by -24:

-24y÷-24 = -288÷-24 --> y= 12

5. Plug the y back into one of the original equations:

6x + 10(12)= 144

6. Solve for x:

6x + 10(12)= 144 --> 6x + 120= 144

6x + 120= 144

-120 -120 --> 6x = 24

6x÷6 = 24÷6 --> x= 4

7. Collect answers:

x= 4

y= 12

8. (Optional) plug answers back into one of the original equations the check answer.

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The root of a product is equal to the product of the roots of each factor. This will make the expression look like the following:
\sqrt[3]{ n^{3} } \sqrt[3]{ m^{2} n^{2}  }
Finally,, reduce the index of the radical and exponent with 3
n\sqrt[3]{ m^{2} n^{2}  }
This means that the correct answer to your question is n\sqrt[3]{ m^{2} n^{2} } .
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Please help me with this question
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7 0
3 years ago
<img src="https://tex.z-dn.net/?f=n%20-%205%20%5Cleqslant%205n%20-%201" id="TexFormula1" title="n - 5 \leqslant 5n - 1" alt="n -
ANTONII [103]
Hello there!

n - 5 ≤ 5n - 1

Solve for n

Let's start by subtracting 5n from both sides

n - 5 - 5n ≤ 5n - 5n - 1

n - 5 - 5n ≤ -1

We need to transfer -5 on the other side, we can do that by adding 5 on both sides

n - 5 - 5n + 5 ≤ -1 + 5

n - 5n ≤ -4

-4n ≤ -4

Finally divide both sides by -4

-4n/-4 ≤ -4/-4

n ≥ -1   (This is the answer)!

Do you know why I changed the sign?


 A lot of students failed to remember that rules, which is:
When you are solving an inequality, if you divide both sides by a negative sign, you MUST change the symbol as well. If it was this <, it will change to this >. Got it? Cool!



I hope the steps are clear to understand. If you have questions, feel free to let me know...

As always, I am here to help!
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3 years ago
Problem number 26 of the Rhind Papyrus says:
stira [4]

Answer:

X=12 on edg

Step-by-step explanation:

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