What is the probability that Karen's second card will be a black card?

Answer:

5/14

Step-by-step explanation:

let the aaded no be x

3/14 + x = 4/7

x = 4/7-(3/14)

x = 5/14

here added no is 5/14

In this case, Christopher divides the athletes into groups of varsity and junior varsity, which creates the strata. The type of sampling used in this scenario is stratified sampling.

Stratified sampling is a sampling method where the population is divided into homogeneous subgroups or strata, and individuals are randomly selected from each stratum in proportion to their representation in the population. In this case, Christopher divides the athletes into groups of varsity and junior varsity, which creates the strata.

By randomly selecting a proportionate number of individuals from each group, Christopher ensures that both varsity and junior varsity athletes are represented in the sample, maintaining the proportional representation of each group in the population. This method allows for more accurate and representative results by capturing the characteristics of both groups separately.


To learn more about stratified sampling click here: brainly.com/question/15604044

#SPJ11

Answer:

Step-by-step explanation:

Answer:

5x^3- 6x^2 - 25/y + 18 / y

Step-by-step explanation:

It would be that expression over y.

Sorry if its wrong I'm still learning too:)

Answer:

The answers are

*There are four terms.

*The term -25/y is a ratio.

Step-by-step explanation:

Answer:

its b

Step-by-step explanation:

Answer: the answer B sorry if its wrong

Step-by-step explanation: have a nice day buddy

Answer:

distance = 5 units

Step-by-step explanation:

In order to solve this problem we can start by plotting the two points you were provided with (see attached picture). This will help us visualize the problem better.

Now, we need to find the distance between those two points, so in order to do so we can use the distance formula:

\(distance = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}\)

in this case the x's and y's are given by the given points, since they are written as ordere pairs. And ordered pairs are written in the form (x,y). So for Point C:

C=(-1,4)

\(x_{1}=-1\)

\(y_{1}=4\)

and for point D

D=(2.0)

\(x_{2}=2\)

\(y_{2}=0\)

so we can now use those values in our distance formula so we get:

\(d=\sqrt{(2-(-1))^{2}+(0-4)^{2}}\)

\(d=\sqrt{(3)^{2}+(-4)^{2}}\)

\(d=\sqrt{9+16}\)

\(d=\sqrt{25}\)

d=5 units.

Answer:

Point C has the coordinates (–1, 4) and point D has the coordinates (2, 0). What is the distance between points C and D?

d = StartRoot (x 2 minus x 1) squared + (v 2 minus v 1) squared EndRoot

5  units

Step-by-step explanation:

Just did it on Edg

Answer:

17.2 cm

Step-by-step explanation: Each side would be 19 cm since a triangle has three sides. Next, we will use pythagorean theory. Since the equation would be a^2 + b^2 = c^2. Since 19^2 is 361 and is getting subtracted by 64 (we get it because at the bottom, we have to split it. also, 8 squared is 64). Then we get 297, which the base root with one number behind the decimal would be 17.2 cm.

The number of minutes a scented candle lasts if it burns out sooner than 80% of all scented candles is 244 minutes.

When the distribution is normal, we use the z-score formula.

In a set with mean µ and standard deviation σ , the z-score of a measure X is given by:

Z = (X – µ) / σ

The Z-score shows how many standard deviations the measure is from the mean. After finding the Z-score, need to look at the z-score table and discover the p-value associated with the z-score. This p-value is the probability that the value of the measure is smaller than X, means, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

So, in this case, given that:

µ = 249, σ = 20

The number of minutes a scented candle lasts if it burns out sooner than 80% of all scented candles:

100 – 80 = 20th percentile, which is X when Z has a p-value of 0.2. So, X when Z = –0.253.

Now, put all the values into the formula:

Z = (X – µ) / σ

–0.253 = (X – 249) / 20

X – 249 = –0.253 * 20

X = 244

Hence, the candle burns for 244 minutes.

Learn more about z-score at: https://brainly.com/question/15016913

#SPJ4

True, Monte Carlo simulation is used for statistical sampling where larger number of trials are used for the precise result.

Step by Step Explanation:

Therefore, it is true to have more number of trials in Monte Carlo simulation  statistical sampling for precise result.

Learn more about statistical sampling here

brainly.com/question/29490427

#SPJ4

Answer:

x = 128 degrees

Step-by-step explanation:

First figure out the angle inside the triangle

1st step: add 55 and 73 together:

⇒ 55 + 73 = 128

2nd step: subtract the sum from 180:

⇒ 180 - 128 = 52

to find x, take 180 again and then subtract 52 from it:

⇒ 180 - 52 = 128

Answer:

2.24$

Step-by-step explanation:

Answer: 1.3

Step-by-step explanation:

a) Diminishing returns start at x = 1,  where the marginal revenue will be less than the marginal cost

b)At x = 1, the company will earn R(1) = -32 + 6 + 18 + 4 = -4,000 dollars.

c) 0 ≤ x ≤ 25 implies that the Coffee Junction company has the capacity to spend a maximum of 25,000 dollars per month on advertisements.

a) At what level of advertising spending does diminishing returns start?

Diminishing returns refers to a situation when the marginal return on investment decreases as more resources are devoted to it. For instance, in case of Coffee Junction, increasing the advertising expenditure may lead to higher revenue, but the marginal revenue (revenue generated by each additional dollar spent) will gradually decrease.

b) How much revenue will the company earn at that level of advertising spending?

At x = 1, the company will earn R(1) = -32 + 6 + 18 + 4 = -4,000 dollars.

c) What does 0≤x≤25 tell us with respect to this problem?

In this problem, 0 ≤ x ≤ 25 implies that the Coffee Junction company has the capacity to spend a maximum of 25,000 dollars per month on advertisements.

To learn more about marginal cost refer:-

https://brainly.com/question/14923834

#SPJ11

The numbers are 82 and 48

An equation is a mathematical statement with an 'equal to' symbol between two expressions that have equal values.

Let x represent the first number and y represent the second number.

Equation 1, sum of the numbers:

x + y = 130

Equation 2, difference of the numbers:

x - y = 34

Using the elimination method system of equations to solve:

 x  +  y  =  130

 x  -   y  =  34

-------------------

Add the two equations to eliminate the y term leaving:

2x = 164

Divide both sides by 2:

x = 82

Find y from first equation: x  +  y  =  130

substituting 82 for x in the equation

82 + y = 130

Subtract 82 from both sides:

y = 48

The two numbers in the system of equation are 82 and 48.

Learn more about equation on: https://brainly.com/question/14107099

#SPJ1

Considering that the angles are opposite by the same vertex, the relationship between angles B and C is given by:

Vertical Angles.

Researching this problem on the internet, it is found that there is a vertex, and angles are diagonal, also called opposite by the same vertex. These angles are also called vertical angles, hence this is what describes the relationship between these angles.

More can be learned about angles that are opposite by the same vertex at  https://brainly.com/question/1673457

#SPJ1

The p-value can be found with the F-distribution table or statistical software. If the p-value is less than or equal to α, then answer is option (a),If the p-value is greater than α, then answer is option (b).

To determine the correct statistical decision based on the given F-statistic, F (3, 12) = 2.72, we need additional information such as the significance level (α) of the hypothesis test. The significance level is a predetermined threshold that is used to assess the statistical significance of the results.

The correct decision depends on whether the calculated p-value, which quantifies the strength of evidence against the null hypothesis, is less than or equal to the significance level (α).

To find the p-value, you would need the F-distribution table or statistical software.

Once you have the p-value, you can compare it to the significance level (α) to make a decision:

If the p-value is less than or equal to α, you would reject the null hypothesis, indicating a statistically significant mean difference.

If the p-value is greater than α, you would fail to reject the null hypothesis, suggesting that there is not a statistically significant mean difference.

Therefore, without the significance level or the p-value, it is not possible to determine the correct statistical decision.

Learn more about p-value here:

https://brainly.com/question/30461126

#SPJ11

The correct statement regarding which expression results in an irrational number is given as follows:

1) II, only.

Hence only II is the irrational number in this problem, as it has the non-exact square root of 2.

For item 3, we have that the square root of 5 multiplies by itself, hence it is squared and the end result is the rational whole number 5.

More can be learned about rational and irrational numbers at brainly.com/question/5186493

#SPJ1

Answer:

B. {x| x = –7, –6, 2, 11, 3}

Step-by-step explanation:

The domain of the relation is {x | x = –5, –3, 1, 2, 6}. Therefore, the correct option is A.

The given ordered pairs are (-6, 0), (2, 1), (-7, -4), (11, 2) and (3, 2).

We need to find what is the domain of the relation.

The domain of a function is the set of values that we are allowed to plug into our function. This set is the x values in a function such as f(x). The range of a function is the set of values that the function assumes. This set is the values that the function shoots out after we plug an x value in.

Consider the provided diagram.

Here the left side represents the input (x) values and the right side represents the output (y) values.

The domain refers to the set of possible input values.

Now consider the provided figure, the set of the input values is:

{x | x = –5, –3, 1, 2, 6}.

The domain of the relation is {x | x = –5, –3, 1, 2, 6}. Therefore, the correct option is A.

To learn more about the function visit:

https://brainly.com/question/21145944.

#SPJ6

Using the percentage concept, it is found that 20% of the people surveyed were satisfied with the car.

\(P = \frac{a}{b} \times 100\%\)

In this problem, 600 out of a total of 3000 people were satisfied with the car, hence:

\(P = \frac{600}{3000} \times 100\% = 0.2 \times 100\% = 20\%\)

20% of the people surveyed were satisfied with the car.

You can learn more about the percentage concept at https://brainly.com/question/10491646

Answer:

1.75

Step-by-step explanation:

1.75 :) you can check your answer by multiplying by 3!

Brainliest would be appreciated

Answer:

y=-3x-4

for the line that passes through the points

Answer:

1 2/3

Step-by-step explanation:

x-5x+5=2x-3x

-4x+5= -1x

5=3x

5/3=x

1 2/3=x

The number of units that tile will he need to surround his pool is 19.82units.

this question is of quadratic equation ,

The number of units of tile simply refers to the perimeter.

So, we need to find all the sides of the rectangle.

Now, we have,

AB = 4.24 units

BD = 7.07 units.

So, we can find AD using pythagoras theorem.

So,

(AD)² + 4.24² = 7.07²

(AD)² + 17.978 = 49.985

(AD)² = 49.985 - 17.978

AD = √32.007

AD = 5.66 units

AD = BC = 5.66 units

Likewise, AB = DC = 4.24 units

Thus,

perimeter = 2(5.66) + 2(4.24) = 19.8 units.

The number of units that tile will he need to surround his pool is 19.82units.

Learn more about quadratic equations here :-

https://brainly.com/question/30098550

#SPJ4

Answer:

Rs. 23520

Step-by-step explanation:

Given that :

At 12% profit ; sales price = 18,816

At (12 + 3)% profit ; sales price = x

Hence,

0.12 = 18,816

0.15 = x

Cross multiply ;

0.12x = 0.15 * 18816

0.12x = 2822.4

x = 2822.4 / 0.12

x = 23520

Hence, sales price for a 3% increaa in profit should be Rs. 23520

Answer:

The answer is x>17

Step-by-step explanation:

First subtract 4x from both sides

6x - 8 > 4x + 26

-4x. -4x

2x - 8 > 26

8 is negative so to get rid of it add 8 to -8 and 26

2x - 8 > 26

+8. +8

2x > 34

x needs to be by itself so divide both sides by 2

2x > 34

2. 2

x > 17

Answer:

To find the number, you can set up the following equation:

116% of x = 29

To solve for x, divide both sides of the equation by 116% (which is 1.16):

x = 29 / 1.16 ≈ 25

Therefore, 116% of 25 is approximately 29.

Step-by-step explanation:

Answer:

25

Step-by-step explanation:

to find the answer, use algebra! :)

1.16x = 29

x = 29 / 1.16

x = 25

easy!

(a) Consider only thermal expansion using the volume coefficient of thermal expansion.
(b) Consider the introduction of vacancies using the energy of vacancy formation and the change in number of vacancies.

When a metal is heated, its density decreases due to two sources: thermal expansion of the solid and the formation of vacancies.

(a) To determine the density of a gold specimen at 800°C considering only thermal expansion, we need to use the volume coefficient of thermal expansion. The volume coefficient of thermal expansion (β) for gold is given as 3 × 10^-5 K^-1. We can calculate the change in volume using the equation:

ΔV = V * β * ΔT

where ΔV is the change in volume, V is the initial volume, β is the volume coefficient of thermal expansion, and ΔT is the change in temperature.

Since density is inversely proportional to volume, we can use the equation:

ρ = m / V

where ρ is the density, m is the mass, and V is the volume.

(b) To repeat the calculation considering the introduction of vacancies, we need to use the energy of vacancy formation (E) given as 0.98 eV/atom. The change in energy (ΔE) due to the introduction of vacancies can be related to the change in number of vacancies (ΔNv) using the equation:

ΔE = ΔNv * E

Since vacancies contribute to a decrease in density, we can relate the change in number of vacancies to the change in density using the equation:

Δρ = -ΔNv * (m / V)

where Δρ is the change in density, ΔNv is the change in number of vacancies, m is the mass, and V is the volume.

It's important to note that the calculation of the change in density due to vacancies requires additional information, such as the number of atoms per unit volume and the change in number of vacancies.

Learn more about density from the given link:

https://brainly.com/question/1354972

#SPJ11

Answer: A and B are not independent events because P(A∣B) = 0.18 and P(A) = 0.4.

Step-by-step explanation:

They are not independent events because if they were P(A∣B) and P(A) would be equal.

Answer:

-3

Step-by-step explanation:

\(f(x)=-2x^3+x^2-2 \\\\f(1)=-2(1)^3+(1)^2-2= \\\\-2+1-2=\\\\-3\)

Hope this helps!