Every morning Jim runs for 15 minutes. If Jim runs 4 miles per​ hour, how far does Jim ​travel? Use the equation d=​rt, where d is​ distance, r is​ rate, and t is time.

Answer:

D

Step-by-step explanation:

hope it helps .

sorry about the pic , kinda hard to get the whole

The probability of answering the first question correctly is 0.2.

The first two questions correctly, 0.04

Incorrectly answer the first 3 correctly, 0.512

Incorrectly answer the first 4 correctly, 0.41

The probability of answering each question correctly is 1/5 = 0.2. The probability of answering incorrectly is 4/5 = 0.8.

Therefore, the probabilities for each scenario are:

Answer the first question correctly: 0.2

Answer the first 2 questions correctly: 0.2 x 0.2 = 0.04

Incorrectly answer the first 3 questions correctly: 0.8 x 0.8 x 0.8 = 0.512

Incorrectly answer the first 4 questions correctly: 0.8 x 0.8 x 0.8 x 0.8 = 0.41

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The complete question is:

imagine that you are taking a multiple-choice quiz written in Swedish and must guess randomly. each question has 5 choices and 1 correct answer. calculate the probability that you...answer the first question correctly. Correct answer the first 2 questions correctly. Incorrect answer the first 3 questions correctly. Incorrect answer the first 4 questions correctly.

Answer:

C) x/21

Step-by-step explanation:

Since Person 1 can complete the entire job (100% = 1/1 = 1) in 21 minutes, this person can complete 1/21 of the job per minute. This is Person 1's rate. If x is the amount of time it takes both people together to finish the job, then the amount of work Person 1 does would be (1/21)(x) = x/21.

The evil dragon can choose four maidens to eat in 182 different ways that do not include both Dorothy and Virginia.

There are 120 different ways that the evil dragon can choose four maidens out of the ten without including both Dorothy and Virginia.

To arrive at this answer, we first need to calculate the total number of ways that the dragon can choose any four maidens out of the ten. This can be done using the formula for combinations, which is:

nCr = n! / (r! * (n-r)!)

In this case, n = 10 (the total number of maidens) and r = 4 (the number of maidens the dragon wants to choose). So the total number of ways the dragon can choose four maidens out of ten is:

10C4 = 10! / (4! * (10-4)!) = 210

Next, we need to subtract the number of ways that include both Dorothy and Virginia. The dragon cannot choose both of these maidens, so we need to calculate the number of ways that it can choose the other two maidens. This can be done using the formula for combinations again, but this time with n = 8 (the number of maidens remaining after excluding Dorothy and Virginia) and r = 2 (the number of maidens the dragon still needs to choose).

8C2 = 8! / (2! * (8-2)!) = 28

Finally, we can subtract the number of ways that include both Dorothy and Virginia from the total number of ways to get the answer:

210 - 28 = 182

So the evil dragon has 182 ways to choose four maidens to eat that do not include both Dorothy and Virginia.



The evil dragon can choose four maidens out of ten in 210 different ways. However, it cannot choose both Dorothy and Virginia, so we need to subtract the number of ways that include them both. The dragon can choose two more maidens out of the remaining eight, which can be done in 28 different ways. By subtracting this from the total number of ways, we get that the dragon has 182 ways to choose four maidens to eat that do not include both Dorothy and Virginia.



In conclusion, the evil dragon can choose four maidens to eat in 182 different ways that do not include both Dorothy and Virginia. This calculation was done using the formula for combinations, which involves finding the total number of ways to choose the maidens and then subtracting the number of ways that include both Dorothy and Virginia.

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Answer:

yes

Step-by-step explanation:

3x+7x+2x = 12x

-5+10 = 5

so it's = 12x+5

The speed of the boat in still water is 8 miles per hour.

Let's call the speed of the boat in still water "x" (in miles per hour).

When Mackenzie rows downstream, the current is helping her, so the effective speed of the boat is (x + 4) miles per hour. The distance traveled is 96 miles. We can use the formula:

distance = rate × time

to set up an equation for the downstream trip:

96 = (x + 4) t

where "t" is the time (in hours) it takes for the downstream trip.

For the upstream trip, the current is working against Mackenzie, so the effective speed of the boat is (x - 4) miles per hour. The distance traveled is still 96 miles, but this time the trip takes 16 hours longer than the downstream trip. So we can set up another equation:

96 = (x - 4) (t + 16)

Now we have two equations with two unknowns (x and t). We can solve for t in the first equation and substitute into the second equation:

96 = (x - 4) (t + 16)

96 = (x - 4) (96/(x + 4) + 16)

Simplifying, we get:

96 = (x - 4) (96/(x + 4) + 16)

96 = 96(x - 4)/(x + 4) + 16(x - 4)

96(x + 4) = 96(x - 4) + 16(x + 4)(x - 4)

96x + 384 = 96x - 384 + 16(x^2 - 16)

96x + 384 = 96x - 384 + 16x^2 - 256

16x^2 = 256 + 384 + 384

16x^2 = 1024

x^2 = 64

x = 8

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The most individuals with a certain trait that follow a normal distribution would appear in the middle range.

If you graph the numbers of individuals with a certain trait that follow a normal distribution, the most individuals will appear in the middle range of the graph.

When graphing a normal distribution, it creates a bell-shaped curve.

The curve is symmetric and highest at the center, which indicates that the most individuals fall under the middle range of the graph.

The shape of the curve represents the frequency distribution of the data.

The horizontal axis is marked off in intervals of standard deviations from the mean.

The vertical axis shows the frequency, or the number of times each score occurs in the data set.

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Answer:

Hello! answer: b = 99

Step-by-step explanation:

To find b we just have to add 83 + 16 so

83 + 16 = 99 and 99 - 16 = 83 So B = 99

Answer:

B=99

Step-by-step explanation:

in our school school we were told that if a number is on the other side of the equals and it is - when you take it to the other side it will be addition so that is what I've just done hope you understand and if it was addition when we take it to the other side it would be subtraction.

Answer:

Never going to give you up.

Step-by-step explanation:

We're no strangers to love

You know the rules and so do I

A full commitment's what I'm thinking of

You wouldn't get this from any other guy

I just wanna tell you how I'm feeling

Gotta make you understand

Never gonna give you up

Never gonna let you down

Never gonna run around and desert you

Never gonna make you cry

Never gonna say goodbye

Never gonna tell a lie and hurt you

We've known each other for so long

Your heart's been aching but you're too shy to say it

Inside we both know what's been going on

We know the game and we're gonna play it

And if you ask me how I'm feeling

Don't tell me you're too blind to see

Never gonna give you up

Never gonna let you down

Never gonna run around and desert you

Never gonna make you cry

Never gonna say goodbye

Scenario 2 Magnifi Co. produces a high-end amplifier for musical aficionados. Historically, only 85% of the 200 amplifiers produced per month on average have met the company's demanding standards for quality control. Suppose a random sample of 50 amplifiers is taken from a month's production..

What is the probability that less than 40 of the amplifiers will meet the company's quality standards? b) What is the probability that between 40 and 45 inclusive of the amplifiers will meet the company's quality standards? c) What is the probability that more than 45 of the amplifiers will meet the company's quality standards? a) In order to solve for the probability that less than 40 amplifiers will meet the company's quality standards, we can use the binomial distribution formula: P(X < 40) = Σi=0^39 C(50, i) (0.85)i(1-0.85)50-i

This can be solved using a computer, calculator, or by using a binomial probability table. Using a binomial table, we can find that P(X < 40) = 0.024. Therefore, there is a 0.024 probability that less than 40 amplifiers will meet the company's quality standards. b) To solve for the probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards, we can use the binomial distribution formula again. We need to solve for P(40 ≤ X ≤ 45): P(40 ≤ X ≤ 45) = Σi=40^45 C(50, i) (0.85)i(1-0.85)50-i This can also be solved using a computer, calculator, or binomial table. Using a binomial table, we can find that P(40 ≤ X ≤ 45) = 0.435. Therefore, there is a 0.435 probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards. c) To solve for the probability that more than 45 amplifiers will meet the company's quality standards, we can use the binomial distribution formula one more time. We need to solve for P(X > 45): P(X > 45) = Σi=46^50 C(50, i) (0.85)i(1-0.85)50-i Once again, this can be solved using a computer, calculator, or binomial table. Using a binomial table, we can find that P(X > 45) = 0.056. Therefore, there is a 0.056 probability that more than 45 amplifiers will meet the company's quality standards.Overall, it can be concluded that the probability that less than 40 amplifiers will meet the company's quality standards is low, the probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards is relatively high, and the probability that more than 45 amplifiers will meet the company's quality standards is relatively low.

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(a) The distribution of X is binomial with parameters n = 20 and p = 600/3000 = 1/5 since we are randomly selecting 20 clients without replacement and interested in the proportion of happy consumers. Given below is the probability density function for this binomial distribution.

f(x) is equal to (n pick x) * p * x * (1-p) (n-x)

Where p and 1-p are the probability of success and failure, respectively, and n pick x is the binomial coefficient, which is equal to n!/(x! * (n-x)!).

(b) The formula for the anticipated value of X, or E[X], is

E[X] = np = 20 * (1/5) = 4

Var X, the variance of X, is defined as follows:

Var X = np(1-p) = 20*1/5*4/5=3.2

(c) The cumulative distribution function of the binomial distribution's formula can be used to get P[X >= 3]:

Sum(i=3 to n) f for P[X >= 3] (i)

Summarizing from I = 3 to 20 and substituting the values from the density function, we obtain:

Sum(i=3 to 20) = P[X >= 3] [(20 pick I (1/5)*i*4/5*(20-i)]

(d) We must determine the value of the cumulative distribution function at x = 3, which is equivalent to the likelihood of receiving three or fewer successes out of 20 trials, in order to approximate P[X >= 3] using the binomial table. By using n = 20 and p = 1/5 to calculate the value of the cumulative distribution function at x = 3 in the binomial table, it is possible to determine this probability. P[X >= 3]'s estimated value is 0.586.

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Answer:

Whats the problem?  it wont show for me...

Step-by-step explanation:

i will awnser, just gotta give me the problem

The margin of error, using a 95% confidence interval, for estimating the true population proportion for home delivery truck drivers is approximately 0.0897.

The margin of error is a measure of the uncertainty in the estimate of a population parameter based on a sample. In this case, we are estimating the true population proportion for home delivery truck drivers.

To calculate the margin of error using a 95% confidence interval, we need to know the sample size and the sample proportion.

Step 1: Determine the sample size. The larger the sample size, the smaller the margin of error.

Step 2: Calculate the sample proportion. This is the proportion of the sample that possesses the characteristic of interest (in this case, being a home delivery truck driver).

Step 3: Use the formula for margin of error:

Margin of Error = Z * sqrt((p * (1-p))/n)

where Z is the z-score associated with the desired confidence level (in this case, 95% confidence level), p is the sample proportion, and n is the sample size.

Step 4: Look up the appropriate z-score for a 95% confidence level. The z-score for a 95% confidence level is approximately 1.96.

Step 5: Plug in the values into the formula and calculate the margin of error.

For example, if the sample size is 100 and the sample proportion is 0.70, the margin of error would be:

Margin of Error = 1.96 * sqrt((0.70 * (1-0.70))/100)
= 1.96 * sqrt((0.70 * 0.30)/100)
= 1.96 * sqrt(0.21/100)
= 1.96 * sqrt(0.0021)
= 1.96 * 0.0458

= 0.0897 (rounded to 4 decimal places)

So, the margin of error, using a 95% confidence interval, for estimating the true population proportion for home delivery truck drivers is approximately 0.0897.

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The distribution of the property tax is done over 3 categories, namely Country, schools and others.

A percentage is a figure or ratio expressed as a fraction of 100 in mathematics. Although the abbreviations "pct.", "pct.", and occasionally "pc" are also used, the percent symbol, "%," is frequently used to indicate it. A percentage is a figure without dimensions and without a measurement system.

A tax is a mandatory fee or financial charge that a government imposes on a person or a business in order to raise money for public projects like building the finest infrastructure and facilities. Different public expenditure initiatives are then funded with the funds that have been raised. According to the established rule, it will invite serious repercussions if one does not pay taxes or refuses to contribute.

The collection of taxes can now take many different forms, including state taxes, federal taxes, direct taxes, secondary taxes, and much more.

In this form, we see that the distribution of property tax is done over 3 categories, Country, schools and others.

When we add the tax rate we get

tax amount= 2.35+0.5+1.2+1.55+2.14+32.50+3.20+9.95+2.4+1

                  = 56.79 Mills

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Answer:

66.42°

Step-by-step explanation:

Given

cos ? = \(\frac{2}{5}\) , then

? = \(cos^{-1}\) (\(\frac{2}{5}\) ) ≈ 66.42° ( to the nearest hundredth )

Answer:

i think a, b, and c not the last one

Step-by-step explanation:

i looked up the definition of a polynomial haha

hope this is right and helps <3

Answer:

About 33 years.

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Algebra I

Simple Interest Rate Formula: \(\displaystyle A = P(1 + r)^t\)

Logarithm Property 1: \(\displaystyle log(a^x) = xloga\)

Step-by-step explanation:

Step 1: Define

Identify

P = 5000

r = 5% = 0.05

A = 25000

t = unknown

Step 2: Solve for t

Based on the information, we can determine convergence or divergence of series.The given options do not provide a clear representation of potential outcomes.It is not possible to select correct option.

The given series is "nvž enn |||-) En=12 100 1-) Σπίο 3* 2"-1 ||-) En=2 n". In the series, we have the characters "nvž enn |||-)" which indicate the series notation. The characters "En=12 100 1-" suggest that there is a summation of terms starting from n = 12, with 100 as the first term and a common difference of 1. The characters "Σπίο 3* 2"-1 ||-) En=2 n" indicate another summation, starting from n = 2, with a pattern involving the operation of multiplying the previous term by 3 and subtracting 1.

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Answer:

x = - 3, x = 0.5

Step-by-step explanation:

Given

10x² + 5x - 15 = - 12 + 8x² ( subtract 8x² from both sides )

2x² + 5x - 15 = - 12 ( add 12 to both sides )

2x² + 5x - 3 = 0 ← in standard form

(x + 3)(2x - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

2x - 1 = 0 ⇒ 2x = 1 ⇒ x = 0.5

Answer:

x = -10

Step-by-step explanation:

verticle angles are congruent

80 + x = 70

Subtract 80 from both sides

x = -10

To describe y as the sum of two orthogonal vectors, x1 in the span{u} and x2 orthogonal to u , we follow two steps procedure:

1.First, find a vector x1 in the span{u} that is the projection of y onto u. To do this, use the formula:
  x1 = (y • u / ||u||^2) * u, where • represents the dot product and || || represents the magnitude of the vector.

2.Next, find the vector x2 that is orthogonal to u. Since y can be represented as the sum of x1 and x2, you can find x2 by subtracting x1 from y:
  x2 = y - x1

3.Now, you have y as the sum of two orthogonal vectors x1 and x2, with x1 in the span{u} and x2 orthogonal to u.

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The probability of rolling a yellow is 1/2, the probability of rolling a blue is 1/3, and rolling a yellow is more likely than rolling a blue.

a. To find the probability of rolling a yellow, we divide the number of favorable outcomes (rolling a yellow) by the total number of possible outcomes. In this case, there are 3 yellow sides out of 6 total sides on the die. Therefore, P(rolling a yellow) = 3/6 = 1/2.

b. Similarly, to find the probability of rolling a blue, we divide the number of favorable outcomes (rolling a blue) by the total number of possible outcomes. There are 2 blue sides out of 6 total sides on the die. So, P(rolling a blue) = 2/6 = 1/3.

c. To compare the probabilities and determine which outcome is more likely, we compare P(rolling a yellow) and P(rolling a blue). From the calculations above, P(rolling a yellow) = 1/2 and P(rolling a blue) = 1/3. Since 1/2 is greater than 1/3, rolling a yellow is more likely than rolling a blue.

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It is not necessarily true that either [a] = [0] or [b] = [0] when [a],[b] ∈ z6 and [a]·[b] = [0].

This is because in z6, there are other pairs of elements that multiply to [0] besides [0] and any other element. For example, [2]·[3] = [6] = [0] in z6, but neither [2] nor [3] are equal to [0].

However, if [a],[b] ∈ z7 and [a]·[b] = [0], then it is necessarily true that either [a] = [0] or [b] = [0]. This is because z7 is a field, meaning that it has no zero divisors (elements that multiply to [0] besides [0] itself). Therefore, the only way for [a]·[b] = [0] in z7 is if either [a] or [b] are equal to [0].

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Every quadratic nonresidue of p is a primitive root of p, when p = 2^k + 1 is primeIf p = 2^k + 1 is a prime number, we want to show that every quadratic nonresidue of p is a primitive root of p.

In other words, we aim to prove that if an element x is a quadratic nonresidue modulo p, then it is also a primitive root of p.

Let's assume p = 2^k + 1 is a prime number. To prove that every quadratic nonresidue of p is a primitive root of p, we can use the properties of quadratic residues and quadratic nonresidues.

A quadratic residue modulo p is an element y such that y^((p-1)/2) ≡ 1 (mod p), while a quadratic nonresidue is an element x such that x^((p-1)/2) ≡ -1 (mod p).

Now, let's consider an element x that is a quadratic nonresidue modulo p. We want to show that x is a primitive root of p.

Since x is a quadratic nonresidue, we know that x^((p-1)/2) ≡ -1 (mod p). By Euler's criterion, this implies that x^((p-1)/2) ≡ -1^((p-1)/2) ≡ -1^2 ≡ 1 (mod p).

Since x^((p-1)/2) ≡ 1 (mod p), we can conclude that the order of x modulo p is at least (p-1)/2. However, since p = 2^k + 1 is a prime, the order of x modulo p must be equal to (p-1)/2.

By definition, a primitive root of p has an order of (p-1). Since the order of x modulo p is (p-1)/2, it follows that x is a primitive root of p.

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Answer: 10.9 m

So to find the missing side we can use the pythagorean formula to do this. It must be a right angle triangle if we want to use the formula. So we know two of the side lengths and that, that it has a right angle. Let's do it real quick! The formula is:

c^2=a^2+b^2 (c, the missing side, a is any side, b is the other side length)

So in this one we will find the missing side which is c . . . Place the formula!

c^2 = 7.7^2 + 7.7^2

c^2 = 59.29 + 59.29

c = square root of 118.58

c = 10.89 --> round to nearest tenth is 10.9

Brainliest pwease if I could help you! <3

Answer:

nvm then someone already did the answer

Step-by-step explanation:

adios

Answer:

unit rate = 0.9 miles per hour

Step-by-step explanation:

Rate per hour of walking is calculate by = distance moved in miles/ time taken in miles

_________________________

given

distance = 3/5 of a mile = 3/5 miles

time = 40 minutes

we have to find time in hours

60 minutes = 1 hour

40 minutes = 1/60 *40 hours = 2/3 hours

thus

unit rate = (3/5 miles)/ (2/3 hours ) = (3*3)miles/(5*2) hour = 9/10 miles per hour

unit rate = 0.9 miles per hour

Answer:

A

Step-by-step explanation:

i think its a because its saying which one does not allow you to conclude that both triangles are congruent but the other ones are talking the sides and a is the only one thats talking about the angles. so i dont really know if its right but thats just an educated guess.