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3 years ago

Evaluate each expression for the given values of the variables. SHOW ALL WORK

Mathematics

1 answer:

Arisa [49]3 years ago

8 0

substituting the value of x and y in the eqn,

3×-2 - ( 4×-2 + 6×3 )

-6 - (-8 + 18 )

-6 - 10

■ -16

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Can someone plz help me with numbers 8,10,12. Need for today

bearhunter [10]

#8: 14.95+7.55=22.50 so the cost of the DVD is $22.50 and the subtraction equation is, 22.50-7.55=14.95

#10: 2/3+1/3=1 so m=1

#12: 7/9+1/3=10/9 or 1 1/9

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3 years ago

What is the percent change from 68 miles to 42.5 miles

Arte-miy333 [17]

The answer -35.5 Hope this helps you

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3 years ago

Read 2 more answers

Meredith and her brother liam are saving to buy a basketball hoop that coats $75. Meredith earns $15 each week for babysitting a

Kay [80]

15x-6+10x-4 = 75

I think this is correct. I had a problem similar to this, and this was the kind of way it was set up

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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, $-90^{\circ}$

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3 years ago

Area of square tile, math question

Inessa05 [86]

Answer:

Answer: √49

___________

√49 = 7

Step-by-step explanation:

The area of a square is equal to the square of its side or the product of its side and its side.

A = s², because the sides of a square are congruent.

5 0

3 years ago