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podryga [215]
3 years ago
10

Write an equation and solve:

Mathematics
1 answer:
Maksim231197 [3]3 years ago
4 0
1. 47
2. 70.4 ft per min
3. 13.33333333333333
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PLS HELP ME!!! which matrix represents the system of equations below {8x-9y+13z=11
Finger [1]

Answer:

The answer is below

Step-by-step explanation:

The system of equations:

8x-9y+13z=11

-8x-5y+5z=15

3x+4y-8z=-10

The equations can be represented in matrix form as:

AX = B

X = A⁻¹B

Therefore:

\left[\begin{array}{ccc}8&-9&13\\-8&-5&5\\3&4&-8\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{c}11\\15\\-10\end{array}\right]\\\\\\\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}8&-9&13\\-8&-5&5\\3&4&-8\end{array}\right] ^{-1}\left[\begin{array}{c}11\\15\\-10\end{array}\right]\\

\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}\frac{1}{19} &-\frac{1}{19}&\frac{1}{19}\\-\frac{49}{380}&-\frac{103}{380}&-\frac{36}{95} \\-\frac{17}{380}&-\frac{69}{380}&-\frac{28}{95} \end{array}\right] \left[\begin{array}{c}11\\15\\-10\end{array}\right]\\\\\\\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{c}-0.74\\-1.69\\0.13\end{array}\right] \\

4 0
2 years ago
5x + 1 over 2y2
Oxana [17]

Step-by-step explanation:

So for this question just substitute the value and work out. I thought it it to the power of 2 as I can't tell from the question.

4 0
2 years ago
Estimate by rounding to the nearest integer.
BlackZzzverrR [31]
If you estimate it the equation is -10+12=9+12=21 or 2=21=21 so the answer is false<span />
8 0
3 years ago
How much is deducted from each of her paychecks for life insurance? Use the table.
alexira [117]

Post the part one of the problem please and thank you

8 0
3 years ago
Cydus<br> How many solutions doos the equation 4+4x - 3=4x +5 have?
ipn [44]
0 solutions because simplifying the equation gives us 1 = 5, which is never true
5 0
3 years ago
Read 2 more answers
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