Will somebody help real fast I will give brain??​

Answer:

The matrixes are in the explanation box.

1. A mapping of (x,y,z) to (x,y,0)

2. Is a mapping of (x,y,z) to (-x,-y,z)

Step-by-step explanation:

We have the orthogonal projection onto the cy-plane to be a mapping of (x,y,z) to (x,y,0). Then we will have a transformation matrix that has the form below.

[1 0 0]

[0 1 0]

[0 0 1]

For the reflection in the z-axis,it is a reflection of (x,y,z) to (-x,-y,z). Our matrix will then have the form below

[-1 0 0]

[0 -1 0]

[0 0  1]

The matrix that projects into the XY plane is:

[tex]\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&0\end{array}\right][/tex]

The matrix that reflects in the z-axis is:

[tex]\left[\begin{array}{ccc}-1&0&0\\0&-1&0\\0&0&1\end{array}\right][/tex]

First, we want to find the transformation that goes from (x, y, z) to (x, y, 0).

Remember that:

[tex](x, y, z)*\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right] = (x, y, z)[/tex]

That matrix is the identity matrix.

Then, if we want to remove the z component, then we just need to make the last row-column equal to zero, we will get:

[tex](x, y, z)*\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&0\end{array}\right] = (x, y, 0)[/tex]

Now we want to make a reflection over the z-axis, this is a rotation of 180° around the z-axis, so it changes the sign of the x and y components:

(x, y, z) to (-x, -y, z)

From this, we conclude that the matrix will be:

[tex](x, y, z)*\left[\begin{array}{ccc}-1&0&0\\0&-1&0\\0&0&1\end{array}\right] = (-x, -y, z)[/tex]

If you want to learn more about matrices, you can read:

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Answer:

480 minutes

Step-by-step explanation:

60 minutes = 1 hr

60 x 8 = 480

480 minutes = 8 hrs

Answer:

When the positive number is greater than the negative number

Step-by-step explanation:

-6 + 7 =1 because -6 + 6 + 0 then you add 1.

Answer:

1. there are to negatives or two positives

2. there is one positive and one negative

Answer:

Yes, you are correct.

Step-by-step explanation:

Feel free to give brainliest.

Have an amazing day!

Answer:

Range: {-12, -8, 0, 8}

Step-by-step explanation:

To find the range of [tex] f(x) = -2x + 6 [/tex], plug in the value of each domain into the equation of the function to get the corresponding range value.

Given that the domain is {-1,3,7,9}, therefore:

✅[tex] f(-1) = -2(-1) + 6 = 2 + 6 [/tex]

[tex] f(-1) = 8 [/tex]

✅[tex] f(3) = -2(3) + 6 = -6 + 6 [/tex]

[tex] f(3) = 0 [/tex]

✅[tex] f(7) = -2(7) + 6 = -14 + 6 [/tex]

[tex] f(7) = -8 [/tex]

✅[tex] f(9) = -2(9) + 6 = -18 + 6 [/tex]

[tex] f(9) = -12 [/tex]

Range would be: {-12, -8, 0, 8}

Answer:

Number 7.

since it makes an L shape, and has a 90° angle

Answer:

Select (0, 9) and (8, 10)

Step-by-step explanation:

Answer:

y = 5, 3; x = 171, 155

Step-by-step explanation:

8y - 15 = y^2

y^2-8y+15=0

y^2-3y-5y+15=0

y(y-3)-5(y-3)=0

(y-5)(y-3)=0

y can be 5 or 3.

x = 180 - (8y - 15)

x = 180 - (8(3)-15)

x = 180 - 9

x = 171

OR

x = 180 - (8(5) - 15)

x = 180 - 25

x = 155

Answer:

A

Step-by-step explanation:

12x 5/2= 60/2= 30

3x5/2=15/2=7.5

7.5 by 30

Answer: 25

               2

Step-by-step explanation:

900 - 400 = 500 = 25

  50 - 10 =     40=    2        

Answer:

Its 58 centimeters

Step-by-step explanation:

The expected number of coupons that will be redeemed is 0.96.

Given data:

To find the expected number of coupons that will be redeemed, multiply the probability of redemption for a single coupon by the number of coupons distributed.

Given that 16% of $10-off coupons delivered by mail are redeemed, the probability of redemption for a single coupon is 0.16.

Since six customers are randomly selected and mailed coupons, the number of coupons distributed is 6.

Therefore, the expected number of coupons that will be redeemed is:

Expected number of redeemed coupons = Probability of redemption * Number of coupons distributed

= 0.16 * 6

= 0.96

Hence, the expected number of coupons is 0.96.

To learn more about probability, refer:

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Answer:

D

Step-by-step explanation:

BRAINLIEST PLS

Answer:

A = B + 15

Step-by-step explanation:

Let Diane sold B books in one hour,

Additional earning by selling 1 book = 1$

Additional earning by selling B books = Number of books sold × Additional earning by selling one book

= B × ($1.00)

= $B

Fixed earning of Diane in one hour of part time = $15

Total earnings = B + 15

A = B + 15

Table to find the input-output values for the graph,

A      15      16        17      18

B       0        1          2       3

Now we can plot the points on the graph.

Answer:

The only two values that have the same absolute value of 34, is +34 and -34.

Step-by-step explanation:

Answer:

5/4

Step-by-step explanation:

Answer:the answer is 25

Step-by-step explanation:

40 divided by 8 = (chords played per minute)

5 times (chords played per minute and you get your answer

Liz will play a total of 25 chords in 5 minutes today which is determined by the ratio.

The ratio is defined as a relationship between two quantities, it is expressed as one divided by the other.

We have been given that Liz played a total of 40 chords in 8 minutes.

Let's assume she plays a total of x chords in 5 minutes.

According to the given question, we can write the ratio as:

40 chords : 8 minutes =  x chords : 5 minutes

⇒ 40 / 8 = x / 5

Apply the cross-multiplication operation,

⇒ 8x = 40 × 5

Apply the multiplication operation,

⇒ 8x = 200

⇒ x = 200/8

Apply the division operation to get the answer

⇒ x = 25

Therefore, she will play a total of 25 chords in 5 minutes.

Learn more about the Ratio here:

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Answer:

1 whole number 3/10. Above is the answer

the answer would be 48 green marbles

Step-by-step explanation:

48/6=8

So, each person would get 8 marbles each

Answer:

UNLOCK

UNLOCK

A normal number

Answer:The answer is ONE

Step-by-step explanation:

Answer:

The answer is 15.

Step-by-step explanation:

x  =  3  − log  565/  log  2  =  −  6.142107057

Step-by-step explanation:

2^3-x =565

Log 2^3-x =  log  565

(3-x) times log 2 = log 565

3 −  x  =  log  565 / log  2

3  −  log  565 / log  2  =  x

x  =  3  − log  565/  log  2  =  −  6.142107057

Answer:

x = -557

Step-by-step explanation:

2^3 is 2x2x2 which equals 8. 8 - x = 565. Move the constant to the right-hand side and change its sign. -x = 565 - 8. This is 557. Now change the negative sign on the x to a positive and the positive sign on the 557 to a negative. x= -557.

Answer:

Yes

Step-by-step explanation:

Answer: 108 stitches sewn on 1 basket ball

Step-by-step explanation:

324 divided by 3 would give you 108

Answer:

324/3=16

Step-by-step explanation:

324 divided by 3= 16

Answer:

About 0.95

Step-by-step explanation:

Answer:

0.9514859136

Step-by-step explanation: I use calculator lol