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3 years ago

In what year did WW1 begin

Mathematics

2 answers:

creativ13 [48]3 years ago

7 0

Answer:

It started on: July 28, 1914

Step-by-step explanation:

It ended on – November 11, 1918

Fynjy0 [20]3 years ago

4 0

Answer:

28 July 1914 – 11 November 1918

please mark me brilliant

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What does the denominator of a rational exponent represent

Lunna [17]

So here's the rule from fractional exponents to radicals: $x^{\frac{m}{n}}=\sqrt[n]{x^m}$

<u>Looking at this rule, the denominator represents the root.</u>

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3 years ago

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Reika [66]

Answer:

You will have a 30-40% chance of rain, not snow. ( so 0% )

Step-by-step explanation:

I just looked at the weather report for Washington

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3 years ago

What is the value to 370

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Answer:

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Step-by-step explanation:

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3 years ago

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SashulF [63]

Answer:

Step-by-step explanation:

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3 years ago

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Solve the following system of linear equations: 3x1+6x2+6x3 = -9 -2x1–3x2-3x3 = 3 If the system has infinitely many solutions, y

choli [55]

Answer:

The set of solutions is $\{\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{c}12\\-7-r\\r\end{array}\right]: \text{r is a real number} \}$

Step-by-step explanation:

The augmented matrix of the system is $\left[\begin{array}{ccccc}3&6&6&-9\\-2&-3&-3&3\end{array}\right]$ .

We will use rows operations for find the echelon form of the matrix.

In row 2 we subtract $\frac{2}{3}$ from row 1. (R2- 2/3R1) and we obtain the matrix $\left[\begin{array}{cccc}3&6&6&-9\\0&1&1&-7\end{array}\right]$
We multiply the row 1 by $\frac{1}{3}$ .

Now we solve for the unknown variables:

$x_2+x_3=-7$ , $x_2=-7-x_3$
$x_1+2x_2+2x_3=-2$ , $x_1+2(-7-x_3)+2x_3=-2$ then $x_1=12$

The system has a free variable, the the system has infinite solutions and the set of solutions is $\{\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{c}12\\-7-r\\r\end{array}\right]: \text{r is a real number} \}$

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3 years ago