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2 years ago

What's 9 + 10-4 + 78

Mathematics

2 answers:

stira [4]2 years ago

4 0

Answer:

9+10-4+78= 93

Step-by-step explanation:

According to pemdas, we would just add/subtract across. So we will complete these steps:

Step 1:

9+10-4+78

19-4+78

Step 2: 

19-4+78

15+78

Step 3:

15+78

In conclusion, the answer is 93.

Please help me out by marking this answer brainliest, and giving me a thanks!

Zarrin [17]2 years ago

3 0

Answer:

Step-by-step explanation:

78+9+(10-4)=

78+9+6=

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The matrix is not properly formatted.

However, I'm able to rearrange the question as:

$\left[\begin{array}{ccc}1&1&1|-1\\-2&3&5|3\\3&2&4|1\end{array}\right]$

Operations:

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Please note that the above may not reflect the original question. However, you should be able to implement my steps in your question.

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$\left[\begin{array}{ccc}1&1&1|-1\end{array}\right]$

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$\left[\begin{array}{ccc}2&2&2|-2\end{array}\right] + \left[\begin{array}{ccc}-2&3&5|3\end{array}\right]$

$\left[\begin{array}{ccc}0&5&7|1\end{array}\right]$

The second operation:

$-3R_1 +R_3 ->R_3$

This means that the new third row (R3) is derived by:

Multiplying the first row (R1) by -3; add this to the third row

The row 1 elements are:

$\left[\begin{array}{ccc}1&1&1|-1\end{array}\right]$

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Hence, the new matrix is:

$\left[\begin{array}{ccc}1&1&1|-1\\0&5&7|1\\0&-1&1|4\end{array}\right]$

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3 years ago

What's 9 + 10-4 + 78 ​

What's 9 + 10-4 + 78