which algebraic rule describes the 270° counter-clockwise rotation about the origin?
a) (x, y) → (−x, y)
b) (x, y) → (x, −y)
c) (x, y) → (y, −x)
d) (x, y) → (−y, x)

Answers

Answer 1

270 degree counter clockwise is the same as 90 degrees clockwise.

If you imagine the (x,y) axes rotating 90 clockwise, you will see that what x becomes y, and what was y becomes negative x (after the rotation).

So x-->y, and y-->-x

So the answer (c) is the correct one.

Answer 2

Answer:

option C

Step-by-step explanation:

the correct answer is option C

when a point (x, y )  means point lies in the first quadrant is rotated counter-clockwise to 270° means now the point will be in the fourth quadrant.

hence, in algebraic notation we interchange x by negative x

and y remains the same and their value interchanges so,

the best-suited answer will be (x, y) → (y, -x)

hence, the answer will be option C


Related Questions

A store is having a sale where movies are 15 percent off their original price. A movie is on sale for $22.10. What was the original price of the movie?

Answers

the origncal price would be $26 I kinda did a guess and check but if you multiple 26 by 15% you get 3.9 and 26 minus 3.9 is 22.10

A cab service charges a flat rate of $3.25 and an additional $0.75 per mile. Ashley has $10. What is the maximum number of miles Ashley can travel?

Answers

After paying for the flat rate, she has 10-3.25=6.75 left.

With 6.75 she can go for 6.75/0.75 = 9 miles

Note: solving by reasoning is often faster than mechanically forming an equation.

Final answer:

To find the maximum number of miles Ashley can travel with $10, subtract the flat rate of $3.25 from $10, leaving $6.75, which is then divided by the per mile rate of $0.75 to result in 9 miles.

Explanation:

To calculate the maximum number of miles Ashley can travel with $10 using the cab service that charges a flat rate plus a per mile fee, you first subtract the flat rate from the total amount Ashley has. Then, divide the remaining amount by the per mile charge to find the number of miles she can afford.

Step-by-step Calculation

Subtract the flat rate ($3.25) from Ashley's total amount ($10): $10 - $3.25 = $6.75.

Blake looks at his checking account balance regularly. His three lowest balance during the year are as given. - $20 < -$12< - $ 3 select from the drop-down menus to correctly complete the statement The inequality statement shows that - $20 is a (lower or higher) which one is it Balance than -$12 and - $12 is a (Lower or higher) Which one is it balance than - $3

Answers

I believe the answers are lower and lower. -20 is lower than -12, and -12 is lower than -3

hey that is my name Blake -20 lower -12 high and -3 higher

What is another way to write 2.64 x 100

Answers

2.64•100
Or
Two and Sixty four times one hundred

Two point Sixty four times one hundred

264. Is another way once you multiply it.

The sum of two numbers is 21. One number is three less that the other. Find the numbers.

Answers

If you look at clue #2 first then you see that if you know one of the numbers then the other number is 3 less than it, so if I let one of the numbers be x then the other is

x - 3. Now clue # 1 says the sum of the two numbers is 21 so


x + (x - 3) = 21

12+9=21 because 12-3=9 and 9+12 is 21

A coyote weighs 11.3 lb convert the coyotes weight to ounces

Answers

1 lb = 16 ounces

11.3 lb x 16 oz = 180.8 ounces

11.3 lb equals 180.8 oz

Answer: 180.8 ounces

Step-by-step explanation: To convert 11.3 pounds to ounces, first find the conversion factor for pounds and ounces.

Conversion factor → 16 ounces = 1 pound

Next, notice that we are going from a larger unit "pounds" to a smaller unit "ounces." When we go from a larger unit to a smaller unit we multiply.

Larger ⇒ smaller multiply

In this case, we multiply 11.3 pounds by our conversion factor which is 16 ounces.

11.3 × 16 = 180.8 oz.

This means that 11.3 pounds is equal to 180.8 ounces.

Today only, a table is being sold at a 27% discount. The sale price is $438 . What was the price yesterday?

Answers

It is $600. Hope i helped

ANSWER FAST PLEASE Which is a reasonable first step that can be used to solve the equation 4x+3(x+2)=5(2x-3)

Answers

Hey there!!

Given equation :

... 4x +3(x+2) = 5(2x-3)

Using the distributive property :

... 4x + 3(x) + 3 (2) = 5(2x) + 5(-3)

... 4x + 3x + 6 = 10x - 15

Combining the like terms :

... 7x + 6 = 10x - 15

Subtracting 7x on both sides :

... 6 = 3x - 15

Adding 15 on both sides :

... 21 = 3x

Dividing by 3 on both sides :

... x = 7

This is the solved equation. The first step we have done to solve the equation was using the distributive property.

Hope my answer helps!

How to represent the number 8.2 using base 10 blocks. How much each size blocks is worth?

Answers

Final answer:

To represent 8.2 using base 10 blocks, you need 8 one blocks and 2 tenth blocks, where one blocks represent 1 and tenth blocks represent 0.1. This method is effective for visualizing numbers in base 10.

Explanation:

To represent the number 8.2 using base 10 blocks, we use different sizes of blocks to represent different place values in base 10.

Each size block is worth a different value based on its place in the number.

A hundred block represents 100.A ten rod represents 10.A one block represents 1.A tenth block (also known as a flat or a piece of flat) represents 0.1.

To represent 8.2, we would need:

8 one blocks (because 8 is in the ones place).2 tenth blocks (because 2 is in the tenths place, representing 0.2).

This method of representation helps in visualizing and understanding the value of numbers in the base 10 system. It's particularly useful in educational settings for explaining the concept of place values and decimals.

Factor the following expression.
10x^5 + 5x^3 - 14x^2 - 7

A. (5x^3 + 7) (2x^2 -1)
B. (5x^4 + 7) (2x -1)
C. (5x^4 - 7) (2x + 1)
D. (5x^3 - 7) (2x^2 + 1)

So, I took the test already a million times already and I keep failing because of questions similar to this. I'd appreciate if you also explained the process instead of just giving an answer. Thank you!

PS: (5x^4 - 7) (2x + 1) is not the answer.

Answers

10x^5 + 5x^3 - 14x^2 - 7

= 5x^3(2x^2 + 1) - 7(2x^2 + 1)

= (5x^3 - 7)(2x^2 + 1)

Answer is D

(5x^3 - 7)(2x^2 + 1)

Answer:

D.

Step-by-step explanation:

Let's use common factor gruping terms. We have that we have a common factor between the two left terms and another common factor between the two right terms. Then,

for the two left terms we take the common divisor, in this case 5 and the x with the minimun exponent, that is 5x^3.

for the two right terms we take the common divisor, in this case -7 and the x with the minimun exponent, in this case the -7 has no x so we don't include it in the common factor.

[tex]10x^5 + 5x^3 - 14x^2 - 7 = 5x^3(2x^2+1)-7(2x^2+1)[/tex]

Now, we use common factor again, this time the common factor will be [tex]2x^2+1[/tex]:

[tex]10x^5 + 5x^3 - 14x^2 - 7 = 5x^3(2x^2+1)-7(2x^2+1)= (2x^2+1)(5x^3-7)[/tex].

Then, the answer is D.

I don’t know how to do this question

Answers

let x represent the number of apples and y represent the number of oranges.

TOTAL: x + y = 112  

                  y = 112 - x

PEELED: [tex]\frac{3}{8}x = \frac{1}{2}y[/tex]

[tex](8)\frac{3}{8}x = (8)\frac{1}{2}y[/tex]

3x = 4y

3x = 4(112 - x)

3x = 448 - 4x

7x = 448

x = 64

y = 112 - x

  = 112 - 64

  = 48

a) There are 64 apples and 48 oranges

Peeled apples: [tex]\frac{3}{8}x = \frac{3}{8}(64)[/tex]= 3(8) = 24

Unpeeled apples: 64 - 24 = 40

Unpeeled - Peeled: 40 - 24 - 16

b) there are 16 more unpeeled apples than peeled apples

How to find X intercept and Y intercept from a slope intercept equation

Answers

To find the x intercept of a given linear equation, plug in 0 for y and solve for x. To find the y-intercept, plug 0 in for 'x and solve for 'y.
Final answer:

To find the X and Y intercepts from a slope intercept equation, first understand the equation structure (y = mx + b). The 'm' signifies the slope, and the 'b' indicates the y-intercept. To find the x-intercept, set y to zero and solve for x. To find the y-intercept, look at the 'b' value.

Explanation:

In a slope intercept equation written in the form y = mx + b, the x-intercept and y-intercept are determined by values of y and x when they equal zero respectively. The 'm' signifies the slope of the line, indicating the rise over run on the graph, and the 'b' indicates the y-intercept, which is the point at which the line intersects the y axis.

To find the y-intercept from a slope-intercept equation, you consider the 'b' in the equation. For instance, in the line graph, the y-intercept is 9, meaning the line crosses the y-axis at the point (0,9).

To find the x-intercept (the point where the line crosses the x-axis), you set y equal to zero and solve for x. If 'y' is equal to '0', then the equation becomes 0 = mx + b. Solving for 'x' in this equation will give the x-intercept.

Learn more about Slope Intercept Equation here:

https://brainly.com/question/17878329

#SPJ12

what does n/6 = 5.5 equal, what does n equal

Answers

Hello!

[tex]\frac{n}{6}=5.5[/tex]

First you had to multiply by 6 from both sides.

[tex]\frac{6n}{6}=5.5*6[/tex]

Then you simplify by the answer is correct.

[tex]n=33[/tex]

Hope this helps!

Thank you for posting your question at here on Brainly.

-Charlie

What is the measure of

Answers

what bro. thats not even a question
69 is the measure of -3384

8 more than 5 times a number is -27

Answers

8 + 5n = -27

5n = -35

n = -7

Solve for x over the complex numbers. x^2+8x+20=0

X= or X=

Answers

Steps:

[tex]x=\frac{-8+\sqrt{8^2-4\cdot \:1\cdot \:20}}{2\cdot \:1}: -4+2i[/tex]

[tex]x=\frac{-8-\sqrt{8^2-4\cdot \:1\cdot \:20}}{2\cdot \:1} -4-2i[/tex]

=\frac{-8-\sqrt{16}i}{2\cdot \:1}[tex]=-8-\sqrt{16}i[/tex]

[tex]=\frac{-8-\sqrt{16}i}{2}[/tex]

[tex]=\frac{-8-4i}{2}[/tex]

[tex]=-2\left(2+i\right)[/tex]

[tex]=-4-2i[/tex]

[tex]x=-4+2i,\:x=-4-2i[/tex]

Answer:you can use the quadratic formula but if you have to factor do the following:

x^2+8x+20=0

add -4 to both sides of the equation to complete the square

x^2+8x+20+(-4)=0+(-4)

x^2+8x+16=-4

(x+4)^2=-4

take the square root of both sides

x+4=+sqrt(-4)

x+4=+sqrt[(4)(-1)]

x+4=+2sqrt(-1) where sqrt(-1)=i, a complex number

x+4=+2i

x=-4+2i

x=-4+2i and x=-4-2i

you would get the same answer using the quadratic formula

Step-by-step explanation:

Solve for t. −22t>66 Enter your answer, as an inequality, in the box.

Answers

t<-3 should be the answer. I hope this helps


[tex] - 22t > 66[/tex]

divide both sides by -22
[tex]t < - 33[/tex]
the sign needs to be flipped due to dividing by a (-).

match the number with its opposite ONE NUMBER FOR EACH ONE. 3.2 A 2.3 -2.3 B -3.2. -1.5 C 1.5 5.1 D 5.1

Answers

3.2=-3.2

2.3=-2.3

1.5=-1.5

5.1=-5.1

Sam and Bruno were computing how many kilometers they rode in the 3 bike trips they took last month. In order, they rode 45.7, 40.9, and 38 miles. Their solutions are shown.

If one kilometer equals 0.621 miles, which is the best solution to find the total number of kilometers they rode? Why is it correct?
Bruno is correct. When going from a larger unit to a smaller unit you need to divide.
Bruno is correct. When going from a smaller unit to a larger unit you need to divide.
Sam is correct. When going from a larger unit to a smaller unit you need to multiply.
Sam is correct. When going from a smaller unit to a larger unit you need to multiply.

Answers

We are given number of miles the 3 bike trips they took last month = 45.7, 40.9, and 38 miles.

Sam and Bruno were computing how many kilometers.

Also one kilometer equals 0.621 miles.

From this we can see than 1 kilometer is smaller unit and a mile is a larger unit.

In order to convert number of miles into kilometers, we need to divide each number of mile by 0.621 miles.

We always divide a larger value by a smaller value to get the smaller unit.

Therefore,

Bruno is correct. When going from a larger unit to a smaller unit you need to divide.

Jay and Blair went fishing. Together they catch 27 fish. Jay catch 2 times as many fish as Blair. How many fish did Jay and Blair each catch. Write an equation and solve. Explain your work.

Answers

27=2J+B

you can guess and check: 27=2(9)+9

J=jay

B=blair

We can solve this using the equation 2x+x=27. The 2x represents Jay, and the x represents Blair. We can simplify the equation to 3x=27. 27/3=9. Blair caught 9 fish, and Jay caught 18 fish. I hope this helps!

63.90 three friends spent on dinner. They want to split the dinner check equally.

Answers

Hello  AskMeBosh

Since we know that there are 3 friends, and 63.90 dollars would be sent, we would divide by 3

63.90/3

= 21.3

Their check for each will be 21.3 dollars

:)

The split of the dinner each has to spend 21.30.

Concept:Here the fundamental concept to be use is of division.To split up bills equally, the total bill amount has to be divided by the no of people.

How to solve the given question?  The total bill amount = 63.90No of people to split the bill = 3∴ The amount to be spent by each person = [tex]\frac{Total \ Amount}{No \ of \ people} = \frac{63.90}{3} = 21.30[/tex]

Thus, each person has to pay 21.30.

Learn more about division here:

https://brainly.com/question/1622425

#SPJ2

Factor the expression 2x^3-10x^2-5x+25. Show your work.

Answers

Step 1. Factor out common terms in the first two terms, then in the last two terms.

2x^2(x - 5) -5(x - 5)

Step 2. Factor out the common term x - 5

(x - 5)(2x^2 - 5)

There arre a total of 82 students in robotics club and the science club the science club has 6 fewer students than the robotics club. How many students are in the science club?

Answers

Answer:

88

Step-by-step explanation:

You are just adding 82+6=88

There would be 35 students in the science club

Algebra problems. Can anyone help?

Answers

Answer:

Problem 1: The correct answer is B.

Problem 2: The correct answer is A.

Problem 3: The correct answer is B.

The ratio of the prices of Emma's phone to Sophie's phone is 7:8. If Sophie's phone costs $640, how much should the prices of their phones decrease in order to have a ratio of 9:11 ?

Answers

Let cost of Emma's phone = x

Given that cost of Sophie's phone = 640

Then ratio of their phones cost will be x:640 or x/640

Given that ratio of their phones cost is 7:8 or 7/8

So both ratios will be equal.

[tex]\frac{x}{640}=\frac{7}{8}[/tex]

[tex]x=\frac{7}{8}*640[/tex]

x=560


So the new ratio of the cost of their phones will be 560:640

Now we have to find about how much should the prices of their phones decrease in order to have a ratio of 9:11.

So let that decreased amount is k then we will get equation :

[tex]\frac{560-k}{640-k}=\frac{9}{11}[/tex]

11(560-k)=9(640-k)

6160-11k=5760-9k

6160-5760=11k-9k

400=2k

200=k


Hence final answer is prices of their phones should decrease by 200 in order to have a ratio of 9:11.

Answer:

For the ratio between the price of the phones to be 9:11, the price of Emma's phone must decrease from $ 560 to $ 523.66. That is, the price of Emma's phone should decrease $ 36,364

Step-by-step explanation:

To answer this question, call x on Emma's phone and z on Sophie's phone.

We know that the price relationship between x and z is 7: 8

This means that:

[tex]\frac{7}{8} =\frac{x}{z}[/tex]

We know that the price of Sophie's phone is $ 640

Entoces z = 640  

Now we clear x

[tex]\frac{7}{8} =\frac{x}{640}\\ x =640}\frac{7}{8}=560\\ x = 560[/tex]

Then, if the new relationship is 9:11 then:

[tex]\frac{9}{11} =\frac{x}{640}[/tex]

x = $523,636

For the ratio between the price of the phones to be 9:11, the price of Emma's phone must decrease from $ 560 to $ 523.66. That is, the price of Emma's phone should decrease $ 36,364

Can yall plz help!!!

Answers

Number one would be -8

What is 20k+11=8k+1 find k

Answers

k=-5/6 would be your answer

The answer you are looking for is K = -5/6.

To find this, you must get K by itself. First, subtract 8k from both sides to get 12k + 11 = 1. Next, subtract 11 from both sides to get 12k = -10. Finally, divide both sides by 12 to get K = -10/12, which simplified, is -5/6. Thus making -5/6 the answer.

I hope this helps!

78 boxes of dvd, each box has 116 in it. 19 boxes are shipped, how many are left

Answers

I believe 6,844 dvds in total and 59 boxes left

78 - 19 = 59

If you're looking for the number of boxes that are left, its 59, but if you are looking for how many DVDs are left then you would proceed to do:

116 · 59 = 6844

6844 would be the number of DVDs that are left in the remaining boxes.

Find the equation of the line that is perpendicular to y=3y-x=7 and contains the point (2,-1).

Answers

first you want to get it into standard form. which would mean you get the x of the side of the y and divide everything by the y's coefficient in this case 3.

3y-x=a

3y=x+a

y=1/3x+a

Now your going to want to turn this into a perpendicular li e which means you flip the coefficient and make it negitive

y=-3x+a

then we fill in the points.

-1=-3(2)+a

Solve

-1=-6+a

-1+6=a

5=a

Now put it in standard form.

y=-3x+5

The volume of a spherical tank is 790.272 pie cubic feet what is the

Answers

We are given the  volume of a spherical tank =  790.272 π cubic feet.

We need to find the diameter of the container .

We know formula for volume of a sphere.

[tex]V=\frac{3}{4}(r^{3}\pi)[/tex]

Where r is the radius.

Plugging V= 790.272 π  in the above formula, we get

[tex]790.272\pi =\frac{3}{4}(r^{3}\pi)[/tex]

Dividing both sides by π, we get

790.272 =[tex]\frac{4}{3}(r^{3})[/tex]

Multiplying both sides by 3, we get

2370.816 = [tex]4r^3[/tex]

Dividing both sides by 4, we get

592.704 = [tex]r^3[/tex]

Taking cube root on both sides, we get

r=8.4.

Diamater is 2 times of radius, that is 2 × 8.4 = 16.8

Therefore, the diameter of the container = 16.8 feet.

Other Questions
Which exponent makes this statement true? 1/5^9= 5^? Which of the following statement about dehydration is not true what is 735 divided 5 Being around positive people will tend to make you more positive. user: being around positive people will tend to make you more positive. true or false Given sample set A= {1,2,3,4,5} how many items are in the complement of set B if set B= all numbers greater than 2? (30 pts) Find the perimeter of a square if the length of one side is given. Are the perimeter of the square and the length of its side directly proportional quantities? Explain. 2 in Sam's track coach stands at the center of a circular track timing Sam's run. Which graph shows Sam's relative distance from the coach compared to time? How do you write 14/20 as a percentage Which of the following is an accurate description of the French Revolution? A. the beginning of Frances war with Spain over the Florida territory B. the republican uprising against the French monarchy and aristocratsC.the refusal of the United States to give in to Frances trade demands D. the decision of France to join the Native Americans resistance A stuntwoman is going to attempt a jump across a canyon that is 77 m wide. The ramp on the far side of the canyon is 25 m lower than the ramp from which she will leave. The takeoff ramp is built with a 15 angle from horizontal. If the stuntwoman leaves the ramp with a velocity of 28 m/s, will she make the jump? Why? What property is x+(3x+20)=180 Solve x -2/3(3x - 4) + 3x = 5/6 is x -19/6, 11/6, 21/6, 29/6 What is the measure of angle 1 a hyperbolic cooling tower is 100 meters wide at the base. the most narrow section of the tower is 100 m above the ground and 40 m wide. how wide is the cooling tower at its highest point, which is 160 m above the ground? The perimeter of a triangle is 40 inches +2nd side exceeds twice the first side by 1 inch the third side is 2 inches less than the second side find the length of each side of the triangle Which scenario is an example of extrinsic motivation? The doorbell rang, but Manny didn't answer; he felt too exhausted for visitors. When the temperature suddenly dropped, Lacey ran into a heated shop to warm up. After she cheated on the exam, Crystal's guilt finally drove her to confess to her teacher. Kenji's love of animals led him to volunteer at the wildlife rescue organization every weekend. Washington Elementary has 232 students Washington High has six times as many students how many students does Washington High have Kirsten will do yard work with Ryan during July. Kirsten mows the lawn every third day and Ryan waters the lawn every fourth day. They both trim the hedges every Saturday. Both begin their work on Monday July 1. After the first day,will Kirsten and Ryan work on the same day again? Explain. Will Kirsten and Ryan have to do two jobs on one day? Explain how you know. Identify the sentence in which the italicized pronoun is used correctly. She can direct the choir as well as *him*. It was *I* who answered the telephone. The principal objected to the families' accusing Bob and *he* behind their backs.*italicized* The base of a pyramid has n sides. Write and expression for the number of faces of the pyramid