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Vika [28.1K]
3 years ago
10

Last question. If you are a moderator on Brainly, please help me. No links or absurd answers!

Mathematics
1 answer:
Nutka1998 [239]3 years ago
7 0

9514 1404 393

Answer:

  see below

Step-by-step explanation:

It is convenient to sort the data. This aids counting the number of data points in each bin, and in figuring how to define the bins.

Here, there are 20 data values that range from 15 to 64, a rangel of 49. The chart in the problem statement suggests that 5 bins is a suitable number, so bins of width 10 would cover the range.

The bin boundary should always be defined so that no data point falls on the boundary. Here, we can define bins of width 10 that have boundaries that satisfy ...

  x = 10n +14.5 . . . . n = 0 to 5

Then your chart is filled as follows:

  interval, values, #

  14.5–24.5, {15, 19, 20}, 3

  24.5–34.5, {27, 30, 32, 32, 33}, 5

  34.5–44.5, {38, 39, 40, 44}, 4

  44.5–54.5, {45, 45, 48, 53, 54}, 5

  54.5–64.5, {60, 62, 64}

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Calculate gcd(77, 30) by using the Euclidean algorithm. Find also integers u and v such that 49u + 30v = 1. Furthermore, find su
VladimirAG [237]

Answer:

1. gcd(77,30)=1

77=2*30+17\\30=1*17+13\\17=1*13+4\\13=3*4+1\\4=4*1+0

Since 1 is the last non zero remainder appearing in these equations then, 1 is the gcd of 77 and 30.

2. u=-11, v=18

Using the Euclidean Algorithm we have that

49=1*30+19\\30=1*19+11\\19=1*11+8\\11=1*8+3\\8=2*3+2\\3=1*2+1\\2=1*2+0

Now, we express the remainder as linear combinations of 49 and 30.

1&=3-2\\ &=3-(8-2*3)=3-8+2*3\\&=(11-8)-8+2(11-8)=3*11-4*8\\&=3*11-4(19-11)=7*11-4*19\\&=7(30-19)-4*19=7*30-11*19\\&=7*30-11(49-30)=\\&=18*30-11*49

Then 1=(-11)49+18*30

3. x=18

If 30x\equiv 1\text{mod 77} then

30x=k*77+1 for some k\in \mathbb{Z}.

Then, if k=7,

30x=7*77+1=540\\x=\frac{540}{30}=18

6 0
3 years ago
If 52 is 130% of a number, is the number greater or less than 52? explain.
Natasha2012 [34]
Let, the number = x
Then, x * 130% = 52
x * 1.30 = 52
x = 52/1.30
x = 40

So, the number is less than 52

Hope this helps!
3 0
3 years ago
The variable W represents the number of weeks the office has been on the new recycling plan and the variable P represents the to
chubhunter [2.5K]

Answer:

It will take \frac{45W}{P} weeks to recycle a total of 45 kg of paper

Step-by-step explanation:

W represents the number of weeks the office has been on the new recycling plan

P represents the total kilograms of paper recycled.

It took weeks to recycle P kilograms of paper = W

It took weeks to recycle 1 kilogram of paper =\frac{W}{P}

It took weeks to recycle 45 kilograms of paper =\frac{W}{P} \times 45

Hence It will take \frac{45W}{P} weeks to recycle a total of 45 kg of paper

5 0
3 years ago
A circle has a radius of 3. An arc in this circle has a central angle of 60. What is the length of the arc ?
Mashutka [201]
This is the formula:

Arc length = 2(3.14)(3)(60/360)

18.84(60/360)

18.84 x 0.16 = 3

The length of the arc = 3

4 0
3 years ago
What are two methods for proving the two triangles
Feliz [49]
Congruence method: AAA, ASA, SSS,SAS,HL(For right triangle).

For coordinates proof, if you are proficient with vector, then it will be easier to calculate the angles, otherwise, you should know the distance formula and calculate the length of the vertices.
5 0
3 years ago
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