Mathematics Middle School

1. Using the following dilated coordinates of a triangle choose the appropriate scale factor.
J:(2.4)---J':(4,8)
K:(1,1)----K':(2,2)
L:(4.0)----L':(8,0)

A.5
B.4
C.3
D.2

Answers

Answer 1

Answer:

2

Step-by-step explanation:

Answer 2

The scale factor is 2. So, the correct option is D.

Important information:

[tex]J(2,4)\to J'(4,8)[/tex][tex]K(1,1)\to K'(2,2)[/tex][tex]L(4,0)\to J'(8,0)[/tex]

We need to find the scale factor.

Scale factor:

If a figure is dilated by factor [tex]k[/tex] with origin as the center of dilation, then

[tex]P(x,y)\to P'(kx,ky)[/tex]

Using this rule, we get

[tex]J(2,4)\to J'(2k,4k)[/tex]

We have [tex]J'(4,8)[/tex]. So,

[tex]J'(2k,4k)=J'(4,8)[/tex]

On comparing both sides, we get [tex]2k=4[/tex] or [tex]4k=8[/tex]. In both cases, the value of scale factor is [tex]k=2[/tex].

Thus, the correct option is D.

Find out more about 'scale factor' here:

https://brainly.com/question/8765466

Related Questions

Which situation could be represented by the equation 32.4 = 8.1x?

A. An athlete swam 32.4 miles. It took the athlete 8.1 minutes to swim each mile. What is x, the total number of minutes the athlete swam?

B. An athlete swam 32.4 miles on Friday. The athlete swam 8.1 miles on Saturday. What is x, the total amount of miles the athlete swam on Friday and Saturday?

C. An athlete swam 32.4 miles. On Monday, the athlete swam 8.1 miles and the rest on Tuesday. What is x, the number of miles the athlete swam on Tuesday?

D. An athlete swam a total of 32.4 miles. The athlete swam 8.1 miles every day. What is x, the number of days the athlete swam?

Answers

Answer:

C or A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Hope I helped

Find the prime factorization of 196. Use a method of your choice. List your final answer
using exponents.

Answers

Positive Integer factors of 196 = 2, 4, 7, 28, 196 divided by 2, 2, 7, 7, gives no remainder. If we put all of it together we have the factors 2 x 2 x 7 x 7 = 196. It can also be written in exponential form as 22 x 72.

(I got all of this from google so i hope it’s right!)

Keywords should never be repeated in a résumé true or false?
srry its not in math tho

Answers

Keywords should never be repeated in a résumé true or false is a false statement, they should be repeating in a resume, they would often make the reader interested.

what is the estimation for 5.79 x 345?

Answers

Answer:

19975

Step-by-step explanation:

Answer:

2070

Step-by-step explanation:

so you round it to

6 x 345 = 2070

Help pls! I'll give correct answer Brainly

Answers

Answer:

Her cat lost -9/8 oz each week

Step-by-step explanation:

Answer:

[tex] - 1 \frac{1}{8} [/tex]

[tex] - 1 .125[/tex]

answer both in decimals and fractions

please a brainliest ^^

HELLPPPPP PLS INCLUDE EXPLANATION ON HOW TO DO IT SO I CAN DO IT ON MY OWN!!!!
NO TROLLS PLS EITHER!

Answers

Answer: 0.000021 in scientific notation is

2.1 × 10-5

Step-by-step explanation:

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.000021 into scientific notation, follow these steps:

Move the decimal 5 times to right in the number so that the resulting number, m = 2.1, is greater than or equal to 1 but less than 10

Since we moved the decimal to the right the exponent n is negative

n = -5

Write in the scientific notation form m × 10n

= 2.1 × 10-5

Therefore,

2.1 × 10-5 is the scientific notation form of 0.000021 number and 2.1e-5 is the scientific e-notation form for 0.000021

** Hope this helps you! Good Luck!

need helpp its a break room (click link) !!just need the direction code.

Answers

Answer:

bjugb k  

Step-by-step explanation:

Good job you will do great on this

Kelly ran 2 1/4 miles emma ran 1/2 the distance that kelly ran. how far did emma run

Answers

2 1/4 divided by 2
9/4 divided by 2
9/4 * 1/2 = 9/8
Emma ran 1 1/8 miles

Answer:

1 1/8 miles

Step-by-step explanation:

Jane is helping the librarian stack books on some new shelves. She is to stack 116 books on 16 shelves. The librarian told her to put the same number of books on each of the 16 shelves.

Describe one way that Jane can use to determine the number of books she should put on each shelf.

Answers

Answer:

She should divide The total of books to the total of shelfs

Step-by-step explanation:

Answer:

she can put 7 on each shelf with 4 left over.

Step-by-step explanation:

You divide 116 by 16, which is 7.25 and 1/4 of 16 is 4. So you know you have 4 leftover.

There are many properties of exponents. These properties are used to make problems with exponents simpler.
Choose one of the properties and explain why it is true. Then write a numerical expression and use the property you chose to simplify the expression.

Answers

Answer:

Power of a Quotient.

explanation: The Power of a Quotient Rule states that the power of a quotient is equal to the quotient obtained when the numerator and denominator are each raised to the indicated power separately, before the division is performed.

Which equation can be used to determine the percent of the diagram that one section represents?

1/10 equals 1/100 = 1%

1/10 equals 10/100 = 10%

1/100 equals 1/10 = 1%

1/100 equals 10/10 = 10%

Answers

Answer:it's b!! 1/10=1/100=1 percent

Step-by-step explanation:

You're welcome if this is correct please rate this good!

Which pair of ratios forms a proportion?

Answers

Answer:

6/7 and 48/56

Step-by-step explanation:

6x8=48

7x8=56

a, hope this helps :)

Unit Rate

1.) $2.50 for every 2 pounds

2.) 90 miles in 3 hours

Answers

Answer:

1) 1.25

2) 30 mph

Step-by-step explanation:

Which statement provides a set of arguments that supports the relationship
between the measures of <2 and <7?

A. Since <2 has the same measure as <8, and <8 has the same measure as
27, then <2 has the same measure as <7.

B. Since <2 has the
same measure as <6, and <6 has the same measure as
<7, then <2 has the same measure as <7.

C. Since <2 is supplementary to <6, and <6 has the same measure as <7,
then <2 is supplementary to <7.

D. Since <2 is supplementary to <8, and <8 is supplementary to <7, then
<2 is supplementary to <7.

< : This means angle instead of a less than sign.

Help Needed!!!!!!!!!

Answers

Answer:sdasda

Step-by-step explanation:

Three customers have accounts owing money. The table shows the account balances.
Which customer owes the least amount of money? (Side note I feel like if I choose Jordan I’m gonna get it wrong)

Answers

Answer:

R. Jordan does.

Answer: R. Jordan
Explanation: it is the greatest #, therefore the least owed

Plz help me with these 3 question for math class

Answers

Answer:

i need more info

Step-by-step explanation:

What exactly are you trying to figure out. There’s not that much explanation

step by step how to do 4 divided by 2/3.

Answers

Answer:

6

Step-by-step explanation:

4 ÷ 2/3

4 • 3/2

2 • 3

6

Answer:

you can't divide a fraction so you would put a one under the 4 and flip the 2/3 and multiple it's called flip and multiple my teacher taught me that it will help  

Step-by-step explanation:

brainliest?

during geography class students listed the number of the states they had visited.the responses were 12,9,17,7,5,4,2,1,8,5
what is the Mean for the data set?
A 3.2 states
B 2.8 states
C7 states
D not here

Answers

Answer:

7

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

I think not %100 sure but I hope this helps <3

am i right
if not please tell me which is yes and no.
ty!

Answers

Answer:

no, yes, and yes

Step-by-step explanation:

the equation is x>-1 3/4

Naomi buys an antique dresser for $1200. Each year, it appreciates (increases in value) by 3.5%. Write an equation to determine its value V(n) after n number of years

Answers

9514 1404 393

Answer:

  V(n) = 1200·1.035^n

Step-by-step explanation:

The value multiplies by 1+3.5% = 1.035 each year. After n years, that growth factor has been applied n times, so the value is ...

  V(n) = 1200·1.035^n

ASAP PLZZ HELP BRAINLEST TO THE BEST ANSWER IF YOU DONT KNOW DONT ANSWERRRRRRRRR

Answers

Answer:

soft sounds are better because the energy in the waves hitting your eardrum and if there is too much energy it could damage your ear.

Step-by-step explanation:

Answer:

dont delete the answer this time

Step-by-step explanation:

soft sounds are better because the energy in the waves hitting your eardrum and if there is too much energy it could damage your ear.

I need help!!!!!
Help Needed!!!!!!!!!!!

Answers

Is there any more information than just that picture? Please tell me

HELPPPP PLS LOOK AT THE PICTURE

Answers

3. No Hannah did not get the same answers for math and science. Because if you simplify 8/10 for math it’s 4/5. While for science you can’t simplify any father it’s simplified enough.
4. Same scores for social studies and math because again 8/10 divided by 2 for top and bottom is 4/5

34 and 1012

equivalent
not equivalent

Answers

The answer is equivalent
The answer is Equivalent

I will give Brainliest

Answers

Answer:

It's the first one

Step-by-step explanation:

Which of the following equations is equivalent to ab − 8 = 3b, when solving for b .
a = 11
b = 8/2a
b = -8/3 - a
b = -8/a - 3

Answers

It would be B=-8/a-3

The equivalent equation for the given equation is b=8/(a-3).

What is an equivalent equation?

Algebraic equations with equivalent solutions or roots are called equivalent equations. An analogous equation is one that is created by adding or removing the identical quantity or expression from both sides of a given equation. An equation is equivalent if both sides are multiplied or divided by the same non-zero value.

The given equation is ab-8=3b.

Now, transpose 3b to other sides of an equation, we get

ab-3b=8

b(a-3)=8

b=8/(a-3)

Therefore, the equivalent equation for the given equation is b=8/(a-3).

To learn more about the equivalent equation visit:

https://brainly.com/question/28263804.

#SPJ3

E = mc2
c = ?

A. E/m
B. m/E
C. √(E/m)
D. √(m/E)

Answers

Answer:

the answer you are looking for is letter C

I’m pretty sure the answer is C

The table represents a proportional relationship. Write an equation that represents the relationship. and i dont understand it at all
t2,h5 3t,7.5h 5t,12.5h 10t,h25

this is torture!!! i hate grids

Answers

Answer:

20t+50h

Step-by-step explanation:

you would add all the numbers with t on the end which gave you 20t then you add all the numbers with h which gives you 50h do you answer is 20t+50h.

Answer:

20t+50h

Step-by-step explanation:

you would add all the numbers with t on the end which gave you 20t then you add all the numbers with h which gives you 50h do you answer is 20t+50h.

Twenty percent of the 7th grade students like football. If there are 340 students in the 7th grade, how many like football??

Answers

Answer:

68 students.

Step-by-step explanation:

340 * 0.2

= 68

Hope this helped!

Question:

Twenty percent of 7th-grade students like football. If there are 340 students in the 7th grade, how many like football??

Answer:

68 students

Step-by-step explanation:

340 × 20% ≈ 68 students

Which sum does the model below represent?

4 positive tiles and 7 negative tiles.

Answers

Answer:

3 Negative Tiles; -3

Step-by-step explanation:

Let's say tiles = T

- If the equation relates to 4PT ± 7NT, then your answer is -3NT

Answer:

4 + (negative 7)

Step-by-step explanation:

I hope this helps

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