Jodie ran at an average speed of 6 km/h for 40 minutes.
How far did she run in km?


help me please..​

Let us suppose that the farmer buys x cows, y pigs and z sheep. The total cost of cows, pigs, and sheep bought by the farmer is

10x + 3y + 0.5z.

The total number of cows, pigs, and sheep bought by the farmer is

x + y + z.

Given that the farmer spent exactly 100 and bought exactly 100 animals, we can write two equations as follows.

:\($10x + $3y + $0.5z = $100 ---(1)x + y + z = 100 ---(2).\)

Multiplying equation (2) by 10 on both sides, we get

:10x + 10y + 10z = 1000

Subtracting this equation from equation (1), we get

:7y + 9.5z = 500

The LHS of the equation

7y + 9.5z = 500

is an odd number. This means that either y or z has to be odd and the other even. If y is even, then z has to be odd and vice versa. However, both

3y and 0.5z

are integers.

The solutions are:

x =

52,

y = 8,

z = 40 ---(Option A)

or = 48,

y = 16,

z = 36

x = 44,

y = 24,

z = 32x

= 40,

y = 32

z = 28

The farmer buys 52 cows, 8 pigs, and 40 sheep.

Hence,

the answer is 52 cows, 8 pigs, and 40 sheep.

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No, the slope for X3 will decrease somewhat in the multiple regression model.

When a third variable, X3, is added to the multiple regression model that is uncorrelated with both height and weight, the inclusion of this variable can affect the relationship between the predictor variables and the outcome variable.

In the simple regression model, where only X3 predicts shoe size, the slope for X3 is 0.1. However, in the multiple regression model where height, weight, and X3 are predictors of shoe size, the inclusion of additional variables can introduce collinearity and affect the relationships between the variables.

The presence of collinearity can lead to changes in the coefficients (slopes) of the predictors. Specifically, the slope for X3 in the multiple regression model is likely to change from its original value of 0.1. It may decrease somewhat as the other predictors (height and weight) account for some of the variance explained by X3.

The extent to which the slope for X3 changes in the multiple regression model depends on the specific relationships and interactions between X3, height, and weight. These changes are determined by the statistical analysis and the data at hand.

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The weaker inequality 1/2 · 3/4 ··· 2n-1/2n < 1/√(3n) holds for all positive integers n, but using mathematical induction, the basis step works, although the inductive step fails.

a) If we try to prove the inequality 1/2 · 3/4 ··· 2n-1/2n < 1/√(3n) using mathematical induction, we can see that the basis step works. When n = 1, we have 1/2 < 1/√3, which is true.

Now, let's consider the inductive step. Assuming that the inequality holds for some positive integer k, we need to show that it also holds for k+1, i.e., we assume 1/2 · 3/4 ··· 2k-1/2k < 1/√(3k) and we want to prove 1/2 · 3/4 ··· 2k-1/2k · (2k+1)/(2k+2) < 1/√(3k+3).

If we attempt to manipulate the expression, we can simplify it to (2k+1)/(2k+2) < 1/√(3k+3). However, we cannot proceed further to prove this inequality, as it is not necessarily true. Therefore, the inductive step fails, and we cannot establish the original inequality using mathematical induction.

b) However, mathematical induction can still be used to prove the stronger inequality 1/2 · 3/4 ··· 2n-1/2n < 1/√(3n+1) for all integers greater than 1. We can start by verifying the case where n = 1, which gives us 1/2 < 1/√4, which is true.

Now, assuming the inequality holds for some integer k, we can multiply both sides of the inequality by (2k+3)/(2k+2) to get:

(1/2 · 3/4 ··· 2k-1/2k) · (2k+3)/(2k+2) < 1/√(3k+1) · (2k+3)/(2k+2).

Simplifying the expression on both sides, we have:

(2k+3)/(2k+2) < 1/√(3k+1) · (2k+3)/(2k+2).

We can observe that the right side of the inequality is less than 1/√(3k+3) by multiplying the denominator of the right side by (2k+3)/(2k+3). Hence, we obtain:

(2k+3)/(2k+2) < 1/√(3k+3).

This establishes the inequality for k+1, and thus, we have proven the stronger inequality using mathematical induction.

By verifying the case where n = 1 separately, we can conclude that the weaker inequality 1/2 · 3/4 ··· 2n-1/2n < 1/√(3n) holds for all positive integers n, as it follows from the proven stronger inequality using mathematical induction.

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The 90% confidence interval for Lucas Barrett's true average golf score on this course is (83.95, 106.05).  

We can construct a 90% confidence interval for Lucas Barrett's true average golf score on this course using a t-distribution.

Let X be the sample mean score, s be the sample standard deviation, and n be the sample size.

The formula for a 90% confidence interval for the population mean μ is:

(X - z*(s/√n), X + z*(s/√n))

here z is the critical value from a t-distribution with n-2 degrees of freedom and a confidence level of 0.90.

Using a t-distribution table, we find that the critical value for a confidence level of 0.90 and 99 degrees of freedom (n-2) is ±1.645.

Putting the given values, we get:

(95 - 1.645, 95 + 1.645) = (83.95, 106.05)

Therefore, the 90% confidence interval for Lucas Barrett's true average golf score on this course is (83.95, 106.05).  

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The zero input response y(t) can be written as: \(y(t) = -2/3e^{-3t} + 2/9te^{-3t} + 5/9 + 8/9e^{-3t}\)

Also ,  the zero input response y(t) is given as:\(y(t) = (8/9 - 2/3)e^{-3t} + 2/9te^{-3t} + 5/9\)

In the given question, we are given the transfer function of the system. The zero input response y(t) can be calculated using the following steps:

Step 1: Find the roots of the denominator of the transfer function. In the denominator, we have:s²+6s+9 = 0Using the quadratic formula, we get: s1 = s2 = -3Therefore, the denominator of the transfer function can be written as:

s²+6s+9 = (s+3)²

Step 2: Find the partial fraction of the transfer function. To find the partial fraction, we need to factorize the numerator of the transfer function.

G(s) = (3s+5):(s+3)²= A:(s+3) + B:(s+3)² + C Where A, B, and C are constants.

Multiplying both sides by (s+3)², we get:3s+5 = A(s+3)(s+3) + B(s+3)² + C On substituting s=-3 in the above equation, we get: C = 5/9On equating the coefficients of the terms with s and the constant term, we get:

A + 2B + 9C = 3A + 3B = 0On substituting C=5/9 in the above equation, we get: A = -2/3 and B = 2/9Therefore, the partial fraction of the transfer function can be written as: G(s) = -2/3:(s+3) + 2/9:(s+3)² + 5/9

Step 3: Find the inverse Laplace transform of the partial fraction of the transfer function. The inverse Laplace transform of the partial fraction of the transfer function can be calculated as: \(y(t) = -2/3e^{-3t} + 2/9te^{-3t} + 5/9\)

On substituting y(0) = 3 and y'(0) = −7, we get:3 = -2/3 + 5/9y'(0) = -2 + 10/9 = -8/9

Therefore, the zero input response y(t) can be written as: \(y(t) = -2/3e^{-3t} + 2/9te^{-3t} + 5/9 + 8/9e^{-3t}\)

Therefore, the zero input response y(t) is given as:\(y(t) = (8/9 - 2/3)e^{-3t} + 2/9te^{-3t} + 5/9\)

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The graph equations [18x - 3y = 21] and [y = 6x - 7] are plotted and both graphs coincide with each other.

So, we equations we have are:

18x - 3y = 21

y = 6x - 7

Now, plot the equations on the graph as follows:

(Refer to the graphs attached below)

Now, by looking at the graph, we can easily tell that the graph of both equations coincides with each other.

Therefore, the graph equations [18x - 3y = 21] and [y = 6x - 7] are plotted and both graphs coincide with each other.

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+ 12 - 4 + 3 - 15

= 12 + 3 - 4 - 15

=     15   -   19

= - 4

Answer:

He has -4 points. if I'm not mistaken

Step-by-step explanation:

12 - 4 + 3 - 15 = -4

I apologize if I am incorrect

Answer:

how tu understand what?

Answer:

To determine a cylinder's volume, you'll need to know its height and the radius of the circular base (the distance between the circle's center and its edge) at both the top and bottom. V = r 2 h is the formula, with V denoting volume, r denoting the radius of the circular base, h denoting height, and pi denoting the constant.

Step-by-step explanation:

Hope this helps! :)

Answer:

a line that is perpendicular to the line l

Answer:

he's at work for 9 hours 55minutes

Carlos works for 8 hours and 55 minutes.

Given that, Carlos starts work at 21:20 and finishes at 06:15 the next day.

A clock or a timepiece is a device used to measure and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month and the year.

The 24-hour clock is more often shown on digital clocks and is written in a 4-digit form, with the first two digits representing the hour and the last two representing the minutes.

From 21:20 to 06:15 there are 8 hours and 55 minutes.

Therefore, Carlos works for 8 hours and 55 minutes.

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Answer:

The radius of the scoop is r = 3.1 cm

Step-by-step explanation:

Since 3 gallons yields 90 scoops, and 1 gallon = 3785 cm³.

3 gallons = 3 × 3785 cm³ =  11355 cm³

So we have 11355 cm³ in 3 gallons which is also the volume of 90 scoops.

Since 90 scoops = 11355 cm³, then

1 scoop = 11355 cm³/90 = 126.2 cm³

Now, if each scoop is a sphere, the volume is given by V = 4πr³/3 where r is the radius of the scoop. Since we need to find the radius of the scoop, r, making r subject of the formula, we have

r = ∛(3V/4π)

Substituting V = 126.2 cm³, we have

r = ∛(3× 126.2 cm³/4π)

= ∛(378.6 cm³/12.57)

= ∛30.13 cm³

= 3.1 cm

So, the radius of the scoop is r = 3.1 cm

The excel statement to estimate the test average of these 4 grades is -

An average is the sum of many numbers divided by the total of numbers. It is also known as the arithmetic mean.

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P(exactly 20 out of 25 users) ≈ 0.00806

Generally, In mathematics and statistics, probability is a measure of the likelihood that an event will occur. It is expressed as a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain.

The probability of an event can be calculated by dividing the number of ways that event can occur by the total number of possible outcomes. For example, if a fair coin is flipped, the probability of it landing heads up is 1/2 because there is only one way for it to land heads up out of two possible outcomes (heads or tails).

Probabilities can be expressed in different forms, including fractions, decimals, and percentages. They can also be combined using mathematical operations such as addition, multiplication, and conditional probabilities to calculate more complex probabilities.

Probability theory has applications in many fields, including science, engineering, economics, and social sciences. It is used to make predictions, design experiments, and analyze data.

P(exactly 20 out of 25 users) = (25C20)(0.56^20)(0.44^5)

P(exactly 20 out of 25 users) ≈ 0.00806

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CQ

Excel assume that when adults with smartphones are randomly selected, 56% use them in meetings or in classes. if 25 adult smartphone users are randomly selected, find the probability that exactly 20 of them use their phones in meetings or in classes

The histogram of the 200 sample means would be an approximate display of the sampling distribution of means.

In this scenario, random samples of size 30 are taken from the population of duathlon participants. Each sample mean is calculated from the finishing times of the participants in that specific sample. The process is repeated 200 times, resulting in 200 sample means.

The sampling distribution of means refers to the distribution of these sample means. It shows the variation in the sample means that would be expected when repeatedly sampling from the same population.

The Central Limit Theorem states that under certain conditions (such as when the sample size is sufficiently large and the population distribution is not heavily skewed), the sampling distribution of means tends to follow a normal distribution, regardless of the shape of the population distribution. The mean and standard deviation of the sampling distribution of means can be calculated based on the population mean and standard deviation, as well as the sample size.

Therefore, the histogram of the 200 sample means would provide an approximation of the sampling distribution of means, which gives insights into the likely range and variability of the sample means that could be obtained from repeated sampling.

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To decide which measurement has a reverse relationship with the number of wins, we ought to seek for a relationship coefficient with negative esteem. A negative correlation coefficient shows that as one variable increments, the other variable tends to diminish.

Without seeing the real relationship framework, we cannot point out the precise statistic that has a reverse relationship with the number of wins. In any case, ready to search for the relationship coefficient that features negative esteem.

For illustration, in the event that we have a relationship network like this:

markdown

| W | Period | WHIP | SO/9 | BB/9 |

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

W | 1 | -0.7 | -0.6 | 0.5 | -0.3 |

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

Period | -0.7| 1 | 0.9 | -0.8 | 0.5 |

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

WHIP | -0.6| 0.9 | 1 | -0.7 | 0.4 |

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

SO/9 | 0.5| -0.8 | -0.7 | 1 | -0.4 |

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

BB/9 | -0.3| 0.5 | 0.4 | -0.4 | 1 |

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

We are able to see that the relationship coefficient between the number of wins (W) and the earned run normal (Time) is -0.7, which indicates a strong negative relationship. This implies that as the Time increments (showing poorer pitching execution), the number of wins tends to diminish. Subsequently, Time has a reverse relationship with the number of wins.

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Answer:

3_5/6 hours

Step-by-step explanation:

2_ 1/3 = 2_ 4/12

1_3/4 = 1_6/12

2_4/12 + 1_6/12 = 3_10/12

3_10/12 = 3_5/6

Answer with explanation:

Given: Charlie is laying down mulch in his front yard. It takes Charlie 4 minutes to lay down 11 cubic yards of mulch and  16 minutes to lay down 44 cubic yards of mulch.

Here, Time(Independent variable (x)) is directly proportion to the Volume of mulch(dependent variable (y)) lied by Charlie.

Let k be the constant of proportionality, such that

\(k=\dfrac{y}{x}\)

For x= 4 and k= 11, \(k=\dfrac{11}{4}\)

Required equation: \(y=\dfrac{11}{4}x\)                        

Two points are given in question: (4,11) , (16,44).

Take x= 8 , \(y=\dfrac{11}{4}(8)=22\)i.e. point (8,22)

Similarly, for x= 12, y=33 i.e. point (12, 33)

For x= 20 , y= 55 i.e. point (20,55)

Five data points: (4,11) , (16,44), (8,22),  (12, 33), (20,55).

Now, we plot these points on graph and join them

Answer:

Here

Step-by-step explanation:

Answer:

IT IS 12

Step-by-step explanation:

Answer: yes(800/5=160)

Step-by-step explanation:

Answer:

Yes. Any number (besides 0) that ends in 0 is dividable by 5 as well as 10.

Answer:

1,45 cubic units

Step-by-step explanation:

The method of cylindrical shells demands that the volume of the solid is given by:

\(V=2\pi\int_a^b xf(x)dx\)       (1)

In this case you have that f(x) is:

\(f(x)=cos(\frac{\pi}{2}x)\)

a = 0

b = 1

First, you solve the integral, by parts:

\(\int xf(x)dx=\int xcos(\frac{\pi}{2}x)dx=x(\frac{2}{\pi})sin(\frac{\pi}{2}x)-\int (\frac{2}{\pi})sin(\frac{\pi}{2}x)dx\\\\=(\frac{2}{\pi})xsin(\frac{\pi}{2}x)+(\frac{2}{\pi})^2cos(\frac{\pi}{2}x)+C\)

Next, you calculate the volume of the solid, by replacing the solution to the integral in the equation (1):

\(V=2\pi[(\frac{2}{\pi})xsin(\frac{\pi}{2}x)+(\frac{2}{\pi})^2cos(\frac{\pi}{2}x)]_0^1\\\\V=2\pi[(\frac{2}{\pi})-(\frac{2}{\pi})^2]=1,45u^3\)

hence, the volume of the solid generated is 1,45 cubic units

The Remainder when dividing f(x) by x - 3 is 840

The remainder when dividing the polynomial f(x) = 3x^5 + 4x^3 + 3 by the binomial x - 3, we can use the polynomial remainder theorem. According to the theorem, if we substitute the divisor, x - 3, into the polynomial f(x) and evaluate it at x = 3, the resulting value will be the remainder.

Let's calculate the remainder using this approach:

Substituting x = 3 into the polynomial f(x), we have:

f(3) = 3(3)^5 + 4(3)^3 + 3

    = 3(243) + 4(27) + 3

    = 729 + 108 + 3

    = 840

Therefore, when f(x) = 3x^5 + 4x^3 + 3 is divided by x - 3, the remainder is 840.

In summary, the remainder when dividing f(x) by x - 3 is 840.

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Let's denote the increase in both the radius and the height of the cylinders as 'x' inches.

The volume of a cylinder can be calculated using the formula V = πr²h, where V is the volume, r is the radius, and h is the height.

For the first cylinder (with original radius 8 inches and height 3 inches), the volume is given by V₁ = π(8)²(3) = 192π cubic inches.

For the second cylinder (with increased radius and height), the volume is given by V₂ = π(8 + x)²(3 + x).

Given that the resulting volumes are equal, we can set up the following equation:

V₁ = V₂

192π = π(8 + x)²(3 + x)

Canceling out the π from both sides, we have:

192 = (8 + x)²(3 + x)

Expanding the equation:

192 = (64 + 16x + x²)(3 + x)

192 = 192 + 48x + 16x² + 3x + x²

0 = 16x² + 51x

Simplifying the quadratic equation:

16x² + 51x = 0

x(16x + 51) = 0

Setting each factor equal to zero:

x = 0 (nonzero number of inches)

16x + 51 = 0

16x = -51

x = -51/16

Since we're looking for a nonzero increase, the increase is x = -51/16 inches.

Note: It's important to check the validity of the negative value for 'x' since it represents an increase. In this case, the negative value implies a decrease rather than an increase. Therefore, the increase in both the radius and the height is 0 inches.

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Answer:

12/5

Step-by-step explanation:

5/2 = 6/x

in order to solve for x, you can do cross multiplication hence,

5x = 6(2)

x = 12/5

Answer:

12/5

Step-by-step explanation:

5/2=6/x

5x=12

X=12/5.

So the answer is 12/5

If he got -4 = 4, the equation has no solution, due that the two numbers are not equal, so they're not an equation

Answer:

2nd option.

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

You should get this answer if you use the distance formula! :)

Answer:

13 mm

Step-by-step explanation:

V = πr²h

4,939.22 mm³ = 3.14 × (11 mm)²h

4,939.22 mm³ = 3.14 × (11 mm)²h

h = 13 mm

Answer: 13 mm

Hi :)

15x^12/18x^2

Factor 3 out of 15 and 18

3(5x^12)/3(6x^2)

Divide

5x^10/6

Answer:

\( \frac{15 {x}^{12} }{18 {x}^{2} } \\ \frac{15}{18} \times \frac{ {x}^{12} }{ {x}^{2} } \\ \frac{5}{6} \times {x}^{12- 2} \\ \frac{5}{6} \times {x}^{10} \\ \frac{5 {x}^{10} }{6} \)

If there is no landing, the object will have a mean velocity of -176 feet per second for the first 11 seconds of its flight.

When something is dropped, the force of gravity causes it to start moving at a faster rate. In this scenario, the acceleration of the object is said to be -32 feet per second squared, which indicates that it is accelerating in a downward direction. Since there is no initial velocity, we can calculate the average velocity by using the following formula:

The formula for calculating the average velocity is as follows: (starting velocity + final velocity) / 2.

Because the object begins its journey in a stationary position, its initial velocity is zero. We can use the equation of motion to figure out the ultimate velocity as follows:

Ultimate velocity is equal to the beginning velocity plus the acceleration multiplied by the amount of time.

After plugging in the provided values, we get the following:

ultimate velocity = 0 plus (-32 feet/second squared times 11 seconds) which is -352 feet per second.

Now that we have all of the data, we can determine the average velocity:

The average velocity is calculated as (0 + (-352 ft/s)) divided by 2, which equals -176 ft/s.

Therefore, assuming there is no landing, the object will have an average velocity of -176 feet per second over the first 11 seconds of its flight.

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