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levacccp [35]
3 years ago
8

Can you please help and explain I will give brainliest or thanks

Mathematics
2 answers:
Sonja [21]3 years ago
5 0
You put the whole number over 1 and multiply the numerators and the denominators

9. 12/1 or 12 (simplified)
11.7/2 or 3 1/7 (simplified)
13. 23/1 or 23 (simplified)
Evgesh-ka [11]3 years ago
3 0
9. answer is 12
10. answer is 3.5
11. answer is 23
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Subtract the equations.
Lostsunrise [7]

Answer:

0x+2y=22

Step-by-step explanation:

Set them equal to each other, (5x+4y=25)-(5x+2y=3). Distribute the negative into the right equation, (5x+4y=25)(-5x-2y=-3). Then combine like terms to get your answer.

6 0
3 years ago
I am so stupid but I hope someone can help with this one.
Snezhnost [94]
I'm sure your not that stupid just post a qeustion and I will help you.
6 0
3 years ago
Solve using gauss-Jordan elimination <br><br> X1 - 3x2 = -5<br> -3x1 - x2 = 5
steposvetlana [31]
\begin{cases}x_1&-3x_2=-5\\-3x_1&-x_2=5\end{cases}\\\begin{cases}3x_1&-9x_2=-15\\-3x_1&-x_2=5\end{cases}\\\begin{cases}&-10x_2=-10\\-3x_1&-x_2=5\end{cases}\\\begin{cases}&x_2=1\\-3x_1&-1=5\end{cases}\\\boxed{\begin{cases}x_2=1\\x_1=-2\end{cases}}
7 0
3 years ago
Determine if the given sides are a triangle or not <br><br> A. 21 cm, 7 cm, 6 cm
fgiga [73]

Answer:

This is not a triangle

Step-by-step explanation:

If you use the triangle inequality theorem you can reach your answer.

The theorem states that if you add the length of any 2 sides together, you will have a length greater than the length of the other side. Using this method we can easily see that 7+6=13 which is less than 21. Meaning this is not a triangle

4 0
3 years ago
How to write two different pairs of decimals whose sums are 14.1. One pair should involve regrouping
Nitella [24]
To solve, first let’s define regrouping:<span>
<span>=> Regrouping involves carrying and borrowing during subtraction and addition of the given numbers.

So let us have the non-regrouping decimal number: 
=> 8.4
Next, the other regrouping decimal 
=> 5.7

So now let us show how it becomes 14.1:
  8.4
+5.7
14.1

Starting from the right, 4 + 7 is equal 11, so bring down 1 and carry 1. Now 8+5 = 13, but 13 + carry 1 = 14
<span>Thus, the answer is 14.1</span></span></span>
3 0
3 years ago
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