3 years ago

Pls help me in this math question I hope I need help pls which one?

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

D)3*2+5*2=6+10=16

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Transfer transfer the system of equations by forming a matrix equation.

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Answer:

Step-by-step explanation:

$\begin{bmatrix}2 & -3\\ 1 & 2\end{bmatrix}^{-1}\times \begin{bmatrix}2 & -3\\ 1 & 2\end{bmatrix}\times \begin{bmatrix}x\\y \end{bmatrix}=\frac{1}{7} \begin{bmatrix}2 & 3 \\ -1 & 2\end{bmatrix}\times \begin{bmatrix}19\\ -1\end{bmatrix}$

Since, $\begin{bmatrix}2 & -3\\ 1 & 2\end{bmatrix}^{-1}=\frac{1}{7}\begin{bmatrix}2 & 3\\ -1 & 2\end{bmatrix}$

And $A^{-1}A=I$

$\begin{bmatrix}x\\y \end{bmatrix}=\frac{1}{7}\begin{bmatrix}2 & 3\\ -1 & 2\end{bmatrix}\times \begin{bmatrix}19\\-1 \end{bmatrix}$

$\begin{bmatrix}x\\y \end{bmatrix}=\frac{1}{7}\begin{bmatrix}35\\ -21\end{bmatrix}$

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Therefore, x = 5 and y = -3 will be the value of variables.

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3 years ago

Jonathan can jog 3 2/5 miles in 7/8 hours find his average speed in miles per hour

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D= 3 2/5=3.4m T= 7/8 = 0.875h Use v = d / t. V= 3.4/0.875 V=3.866 mph

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4 years ago

The product of c and 2 is greater than or equal to 20

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The product of c and 2 is greater than or equal to 20

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3 years ago

Kyle saved $500 from a summer job. HE spend 10% of his remaining savings each week. How much will Kyle have after 15 weeks?

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4 years ago

Read 2 more answers

Pls help me in this math question I hope I need help pls which one?​

Pls help me in this math question I hope I need help pls which one?