You own 24 CDs. You want to randomly arrange 7 of them in a CD rack. What is the probability that the rack ends up in alphabetical order

Answer:

y > 7

Step-by-step explanation:

2y > 20-6

2y > 14

2y/2 > 14/2

y > 7

Answer: y>y (graphing see below)

Step-by-step explanation:

2y+6>20

    2y>14

      y>7

Hope this helps!! :)

Please let me know if you have any question

Answer:

The correct answer is:

0.01$ (c)

Step-by-step explanation:

Standard deviation is a measure of how spread out numbers are from the mean value. The formula for standard deviation is given by:

[tex]s = \sqrt{\frac{\sum(x - \bar x)}{n} } \\where:\\x = sample\ \\\bar x\ = mean\\n\ = number\ of\ samples\[/tex]

Variance is a measure of the squared differences from the mean.

Variance is simply the square of the standard deviation. It is mathematically shown as:

[tex]s^2 = \frac{\sum(x - \bar x)}{n} }[/tex]

Now in our example,

Stabnard deviation = $0.10

Variance = (standard deviation)²

Variance = (0.10)²

Variance = $0.01

Answer:

c.) $0.01

Step-by-step explanation:

Got it right.

Answer:

[tex]z = 0.228[/tex]

Step-by-step explanation:

Given

x: -3 -1 0 1 1 2 4 4 5

n = 9

Required

Determine the z-score x = 2

z score is calculated by

[tex]z = \frac{x - Mean}{SD}[/tex]

First, we need to calculate the mean

[tex]Mean = \frac{\sum x}{n}[/tex]

Mean = \frac{-3- 1 + 0 + 1 + 1 + 2 + 4 + 4 +5}{n}

[tex]Mean = \frac{13}{9}[/tex]

[tex]Mean = 1.44[/tex]

Next is to calculate the standard deviation

[tex]SD = \frac{\sum (x_i - Mean)^2}{n}[/tex]

[tex]SD =\sqrt{ \frac{(-3-1.44)^2+(-1-1.44)^2+(0-1.44)^2+(1-1.44)^2+(1-1.44)^2+(2-1.44)^2+(4-1.44)^2+(4-1.44)^2+(5-1.44)^2}{9}[/tex][tex]SD =\sqrt{ \frac{(-4.44)^2+(-2.44)^2+(-1.44)^2+(-0.44)^2+(-0.44)^2+(0.56)^2+(2.56)^2+(2.56)^2+(3.56)^2}{9}[/tex]

[tex]SD =\sqrt{ \frac{19.7136+5.9536+2.0736+0.1936+0.1936+0.3136+6.5536+6.5536+12.6736}{9}[/tex]

[tex]SD =\sqrt{ \frac{54.2224}{9}[/tex]

[tex]SD =\sqrt{6.02471111111}[/tex]

[tex]SD = 2.455[/tex]

Substitute these values in

[tex]z = \frac{x - Mean}{SD}[/tex]

Where x = 2

[tex]z = \frac{2 - 1.44}{2.455}[/tex]

[tex]z = \frac{0.56}{2.455}[/tex]

[tex]z = 0.228[/tex]

Hence, the z score of x = 2 is o.228

Answer:

x = 12

Step-by-step explanation:

the other explanation might be confusing so here is the answer again to sum it up

Answer:

A

Step-by-step explanation:

So he bought 3 packages of pens.

And each package has 4 blue and 2 black.

Thus, the equation that can be used to find the total number of pens p is:

[tex]3\times(4+2)=p[/tex]

The (4+2) represents the total number of pens in 1 package. And the 3 represents the total number in 3 packages.

Further notes:

The total number of pens would be 18.

Answer:

3 times (4+2)=p

Step-by-step explanation

this is the answer because it gives us that key word and the key word is each and total and when you solve it the answer would be 18 because always use the parentheses  first then add 4+2 and that equals 6 and times 6 with the 3 and that gives 18

I hope this helps you have a wonderful day:)

Answer: 151.4, 0.1-131

Step-by-step explanation:

Answer:

-4

Step-by-step explanation:

The only difference between 4 and -4 is that 4 is positive and the other 4 is negative because of “-”.

Answer:

Step-by-step explanation:

The question is incomplete. Here is the complete question.

A circle has a radius of 19m . Find the radian measure of the central angle θ that intercepts an arc of length 5m.  Do not round any intermediate computations, and round your answer to the nearest tenth.

The formula for calculating the length of an arc [tex]L = \frac{\theta}{360} * 2 \pi r[/tex]

θ is the central angle

r is the radius of the circle = 19m

L is the length of an arc = 5m

Substitute the given values into the formula and get the central angle θ

5 = θ/360 * 2(22/7)*19

5 = θ/2π * 119.4285714

θ/2π = 5/119.4285714

θ/2π = 0.041866

θ = 2π*0.041866

θ = 0.083732π

θ = 0.1π rad (to the nearest tenth)

Hence the radian measure of the central angle that intercepts an arc of length to the nearest tenth is 0.1π rad

Answer:

t = 8 / n

Step-by-step explanation:

Time (t) and the number of workers (n), which are inversely proportional.

t = k (1/n)

t = k / n

Where,

t= time it will take workers to finish their job

n = number of workers doing the job

k = constant of proportionality

He estimates that it would take 2 days for 4 workers to wash the windows.

t= 2 days

n= 4 workers

t = k / n

2 = k / 4

Cross product

2*4 = k

8 = k

The relationship between time an number of workers is

t = k / n

t = 8 / n

Answer:

Step-by-step explanation:

t= 8/n

Answer:

£591.5

Step-by-step explanation:

First find the price increase by multiplying the new price by 30 percent . Then subtract the answer from the new price.

The original price of the TV prior to the increase is £650 and this can be determined by using the unitary method.

Given :

The price of a 46" LED flat TV screen has increased  to £845, which is 30% increase of the original price.

The following steps can be used in order to determine the original price of the TV prior to the increase:

Step 1 - The unitary method can be used in order to determine the original price of the TV prior to the increase.

Step 2 - According to the given data, the increased price of the TV is £845 which is 130%.

Step 3 - Now, let the original price of the TV be 'x'.

Step 4 - So, the value of 'x' is:

[tex]x = \dfrac{100}{130}\times 845[/tex]

Step 5 - Simplify the above expression.

[tex]x = \dfrac{8450}{13}[/tex]

[tex]x = 650[/tex]

So, the original price of the TV prior to the increase is £650.

For more information, refer to the link given below:

https://brainly.com/question/12116123

Answer:

2,000

Step-by-step explanation:

it is the opposite of what it really was

Answer:

8008 ways.

Step-by-step explanation:

That is  16! / 10! 6!

= 16*15*14*13*12*11 / 6*5*4*3*2*1

= 16*15*14*13*11 / 6*5*2

= 16*14*13*11 / 2*2

= 4*14*13*11

= 8008.

Answer:

6

Step-by-step explanation:

just put 6.00 bro it divides evenly

Answer:

125^-4

125=5²

125^-4=5^-12

Answer:

the answer is 126 because 9 times 14 is 126

Answer:

Step-by-step explanation:

Since it's a geometric sequence, to find the common ratio divide the previous term by the next term.

That's

And also

Also

Since the common ratio is the same for any of the terms chosen the common ratio of the sequence is

Hope this helps you

Answer:

B. -1/2

Step-by-step explanation:

The common ratio is the ratio between two numbers next to each other To find the common ratio, divide a term by the preceding term.

For example, if the term is 48, divide by -96.

48/-96 = -1/2

Another example, if the term is -24, divide by 48.

-24/48= -1/2

Let’s try one more example. If the term is 12, divide by -24

12/-24= -1/2

Therefore, the common ratio is 1/2 and the correct answer is B.

Answer:

1.5

Step-by-step explanation:

To find the midpoint, add the two coordinates and divide by 2

( -4+7)/2 =

3/2

1.5

The midpoint is 1.5

Answer:

1.5

Step-by-step explanation:

In this case the midpoint value is the average or mean of -4 and 7:

-4 + 7

--------- = 3/2 or 1.5

     2

Answer:

$200

Step-by-step explanation:

money he has now is 150% of what he had in the beginning

300 = 1.5x

x = 200

if he had $200 in the beginning, you add half of that to itself (200 + 100 = 300)

Answer:

0.1492

Step-by-step explanation:

Mean (m) = 9.5

Standard deviation (sd) = 3.4

Number of observations (n) = 50

Computing the test statistic :

X = 10

Z = (x - m) / standard error

Standard Error = sd/sqrt(n)

Z = (x - m) / (sd/sqrt(n))

Z = (10 - 9.5) / (3.4/sqrt(50))

Z = 0.5 / 0.4808326

Z = 1.0398 = 1.04

Using a P-value calculator, we can obtain the critical value with α = 0.10, hence, the critical value = 0.14917

= 0.1492

Answer:

l = 58.5

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Write out equation

112 = 2l - 5

Step 2: Isolate term l by adding 5 on both sides

117 = 2l

Step 3: Isolate l by dividing both sides by 2

117/2 = l

Step 4: Evaluate

l = 58.5

Answer:

[tex]\Large \boxed{l = \frac{117}{2}}[/tex]

Step-by-step explanation:

Let the length be [tex]l[/tex].

[tex]112 = 2 l - 5[/tex]

Adding 5 to both sides.

[tex]112 +5= 2 l - 5+5[/tex]

[tex]117 = 2 l[/tex]

Dividing both sides by 2.

[tex]\displaystyle \frac{117}{2} = \frac{2 l}{2}[/tex]

[tex]\displaystyle \frac{117}{2} = l[/tex]

Answer:

2/11

Step-by-step explanation:

We have to calculate this by

p(B nA)/p(A)

= We have A¹ to be that none of the die roll gives us 6

P(A¹) = 5/6²

P(A) = 1 -5/6²

= 11/36

BnA = one die being 6 and summation being equal to 8

= BnA = (6,2)(2,6)

= P(BnA) = 2/36

Therefore we have (2/36)/(11/36)

= 2/11

Answer:

See below

Step-by-step explanation:

1.  C = 2(3.14) for r

   r = C / 3.28

2.  A = 1/2 b h  for b

    b = A2 / h

3.  y = Mx + b for x

    y - b = Mx

    x = (y - b) / M

4.  A = 1/2 (a + b) h for  h

    A = (1/2a + 1/2b)h

    A = 1/2ah + 1/2bh

    A = (a + b) h / 2

    h = 2A / (a + b)

5.  V = (3.14) r² h  for h

   h = V / (3.14 r²)

Answer:

A. -4 and 4

B. No solution.

Step-by-step explanation:

The given equation is

[tex]\dfrac{3}{x+4}+\dfrac{2}{x-4}=\dfrac{16}{(x+4)(x-4)}[/tex]

A.

Equate the denominators equal to 0 to find the restrictions on the variable.

[tex]x+4=0\Rightarrow x=-4[/tex]

[tex]x-4=0\Rightarrow x=4[/tex]

Therefore, [tex]x\neq -4,4[/tex].

B.

We have,

[tex]\dfrac{3}{x+4}+\dfrac{2}{x-4}=\dfrac{16}{(x+4)(x-4)}[/tex]

[tex]\dfrac{3(x-4)+2(x+4)}{(x+4)(x-4)}=\dfrac{16}{(x+4)(x-4)}[/tex]

Multiply both sides by (x-4)(x+4).

[tex]3x-12+2x+8=16[/tex]

[tex]5x-4=16[/tex]

Add 4 on both sides.

[tex]5x=16+4[/tex]

[tex]5x=20[/tex]

Divide both sides by 5.

[tex]x=4[/tex]

Here the solution is x=4 but it is the restricted value.

Therefore, the given equation has no solution.

For the given rational equation, we have that:

The rational equation given in this problem is:

[tex]\frac{3}{x + 4} + \frac{2}{x - 4} = \frac{16}{(x + 4)(x - 4)}[/tex]

Then, applying the least common factor:

[tex]\frac{3(x - 4) + 2(x + 4)}{(x + 4)(x - 4)} = \frac{16}{(x + 4)(x - 4)}[/tex]

[tex]\frac{5x - 4}{(x + 4)(x - 4)} - \frac{16}{(x + 4)(x - 4)} = 0[/tex]

[tex]\frac{5x - 20}{(x + 4)(x - 4)} = 0[/tex]

Item a:

The denominator cannot be zero, hence:

[tex](x + 4)(x - 4) \neq 0[/tex]

[tex]x \neq -4[/tex]

[tex]x \neq 4[/tex]

The values of the variable that make(s) the denominators zero are x = -4 and x = 4.

Item b:

[tex]5x - 20 = 0[/tex]

[tex]5x = 20[/tex]

[tex]x = \frac{20}{5}[/tex]

[tex]x = 4[/tex]

However, x = 4 makes the denominator zero, hence the equation has no solution.

You can learn more about rational functions at https://brainly.com/question/13136492

Answer:

you need 17 parts copper and 3 parts tin in order to make brass

1. ratio of copper with respect to brass: 17:20

  ratio of tin with respect to brass: 3:20

  ratio of tin with respect to copper:   3:17

2. percentage of tin required in brass:  fraction of tin in brass X 100

  3/20 X 100 = 15%

3. if we used 150 kg tin in the alloy, then 150 kg is 15 % of the alloy

  (from last answer)

  150/x X 100 = 15%

  x = 1000 kg

if the total brass formed is 1000 kg, and 150 kg of it is tin,

copper used = 1000 - 150 = 850 kg copper

Answer:

$440,000

Step-by-step explanation:

Direct material:

= $195,000 - $30,000

= $165,000

Direct labor:

= $150,000 - $40,000

= $110,000

Manufacturing overhead:

150% of direct labor cost.

= $110,000 x 150 ÷ 100

= $16,500,000 ÷ 100

= $165,000

Total manufacturing costs:

= $165,000 + $110,000 + $165,000

= $275,000 + $165,000

= $440,000

The total manufacturing costs added during the period is: $440,000

Answer:

The answer is No

Step-by-step explanation:

7 to the fourth is 2401

4 to the seventh is 16384

Answer:

Price of roses is proportional to the number of roses.

Step-by-step explanation:

Let the price of roses are proportional to the number of roses.

Equation representing this phenomenon will be,

P = k(R) ⇒ k = [tex]\frac{P}{R}[/tex]

where 'P' = price of the roses

R = Number of roses

k = Proportionality constant

If we substitute the values of P and R and we get the same value of constant 'k', then the equation will be true.

For R = 3 and P = $9  

k = [tex]\frac{9}{3}[/tex]

k = 3

For R = 6 and R = 18

k = [tex]\frac{18}{6}[/tex]

k = 3

K is same in both the conditions, therefore, Price of roses are proportional to the number of roses.

Answer:

A dog needs 4/3 liters of water 2/5 of a day, Therefore

he'll need 4/3 liters for 5/2 day or

4/3 * 5/2 = 20/6 = 10/3 liters or 3 and 1/3 liters per day

Step-by-step explanation:

Answer:

[tex]y = - \frac{17}{7} x - 5 \frac{4}{7} [/tex]

Step-by-step explanation:

Please see attached picture for full solution.