Mathematics Middle School

Cho biết DABC ∽DMNP theo tỉ số 2/3 và chu vi của DABC là 12cm. Chu vi của DMNP là .Kết luận đúng là:


A.
4,5 cm

B.
7,5 cm

C.
8cm

D.
18cm

Answers

Answer 1

Answer:

C

Step-by-step explanation:

Answer 2
Answer question is C

Related Questions

This question is in Brazilian portuguese.

Considerando A= 2a - 2 e B = 3a - 3 determine:


A) A²+B²



B) A·B


C) (A+B)²

Answers

A) 4a+ ………………………. Plz thank me I need points lol
Here is the answer to A), I had to switch the “e” variable to a “b” variable so just change it back when you write the answer.

Please help me asap! I will give brainly!

Answers

Answer:

Divide the number of contestants by 4 and when there is 120 contestants there is 30 winners

Step-by-step explanation:

Looking back at past sequences we can see that when we had 8 contestants we had 2 winners 8/4=2 and we also saw 16/4=4 so that was the formula now we just had to do it on 120 contestants and now we get 30 winners....Hope this helps! :)

Answer:

Step-by-step explanation:

The ratio of contestants to winners is 4 : 1 so to find the number of winners you must divide by 4, so you must divide 120 by 4, which is 30.

Find the area of the figure in the image attached. Round to the nearest tenth if necessary.

Answers

Answer:

186 cm²

Step-by-step explanation:

*First we can move the shape around a bit to make it simpler to solve. If we take the triangle from the left side and move it over to the right, it connects with the other piece to create a rectangle. This leave two rectangles total which is much easier to solve.

*To find the length of the right rectangle, you take the 22 cm at the bottom and subtract the 12 cm (which is being used as the length for the left rectangle). This will give you a length of 10 cm long.

Left rectangle:

A = lh

A = 12 (8)

A = 96 cm²

Right rectangle:

A = lh

A = 10 (9)

A = 90 cm²

Total:

A = 90 + 96

A = 186 cm²

186cm 12 x 8 x 9 x 22

Choose a number line to model the following situation:

The temperature outside rose 15° and then dropped 15°. (4 points)

a
A vertical number line is shown with labels at 0 and 15. A red arrow (labeled dropped 15 degrees) begins at 15 and ends at 0. A purple arrow (labeled rose 15 degrees) begins at 0 and ends at 15.

b
A vertical number line is shown with labels at negative 15, 0, and 15. A red arrow (labeled dropped 15 degrees) begins at 0 and ends at negative 15. A purple arrow (labeled rose 15 degrees) begins at 0 and ends at 15.

c
A vertical number line is shown with labels at negative 15, 0, and 15. A red arrow (labeled dropped 15 degrees) begins at 15 and ends at 0. A purple arrow (labeled rose 15 degrees) begins at negative 15 and ends at 0.

d
A vertical number line is shown with labels at 0, negative 15, and negative 30. A red arrow (labeled dropped 15 degrees) begins at 0 and ends at negative 15. A purple arrow (labeled rose 15 degrees) begins at negative 15 and ends at negative 30.

Answers

Answer: A

Step-by-step explanation: It is showing that the temp Atari is raising by 15 ( +15) then dropping by 15 (-15)

Hope this Helps :))

Hxjs sis siss is ais sis sis sisw is

Hi! So, I need help. (Look at Screenshot below)

Answers

Answer:

(2 + 3/7) + 4/7

Step-by-step explanation:

(2 + 3/7) + 4/7

Regrouping

2 +(3/7+4/7)

2 +(7/7)

2+(1)

3

The answer is 3 because 3/7 + 4/7 makes 1 whole and 2 + 1 = 3

can someone answer this QUICKLY and make it make SENSE please

Answers

Answer:

3x6, (3)(6), 6+6+6

Step-by-step explanation:

The are asking which equation matches the situation,...

3 tables, 6 chairs per table = 3 x 6chairs = 18 chairs

3x6

(3)(6)

6+6+6

What they want you to do is put that equation 3x6 in the "Represent the Situation" box and the rest in the "Do not represent Situation" one

I need the same one

please help
a(8x + 2y) = 8ax +

Answers


a(8x + 2y) = 8x

Answer x=-2/0

Please check the image below for more info on the question

Answers

Answer:

The answer is A

Step-by-step explanation:

(I'm not 100% sure though, hope this helps.)

The answer is A and and t=5 please give me brainliest

12(43)

5 (88)

8 (63)

7 (28)

Please help me i tried to do this but I really don't get this can somebody help? plsssssssssssssssssssssssssssssss(sorry for spam)

Answers

I’m not entirely sure how to answer this without a word problem, but from what I see, all you have to do is multiply the two numbers.
12 x 43= 516
5 x 88 = 440
8x 63= 504
7 x 28= 196
Usually, when you see a number followed by another number in parentheses, like here, that means to multiply.
12(43)=516
5(88)=440
8(63)=504
7(28)=196

solve for P

P/15=20/25

Answers

Answer:

p=12

Step-by-step explanation:

Cross multiply in order to get answer

what are two different ways to solve 257+438

Answers

Answer:

Two ways to solve is to just do column addition or split 200+50+7 and add it to 400+30+8 first add 200+400 = 600, 50+30=80, 7+8 = 15. Add 600+80+15= 695.

Step-by-step explanation:

Answer:

695

Step-by-step explanation:

I need help with this ASAP! Will mark brainliest.

Answers

Answer:

58 and 11

Step-by-step explanation:

f-1(f(x))=x, so f-1(f(58))=58

f(f(5))=f(9)=11; (because f(5)=9)

The answer should be 58 and 11

Must click thanks and mark brainliest

Please help me I need this so I can get off my computer it's so late rn

Answers

Answer: 45 units

Step-by-step explanation:

Find the coordinates of R and S

R = -25

S = 20

Then just subtract them to find the distance between them.

20 - (-25) = 45.

Answer:

45

Step-by-step explanation:

First, find out the specific locations of R and S: for R, it is-25, and for S, it is 20 (use the tick marks on the x-axis).

Next, to find out the distance between R and S, be sure to add the absolute value, rather than the actual numbers.

So, ∣R∣ + ∣S∣ = 25 + 20 = 45

Hope this helps and let me know if you have any more questions!

HELP PLS HELP HELLLOPPPP

Answers

Option c is right choice
Hi! The answer is option C. because 4.6 - 6.4 = -1.8 -1.8 - 12 = -13.8 and the expression we are looking for a match to is -13.8 as well so you know we’ve found the answer. The expression we are looking for a matching answer to is -6.4 - 12 = -18.4 + 4.6 = -13.8
It can’t be option A. because it equals -23 and that doesn’t much to the expression we are looking for answer. Option B. can’t be correct either because it equals -1 and that isn’t right either and lastly option D. can’t be right because it equals -10.2. I hope I explained it good enough, Goodluck :)



Answer Key
Expression We Are Looking For A Match To = -13.8

Option 1 = -23
Option 2 = -1
Option 3 = -13.8
Option 4 = -10.2

SOLVE OR SIMPLIFY THIS!! -6-(2x+7)=-2(x+6)-1

Answers

[tex]\\ \sf\longmapsto -6-(2x+7)=-2(x+6)-1[/tex]

[tex]\\ \sf\longmapsto -6-2x-7=-2x-12-1[/tex]

[tex]\\ \sf\longmapsto -2x-13=-2x-13[/tex]

[tex]\\ \sf\longmapsto 2x-2x=0[/tex]

[tex]\\ \sf\longmapsto 0[/tex]

Answer:

Step-by-step explanation:

(2x + 7) = - 2(x + 6) - 1

2x + 7 = - 2x + 12 - 1

2x - 2x = 12 - 7 - 1

0x = 4

= 4

solve for W

14/W=26/39

Answers

Answer:

I think the answer is 21

Step-by-step explanation:

The answer is 21 because we can simple reduce 26/39 = 2/3. And now that you have done that all we need to do is find what 14/w = 2/3 this is quite simple as we just have to mutiply the 3*7 to get 21 as your answer. I don't know if this is correct or not but this is my best answer.

Answer:

21

Step-by-step explanation:

14 : w = 26 : 39

w = 14 * 39 : 26

w = 21

Please help I suck at math

Answers

Answer: 12

Step-by-step explanation:

Find the difference between the first and second points.

Since the x-coordinates are the ones changing, find the difference between them.

2 - (-3)

= 5

Then find the distance between the second and the third points.

Here, the y coordinates are the only ones changing, so we subtract them/or find the distance between them.

2-(-5)

=7

Now add the distances (5+7) and you get 12.

hope this helps!!:)

Dfbhjuyy grad by Saab

Absolute Value – how far or the
[ Select ] Answer | Counter | Number | or distance
a number is from zero.

Answers

Answer:

The last answer or Distance a number is from zero

Step-by-step explanation:

It's this answer because absolute value is just how far a number is from zero for example | -1 | is equal to 1 because -1 is 1 away from zero. Hope this helps :)

Answer:

The last answer or Distance a number is from zero i think i dont know

Step-by-step explanation:

This is a grid and I get confused on grids could u please help me with this question (44 points do not just answer please help me)

Answers

Answer:

g

Step-by-step explanation:

Answer:

I think its A

Please help me asap! I will give brainly!

Answers

Answer:

$26

Step-by-step explanation:

Answer:

26

Step-by-step explanation:

3 raffle tickets = $2 certificate

39 raffle tickets = ?

39 divide 3 = 13

13 * 2 = 26

39 raffle tickets = $26 certificate

Determine the rule for the number pattern and use it to find the missing values.

Which of the following statements are true about the pattern above?
Select all that are true.
3,7,15 , , , ,....
The 10th term in the pattern will be 30.
Each term in the pattern will be a multiple of 3.
Each term in the pattern will be prime.
Each term in the pattern will be odd.

Answers

9514 1404 393

Answer:

  Each term in the pattern will be odd.

Step-by-step explanation:

The first differences are ...

  7 -3 = 4

  15 -7 = 8

These differ by 4, and the second is double the first.

These relationships between the first differences give rise to two possible sequences: a) an exponential sequence; b) a quadratic sequence. We can use a graphing calculator to find the coefficients of each of the patterns.

Exponential Sequence

  a[n] = 2·2^n -1

  The sequence is 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047.

  The 10th term is 2047.

Quadratic Sequence

  a[n] = 2n^2 -2n +3

  The sequence is 3, 7, 15, 27, 43, 63, 87, 115, 147, 183.

  The 10th term is 183.

__

Based on the above, the only thing we can say about these sequences is that they are all odd numbers.

Clearly, the 10th term is not 30. 7 is not a multiple of 3, so that observation fails immediately. 15 is not prime, so that observation also fails immediately.

_____

Additional comment

The differences of first differences are called "second differences". The differences of those are "third differences". and so on. If you keep taking differences of a sequence described by a polynomial, the n-th differences being constant means the sequence is described by an n-th degree polynomial.

Here, if we assume the 2nd differences are constant at 4, then the sequence is described by a 2nd-degree polynomial. (Similarly, constant first-differences are described by a 1st-degree polynomial--a linear function.)

If sequential levels of differences are all exponential sequences, then the sequence itself is an exponential sequence. As here, it may have a vertical offset. The base of the exponential will be the common ratio of the differences. (Here, the first differences have a ratio of 8/4 = 2, so the sequence could be exponential with a base of 2.)

Each term in the pattern will be odd

I WILL GIVE BRAINLY AND 50 POINTS PLZZZZ HELP THANK YOU :D
What is the difference between -3 and -12?

-15
15
-9
9

Answers

Answer:

9

Step-by-step explanation:

difference means subtract

-3 - -12

Subtracting a negative is like adding

-3 + 12

9

Answer:

9

Step-by-step explanation:

Difference = -3 - (-12)

= -3 + 12

= 9

Harrison saved $48.97 from his first paycheck and $67.09 from his second paycheck. How much did he save from the paychecks?

Answers

Answer:

$116.06

Step-by-step explanation:

48.97 + 67.09 = 116.06

Answer:

$116,06

Step-by-step explanation:

48,97 + 67,09

PLEASE HELPP ! i can’t figure out slopes at alll

Answers

Answer:possible

Step-by-step explanation:

Answer is -15/24 you have to find the “rise over run which would be m and in the rise or this case the fall would be -15 and the run would be 24

Frederick used all his tiles to make a mosaic that was in the shape of a rhombus with a base of 10 inches and a height of 8 inches. Carrie has the same number of tiles as Frederick. She wants to use all of her tiles to make a mosaic in the shape of a parallelogram with a height of 5 inches. How long should she make the base of her mosaic?​

Answers

Answer:

16 in

Step-by-step explanation:

Both figures will have same area as same tiles used.

Area of rhombus:

A = ah = 10*8 = 80 in²

Area of parallelogram:

a*5 = 80a = 80/5a = 16 in
The answer to this question 16 inches
Hope this helps
- ANSWER GOD

Please help me with this.

Answers

Answer:

h(3)=20

Step-by-step explanation:

h(3)=h(3-2)*h(3-1)=h(1)*h(2)=-10*-2=20

Answer:

20

Step-by-step explanation:

h(1) = -10

h(2) = -2

h(n) = h(n-2) * h(n-1)

Let n=3

h(3) = h(3-2) * h(3-1)

      = h(1) * h(2)

       = -10 * -2

       = 20

DUDE I NEEED HELP FRIST ANSWER GET BRIANLY

Answers

Answer:

b and d

Step-by-step explanation:

Simplify each expression to lowest terms.


1. 2a - 4b +3ab -5a +2b


2. 4(2x+1) - 3x


3. 4(p - 5) +3(p +1)


4. 6(p +3q) - (7 +4q)


5. 4rs -2s - 3(rs +1) - 2s

Answers

1.) 2a - 4b + 3ab -5a + 2b

= 3ab -3a -2b

2.) 4(2x+1)-3x

= 8x+4 -3x

= 5x + 4

3.) 4(p-5) +3(p+1)

= 4p-20 + 3p+3

= 7p -17

4.) 6(p+3q) - (7 + 4q)

= 6p+18q -7 -4q

= 6p + 14q -7

5.) 4rs -2s -3(rs +1) -2s

= 4rs -4s -3rs -3

= rs -4s - 3

Must click thanks and mark brainliest

You already have it answered and I need points so commenting lol- respect the hustle

Add

4cosec 0+cosec 0+cosec 0+2cosec 0

step by step.

Answers

4cosec 0+cosec 0 + cosec 0 + 2 cosec 0

8 cosec 0

You have to add all the stuff to get a answer yes to school gossip

This is for my math class

Answers

Answer:

-25 feet

Step-by-step explanation:

We know that the change in altitude for the air balloon is -1500 feet, all within a span of 60 minutes, which then we are asked what is the rate of change.

To find the rate of change, we have to be able to divide a number by both sides that will not give us a decimal or very odd number. To avoid getting a decimal, divide both sides by 60.

-1500/60 = -25

60/60 = 1

So the rate of change would be -25 feet

It would be -25 feet because of how the altitude changes with her time
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