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3 years ago

How to find the area?

Mathematics

1 answer:

Novay_Z [31]3 years ago

8 0

2*l*w+2*l*h+2*w*h plug in then solve

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7 less than a number is 20

sesenic [268]

Answer:

7 - x = 20 hope this helps!!

Step-by-step explanation:

can Iget brainliest?? ;P

4 0

2 years ago

Read 2 more answers

-14^2-8+3-6x^2+7x-11

denis-greek [22]

The answer is −6x2+7x−212

5 0

3 years ago

What is the value of Y????

yawa3891 [41]

Answer: The value of y=9.

6 0

2 years ago

A movie is 7 1 8hours long. After 45 minutes, how much of the movie is left?

kkurt [141]

Answer: 382.5 minutes

Step-by-step explanation:

7 1/8 = 7.125

7.125*60=427.5

Thus, the movie is 427.5 minutes long

427.5-45 = 382.5

Hope it helps <3

5 0

3 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, $-90^{\circ}$

7 0

2 years ago