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3 years ago

HELP I NEED ANSWERS FAST ITS E.L.A

Mathematics

2 answers:

Pavel [41]3 years ago

5 0

“huh” is the interjection!

Ivan3 years ago

5 0

Answer:

An interjection is an exclamation or sudden expression within a sentence that has no real connection to it. Common examples include ouch and well. Looking at a list of interjections for kids may further explain this simple definition. An interjection is almost any word in English that you can insert into a sentence to convey emotions.

2.these cookies that my mom baked are smell Delicious.

Step-by-step explanation:

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HELP PLS!!!!!!!!!! you get 5 pointsssssss PLS I BEG QUICK!!!!!

STALIN [3.7K]

Answer:

6.5 mph

Step-by-step explanation:

Pace per mile

09 : 13.85

min : sec

Speed

0.1083 miles per minute

6.5 miles per hour

7 0

3 years ago

Read 2 more answers

Determine if the columns of the matrix form a linearly independent set. Justify your answer. [Start 3 By 4 Matrix 1st Row 1st Co

Volgvan

Answer:

Linearly Dependent for not all scalars are null.

Step-by-step explanation:

Hi there!

1)When we have vectors like $v_{1},v_{2},v_{3}, ...$ we call them linearly dependent if we have scalars $a_{1},a_{2},a_{3},...$ as scalar coefficients of those vectors, and not all are null and their sum is equal to zero.

$a_{1}\vec{v_{1}}+a_{2}\vec{v_{2}}+a_{3}\vec{v_{3}}+...a_{m}\vec{v_{m}}=0$

When all scalar coefficients are equal to zero, we can call them linearly independent

2) Now let's examine the Matrix given:

$\begin{bmatrix}1 &-2 &2 &3 \\ -2 & 4 & -4 &3 \\ 0&1 &-1 & 4\end{bmatrix}$

So each column of this Matrix is a vector. So we can write them as:

$\vec{v_{1}}=\left \langle 1,-2,1 \right \rangle,\vec{v_{2}}=\left \langle -2,4,-1 \right \rangle,\vec{v_{3}}=\left \langle 2,-4,4 \right \rangle\vec{v_{4}}=\left \langle 3,3,4 \right \rangle$ Or

Now let's rewrite it as a system of equations:

$a_{1}\begin{bmatrix}1\\ -2\\ 0\end{bmatrix}+a_{2}\begin{bmatrix}-2\\ 4\\ 1\end{bmatrix}+a_{3}\begin{bmatrix}2\\ -4\\ -1\end{bmatrix}+a_{4}\begin{bmatrix}3\\ 3\\ 4\end{bmatrix}=\begin{bmatrix}0\\ 0\\ 0\end{bmatrix}$

2.1) Since we want to try whether they are linearly independent, or dependent we'll rewrite as a Linear system so that we can find their scalar coefficients, whether all or not all are null.

Using the Gaussian Elimination Method, augmenting the matrix, then proceeding the calculations, we can see that not all scalars are equal to zero. Then it is Linearly Dependent.

$\left ( \left.\begin{matrix}1 &-2 &2 &3 \\ -2 &4 &-4 &3 \\ 0 & 1 &-1 &4 \\ \end{matrix}\right|\begin{matrix}0\\ 0\\ 0\end{matrix} \right )R_{1}\times2 +R_{2}\rightarrow R_{2}\left ( \left.\begin{matrix}1 &-2 &2 &3 \\ 0 &0 &9 &0\\ 0 & 1 &-1 &4 \\ \end{matrix}\right|\begin{matrix}0\\ 0\\ 0\end{matrix} \right )\ R_{2}\Leftrightarrow R_{3}\left ( \left.\begin{matrix}1 &-2 &2 &3 \\ 0 &1 &-1 &4 \\ 0 &0 &9 &0 \\ \end{matrix}\right|\begin{matrix}0\\ 0\\ 0\end{matrix} \right )$ $\left\{\begin{matrix}1a_{1} &-2a_{2} &+2a_{3} &+3a_{4} &=0 \\ &1a_{2} &-1a_{3} &+4a_{4} &=0 \\ & & &9a_{4} &=0 \end{matrix}\right.\Rightarrow a_{1}=0, a_{2}=a_{3},a_{4}=0$

$S=\begin{bmatrix}0\\ a_{3}\\ a_{3}\\ 0\end{bmatrix}$

3 0

3 years ago

1. If the day is humid, and you took out a freexing spoon, and put it on a towel, what would happen?

yKpoI14uk [10]

Answer:

2. Water vapour and steam

4. The clouds in the sky are water vapour molecules because they evaporate ( turn from a liquid to a gas) from lakes and ponds.

5 0

3 years ago

PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!

GarryVolchara [31]

Answer:

- Colin's third number was 2

- April's sixth number was the same as Colin's first number.

- April's second number was 8.

Step-by-step explanation:

Colin:

First number = 0

Second number = 1

Third number = 2

Fourth number = 3

Fifth number = 4

Sixth number = 5

April:

First number = 10

Second number = 8

Third number = 6

Fourth number = 4

Fifth number = 2

Sixth number = 0

I hope this helps :)

4 0

3 years ago

A passenger train traveled 180 miles in the same amount of time it took a freight train to travel 120 miles. The rate of the fre

Mnenie [13.5K]

Answer:

The passenger train is moving at 45 miles per hour

Step-by-step explanation:

Let the amount of time it took the two trains to travel the distance = t.

Since the two trains traveled the distance at the same time,

Rate of the passenger train = $\frac{180}{t}$

Rate of the freight train = $\frac{120}{t}$

<em>Where t is in hours.</em>

From the problem, we can see that the rate of the freight train was 15 miles per hour slower than the rate of the passenger train. Mathematically, we can represent this as

$\frac{120}{t}= \frac{180}{t}-15$

from the above equation, we can now get our value for t as

$\frac{120-180}{t}=-15\\\frac{-60}{t}=-15\\t=4 hours$

We have our time of travel for the two trains as 4 hours.

The rate of the passenger train can now be calculated by 180/4 = 45 miles per hour

5 0

3 years ago