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3 years ago

Please help ASAP Thank you

Mathematics

1 answer:

Degger [83]3 years ago

7 0

Answer:

comparison

Step-by-step explanation:

comparison

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at a conference of 250 people, 30% of the participants are french, 35% are americans, 20% are germans, and the rest are of the o

Lady bird [3.3K]

Ok...we got 250 people
30% are French, 35% are Americans, 20% are Germans....thats 85%.
This means 15% are from other countries

3 not from other countries...
0.85 * 0.85 * 0.85 = 0.6

0.6(250) = 150 students <===

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3 years ago

Tom saves $5 each month. at this rate, how many months will he need to save $20?

alexira [117]

5x = 20...where x = number of months
x = 20/5
x = 4...it would take Tom 4 months to save $20

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3 years ago

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OverLord2011 [107]

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$9 \times 9 \times 0.25 \times \pi \times 15 = 953.775 = 953.78$

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3 years ago

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2 1/3 plus 1 3/4 plz exlain and answer need to be in fraction form

NARA [144]

Answer:

7/12

Step-by-step explanation:

2 1/3 + 1 3/4

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2 years ago

What degree of rotation is represented on this matrix

Korvikt [17]

Answer:

Option B is correct

the degree of rotation is, $-90^{\circ}$

Step-by-step explanation:

A rotation matrix is a matrix that is used to perform a rotation in Euclidean space.

To find the degree of rotation using a standard rotation matrix i.e,

$R = \begin{bmatrix}\cos \theta & -\sin \theta \\ \sin \theta & \cos \theta \end{bmatrix}$

Given the matrix: $\begin{bmatrix}0 & 1 \\ -1 & 0\end{bmatrix}$

Now, equate the given matrix with standard matrix we have;

$\begin{bmatrix}\cos \theta & -\sin \theta \\ \sin \theta & \cos \theta \end{bmatrix}$ = $\begin{bmatrix}0 & 1 \\ -1 & 0\end{bmatrix}$

On comparing we get;

$\cos \theta = 0$ and $-\sin \theta =1$

As,we know:

$\cos \theta = \cos(-\theta)$

$\sin(-\theta) = -\sin \theta$

$\cos \theta = \cos(90^{\circ}) = \cos( -90^{\circ})$

we get;

$\theta = -90^{\circ}$

and

$\sin \theta =- \sin (90^{\circ}) = \sin ( -90^{\circ})$

we get;

$\theta = -90^{\circ}$

Therefore, the degree of rotation is, $-90^{\circ}$

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3 years ago