1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vadim26 [7]
3 years ago
15

When you have two shapes to compare on a coordinate plane, you can determine the scale factor, knowing that the transformation w

as a dilation. Generate instructions you would give another student to determine the scale factor.
PLEASE HELP ME!!!
Mathematics
2 answers:
Sveta_85 [38]3 years ago
4 0

Answer:

Locate two corresponding ordered pairs of the two shapes. Calculate how much the pre-image values were multiplied by to obtain the image values. This is your scale factor. You can calculate this by dividing the coordinates of the mage by the corresponding coordinates of the pre-image.


const2013 [10]3 years ago
3 0
Assume that the initial coordinates are (x,y) and that the dilated coordinates are (x',y').

The dilation is therefore:
(x,y) ............> (x',y')

Now, let's assume that the dilation factor is k.
Therefore:
x' = kx
y' = ky

Based on the above, all the student has to do is get the initial coordinates and the final ones and then substitute in any of the above two equations to get the value of k.

Example:
Assume an original point at (2,4) is dilated to coordinates (4,8). Find the dilation factor.
Assume the dilation coefficient is k.
(x,y) are (2,4) and (x',y') are (4,8)
Therefore:
x' = kx .........> 4 = k*2 ..........> k = 2
or:
y' = ky ..........> 8 = k*4 .........> k = 2
Based on the above, the dilation coefficient would be 2.

Hope this helps :)
You might be interested in
4. Find the distance between the two points. Round to the nearest tenth if necessary.
Archy [21]

Answer:

Distance = 7.8 units

Step-by-step explanation:

In coordinate geometry, the distance between the 2 points is given by

Distance = \sqrt{(x1-x2)^{2} + (y1-y2)^{2} }

where (x1,y1) and (x2,y2) are coordinates of the 2 points.

Above the 2 points given are, (-2,-1) and (3,5).

<em>x1 = -2 , y1 = -1 , x2 = 3, y2 = 5</em>

<em>Distance = \sqrt{((-2)-(3))^{2} + ((-1)-(5))^{2} }</em>

<em>Distance = \sqrt{61}</em>

<em>Distance = 7.8102 units</em>

To the nearest tenth, Distance = 7.8 units

3 0
3 years ago
To get a B in​ math, Alexandria Pappas must average 80 on five tests. Scores on the first four tests were 82​,74​,82​,and 74.Wha
motikmotik

Answer:

88 score.

Step-by-step explanation:

Given:

To get a B in​ math, Alexandria Pappas must<u> average 80</u> on five tests.

Scores on the first four tests were <em>82​, 74​, 82​, and 74.</em>

Question asked:

What is the lowest score that she can get on the last test and still get a​ B?

Solution:

Let lowest score she can get on the last test = x

As we know:

Average=\frac{Sum\ of \ observations}{Number\ of\ observations}\\ \\ 80=\frac{82+74+82+74+x}{5} \\ \\

By cross multiplication:-

80\times5=312+x \\ \\400=312+x\\Subtracting\ both\ sides\ by\ 312\\400-312=312-312+x\\88=x

Thus, she can get 88 score on the last test to get a B in​ math.

5 0
3 years ago
25x^2+1=5 quadratic
Olenka [21]
25x² + 1 = 5

25x² + 1 - 5 = 0

25x²  - 4 = 0          By difference of two squares

(5x)² - (2)² = 0

(5x - 2)(5x + 2) = 0

5x - 2 = 0    or          5x + 2 = 0

5x = 0 + 2                5x = 0 - 2

5x = 2                      5x = -2 

x = 2/5                      x = -2/5

x = 0.4                      x = -0.4 
 

x = + 0.4  or -0.4
3 0
3 years ago
What is 80%times360%
zvonat [6]

Answer:2.88

Step-by-step explanation:Because 80% is 0.8 and 360% is 3.6 and when u multiply them u get 2.88

8 0
3 years ago
You offer to do the dishes for your family for the next month. You suggest that they can pay you in one of three ways.
Sophie [7]

Answer:

I say number 2

Step-by-step explanation:

0.02 is 2 cents while 0.20 is twenty sense. That would make more sense

5 0
3 years ago
Read 2 more answers
Other questions:
  • A nut mixture consists of almonds and cashews
    11·1 answer
  • What is the derivative of 5cos^2(pi)(t)?
    15·1 answer
  • A student ran the 100-m dash in 15.4 s. What was the student’s speed in miles per hour?
    7·2 answers
  • The perimeter of a rectangular field is 318 m. If the width of the field is 72 m, what is it’s length?
    8·1 answer
  • 1,383,098 in word form
    5·2 answers
  • What is the answer with this math
    11·2 answers
  • A city lot is 20 meters wide. It is 2 times as long as it is wide. How long is the city lot? Express your answer in simplest for
    15·1 answer
  • Farmer rusty nales has a total of 25 chickens and cows on his farm. How many of the aches animals does he have if all together t
    11·1 answer
  • A cone has height $h$ and a base with radius $r$ . You want to change the cone so its volume is doubled. What is the new height
    6·2 answers
  • Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!