9 of the 13 participants in a triathlon are men and the rest are women. What is the ratio of the number of women participating to the total number of participants?

Answer: Skewed left. (If there is an answer choice for it)

Step-by-step explanation: The data on the Y-Axis is higher on the left side of the graph than the right side of the graph. If it was higher on the right side of the graph, then it would be skewed right. Hope this helps!

Answer:

12/6 = 2 miles per second for d

15/5 = 3 miles per second for c

c runs faster because runs 3 miles every second while d only runs 2 miles per second

Step-by-step explanation:

Answer:

a, b. c, e

Step-by-step explanation:

Hence, Justin will have to ask for 1480 from family and friends  to cover cost.

What is cost?

Amount at which any product prices , that is it can be sold or bought.

How to calculate?

I Tuition = -$2,900

Other educational expenses = -$280

Housing and living expenses =- $4,100

estimates of grants= $3,500

work-study program =$2,800

savings = $500

hence cost = 3500-2900-280-4100+2800-500=-1480

∴ Justin will have to ask for 1480 from family and friends  to cover cost.

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Answer:

4711

Step-by-step explanation:

Answer by rothauserc(4711)   (Show Source):  

You can put this solution on YOUR website!

the probability that the first student picked has a lunch is 6/9 or 2/3

the probability that the second student picked has a lunch is 5/8

Answer:

8.40

Step-by-step explanation:

42 divided by 5 equals 8.40 so each person would have to pay $8.40

Final answer:

The expression to represent the split cost of a $42 bill by five friends is 42 / 5, or $8.40 per person.

Explanation:

The expression representing the number of dollars each person paid when five friends split a $42 lunch bill equally would be $42 divided by 5. This can also be written as 42 / 5, which equals $8.40 per person.

For additional practice, let's look at a similar scenario: Mr. and Mrs. Green and their four children went out to dinner, and the meal cost was $72 with a restaurant-added tip of 18%. To find the total cost of the dinner, first calculate the tip amount by multiplying 18% (or 0.18) by the cost of the meal ($72). The tip would be $12.96. Adding this to the original cost, the total comes to $84.96.

Answer:

6?    i hope this helps some!   :)

Step-by-step explanation:

each has 6 in between the number

5 or 6 p there is a possibility of there being 6

7 or 8 there is at least 6 in this cup

6 or 7 there is at least 6 in this cup

7 or 5 there is a possibility of there being 6

Final answer:

There are either 7 or 5 sweets under each cup. The declaration 'Seven or five' is correct.

Explanation:

Each cup has a declaration about the number of sweets in it: 'Five or six', 'Seven or eight', 'Six or seven', and 'Seven or five'. Only one of the declarations is correct. To find the number of sweets under each cup, we need to analyze the given information.

If the declaration 'Five or six' is correct, then there can be 5 or 6 sweets under the cup. But since there are no other cups with 5 or 6 as a declaration, this declaration cannot be correct.

If the declaration 'Seven or eight' is correct, then there can be 7 or 8 sweets under the cup. But since there are no other cups with 7 or 8 as a declaration, this declaration cannot be correct.

If the declaration 'Six or seven' is correct, then there can be 6 or 7 sweets under the cup. But since there is another cup with the declaration 'Seven or five', and both declarations share the number 7, this declaration cannot be correct.

Therefore, the only remaining declaration 'Seven or five' must be correct. So, there are either 7 or 5 sweets under the cup with this declaration.

In conclusion, there are either 7 or 5 sweets under each cup, and the declaration 'Seven or five' is correct.

The question is :

2x²y'' + 5xy' + y = x² - x;

y = c1x^(1/2) + c2x^(-1) + 1/15(x^2) - 1/6(x), (0,infinity)

The functions (x^-1/2) and (x^-1) satisfy the differential equation and are linearly independent since W(x^-1/2, x^-1)= ____?____ for 0

Answer:

The functions x^(-1/2) and x^(-1) are linearly independent since their wronskian is (-1/2)x^(-5/2) ≠ 0.

Step-by-step explanation:

Suppose the functions x^(-1/2) and x^(-1) satisfy the differential equation 2x²y'' + 5xy' + y = x² - x;

and are linearly independent, then their wronskian is not zero.

Wronskian of y1 and y2 is given as

W(y1, y2) = y1y2' - y1'y2

Let y1 = x^(-1/2)

y1' = (-1/2)x^(-3/2)

Let y2 = x^(-1)

y2' = -x^(-2)

W(y1, y2) =

x^(-1/2)(-x^(-2)) - (-1/2)x^(-3/2)x^(-1)

= -x^(-5/2) + (1/2)(x^(-5/2)

= (-1/2)x^(-5/2)

So, W(y1, y2) = (-1/2)x^(-5/2) ≠ 0

Which means the functions are linearly independent.

The functions [tex]\rm (x^\frac{-1}{2})[/tex] and [tex]\rm (x^{-1})[/tex] satisfy the differential equation and are linearly independent since [tex]W(x^{-1/2}, x^{-1})[/tex] = [tex](-x^{5/2} )+ \dfrac{1}{2}.(x^{5/2})[/tex] .

Given that,

The given two-parameter family of functions is the general solution of the non-homogeneous differential equation on the indicated interval.

[tex]\rm 2x^2y^n+5xy'+y = x^2-x[/tex]

[tex]\rm y = c_1x^{\frac{-1}{2} }+c_2{-x} \dfrac{1}{15}x^2=\dfrac{1}{5}x ,[/tex]

We have to determine,

The functions [tex]\rm (x^\frac{-1}{2})[/tex] and [tex]\rm (x^{-1})[/tex] satisfy the differential equation and are linearly independent since [tex]W(x^{-1/2}, x^{-1})[/tex] for 0?

According to the question,

The functions [tex]\rm (x^\frac{-1}{2})[/tex] and  [tex]\rm (x^{-1})[/tex] satisfy the differential equation,

[tex]\rm 2x^2y^n+5xy'+y = x^2-x[/tex]

And are linearly independent, then their differentiation is not zero.

The differential equation is given by,

[tex]\rm Y(y_1, y_2) = y_1.y_2'- y_2.y_1'[/tex]

The value  [tex]\rm y_1'[/tex] is,

[tex]\rm y_1 = x^{(-1/2})\\\\ y_1' = \dfrac{-1}{2} x^{(-3/2)}[/tex]

And value of [tex]\rm y_2'[/tex]

[tex]\rm y_2 = x^{(-1)}\\\\y_2' = -x^{(-2)}[/tex]

Therefore,

[tex]\rm Y(y_1, y_2) = (x^{-1/2}.(-x)^{-2}-(-\dfrac{1}{2}.x^{-3/2}).(x^{-1})\\\\\rm Y(y_1, y_2) = (-x^{5/2} )+ \dfrac{1}{2}.(x^{5/2})\neq 0\\\\[/tex]

Hence, The value of the function is not equal to zero then the function is linearly independent.

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The expected value of this marble-drawing game is approximately -$0.032, meaning that you would expect to lose about 3.2 cents per play on average.

In order to calculate the expected value of this marble-drawing game, you need to consider the probability of drawing each color of marble and the payoff associated with each one. The probabilities are as follows: P(gold) = 3/31, P(silver) = 6/31, and P(black) = 22/31, based on the quantities provided in the bag. The payoffs are $3 for a gold marble, $2 for a silver marble, and -$1 for a black marble.

The formula for expected value, E(X), is given by:

E(X) = (P(gold) * payoff gold) + (P(silver) * payoff silver) + (P(black) * payoff black)

Substituting the given values leads to:

E(X) = (3/31 * $3) + (6/31 * $2) + (22/31 * -$1)

After calculations, we get:

The expected value in playing this game would be -$0.032 approximately. This means that on average, you would expect to lose about 3.2 cents per play.

Salt flows in at a rate of

(2 g/L) * (4 L/min) = 8 g/min

and out at a rate of

(B/(200 + t) g/L) * (3 L/min) = 3B/(200 + t) g/min

where B is the amount of salt in the tank at time t.

Then the net rate at which B changes is governed by the ODE,

[tex]B'=8-\dfrac{3B}{200+t}[/tex]

[tex]B'+\dfrac{3B}{200+t}=8[/tex]

Multipy both sides by [tex](200+t)^3[/tex]:

[tex](200+t)^3B'+3B(200+t)^2=8(200+t)^3[/tex]

[tex]\left(B(200+t)^3\right)'=8(200+t)^3[/tex]

Integrate both sides:

[tex]B(200+t)^3=2(200+t)^4+C[/tex]

[tex]B=2(200+t)+C(200+t)^{-3}=\dfrac{2(200+t)^4+C}{(200+t)^3}[/tex]

The tank starts with 30 g of salt, so B(0) = 30, which gives

[tex]30=2(200) + C(200)^{-3}\implies C=-2,960,000,000[/tex]

Answer:

Step-by-step explanation:

kupa

645665465

Answer:

y=x(x-2)

Step-by-step explanation:

Answer:

4 pints

Step-by-step explanation:

There are 8 pints in one gallon, and 2 pints in one quart.

Carrie has 3 gallons of paint. 8*3 = 24 pints of paint.

Bryan has 10 quarts of paint. 10*2 = 20 pints of paint.

24 - 20 = 4. Carrie has 4 more pints of paint.

Answer:

Step-by-step explanation:

The solution of the quadratic equation is x = ±3/7

Quadratic equations are equations that have a leading degree of 2

Given the quadratic function

49x^2 = 9

Divide both sides by 49
49x^2/49 = 9/49
x^2 = 9/49
x = √9/49
x = ±3/7

Hence the solution of the quadratic equation is x = ±3/7

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Here,

py+qy=-4y+8

or, py+qy+4y=8

or,y(p+q+4)=8

therefore,

y=8/(p+q+4)

Answer:

0.9975

Step-by-step explanation:

check  the attached files below

Answer:

47

Step-by-step explanation:

Since the 5 numbers have a mean of 11, the sum of the numbers is 5 X 11 = 55. To make the largest number as large as possible, we make the other numbers must be as small as possible. However, in order for the median to be 3, the middle number must be 3. Since this is the middle number, there must be two other numbers that are at least 3. So, we let three of the other four numbers be 1, 1, and 3 to make them as small as possible. Finally, this means the remaining number is 55 - 1 - 1 - 3 - 3= 47. Hope that helps!

Answer:

47

Step-by-step explanation:

6 out of 30 times would be written as

6/30 which reduces to 1/5 which would mean the spinner is divided into 5 different colors.

There could be more than one solution. The spinner could be divided into 10 spaces and red could be 2 of the spaces, or any other multiple of 5s

Answer:

The spinner has 5 equal sections, with one section red.

It can have 5N equal sections, with N sections Red

Step-by-step explanation:

p(red) = 6/30 = 1/5

1/5 = 2/10

Out of 10 sections, 2 are Red

In general,

It can have 5N equal sections, with N sections Red

The special triangle you need is a right isosceles triangle, with legs 1 and hypotenuse [tex]\sqrt{2}[/tex].

As for every right triangle, you can find of the cosine of an angle using the "adjacent/hypotenuse" ratio.

In this case, the two base angles are equal, and so are the two legs. So, it doesn't matter which angle or leg you'll choose, the ratio will be

[tex]\cos(45)=\dfrac{1}{\sqrt{2}}[/tex]

which indeed is both the sine and cosine of 45°

Its approximated value is 0.707...

The cosine of 45 degree as a fraction and as a decimal to the nearest hundredth are  [tex]\( \frac{\sqrt{2}}{2} \)[/tex] and 0.71 respectively.

In a 45-45-90 triangle, which is a special right triangle, the sides are in the ratio [tex]\( 1:1:\sqrt{2} \).[/tex] This means if the legs (both shorter sides) are [tex]\( a \)[/tex], then the hypotenuse is [tex]\( \sqrt{2} \cdot a \).[/tex]

To find the cosine of [tex]\( 45^\circ \):[/tex]

The cosine of an angle in a right triangle is given by the ratio of the adjacent side to the hypotenuse. In a 45-45-90 triangle, each leg is adjacent to the 45° angle, and the hypotenuse is opposite the 90° angle.

Therefore, [tex]\( \cos(45^\circ) = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{a}{\sqrt{2} \cdot a} \).[/tex]

Simplifying this gives:

[tex]\[ \cos(45^\circ) = \frac{a}{a\sqrt{2}} = \frac{1}{\sqrt{2}} \][/tex]

Rationalizing the denominator:

[tex]\[ \cos(45^\circ) = \frac{1}{\sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}} = \frac{\sqrt{2}}{2} \][/tex]

Therefore, the cosine of [tex]\( 45^\circ \)[/tex] as a fraction is [tex]\( \frac{\sqrt{2}}{2} \).[/tex]

To find the decimal value of [tex]\( \frac{\sqrt{2}}{2} \):[/tex]

First, approximate [tex]\( \sqrt{2} \):[/tex]

[tex]\[ \sqrt{2} \approx 1.414 \][/tex]

Now, calculate [tex]\( \frac{1.414}{2} \):[/tex]

[tex]\[ \frac{1.414}{2} \approx 0.707 \][/tex]

Rounded to the nearest hundredth, the decimal form of [tex]\( \cos(45^\circ) \)[/tex] is 0.71.

The diagram of question is:

Answer:

E: None of the above

Step-by-step explanation:

Hello!

The objective is to find out how much time it takes people to commute to work.

Two samples where taken and two hypothesis tests where made:

One:

Sample mean 71 min; p-value: 0.03

Two:

Sample mean 72 min; p-value: 0.06

You have to choose from the options, a possible pair of hypotheses used for these two tests.

The parameter of the study is the population mean μ.

In the statistic hypotheses, the parameters are given either a known population value or a suspected value. So all options including sample values are wrong.

As said before the objective of the survey is to "determine how much time people spend commuting to work" in other words, whether or not the population mean is equal to a certain value.

H₀: μ = μ₀

H₁: μ = μ₀

Where μ₀ represents the theoretical value of the population mean. As you can say the hypotheses pair is two-tailed, not one-tailed.

Then the correct answer is E: None of the above

I hope this helps!

Answer:

the original cost is $30 , the percent of the markup is 30% , the markup amount is $9 , the new price is $39.

Step-by-step explanation:

Answer:

$30,30%,9,39

Step-by-step explanation:

ik u hate edgunity good thing this is ur last day

Answer:

x^3-x^2-17x+12

Step-by-step explanation:

Multiply

The volume of a cube is found using the formula v = s^3, where s is the length of a side.

The volume of a cube with a side of 1/2cm is

V = 1/2^3 = 1/8 cubic cm.

Now multiply the volume of one cube by total cubes:

1/8 x 96 = 12 cubic cm

The prism has a volume of 12 cubic cm.

Answer:

it is 12 if u still need it

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

It works with the second one

The recursive formula for the arithmetic sequence 12, 10, 8, 6, ... is a sequence where a(1) = 12, and a(n) = a(n - 1) - 2.

The recursive formula of an arithmetic sequence is a rule that uses each term to find the next. In this case, we start with the first term of the sequence, which is 12, and each following term decreases by 2. So, to find any term in the sequence, we take the previous term and subtract 2.

The recursive formula for the arithmetic sequence 12, 10, 8, 6, ... is:

a(1) = 12

a(n) = a(n - 1) - 2

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Answer:

We need to conduct a hypothesis in order to test the claim that the true proportion is equal to 14.6% or not. So we need to use a one proportion z test and the system of hypothesis are:  

Null hypothesis:[tex]p=0.146[/tex]  

Alternative hypothesis:[tex]p \neq 0.146[/tex]  

A. One-proportion z-test

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

[tex]z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}[/tex] (1)  

And the conditions required are:

1) The data comes from a random sampling

2) Independence condition between observations

3) np>10 and n(1-p)>10

4) The sample size is 10 times lower than the population size.

Step-by-step explanation:

Data given and notation

n=865 represent the random sample taken

X=159 represent the housing units that are vacant

[tex]\hat p=\frac{159}{865}=0.184[/tex] estimated proportion of vacant units

[tex]p_o=0.146[/tex] is the value that we want to test

[tex]\alpha[/tex] represent the significance level

z would represent the statistic (variable of interest)

[tex]p_v[/tex] represent the p value (variable of interest)  

Solution to the problem

We need to conduct a hypothesis in order to test the claim that the true proportion is equal to 14.6% or not. So we need to use a one proportion z test and the system of hypothesis are:  

Null hypothesis:[tex]p=0.146[/tex]  

Alternative hypothesis:[tex]p \neq 0.146[/tex]  

A. One-proportion z-test

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

[tex]z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}[/tex] (1)  

And the conditions required are:

1) The data comes from a random sampling

2) Independence condition between observations

3) np>10 and n(1-p)>10

4) The sample size is 10 times lower than the population size.

Answer:

The probability that Jones is lying is 6/7

Step-by-step explanation:

First we will list out 2 different cases when the outcome is a lie

1.probability that Jones tells lies is = 0.6 and probability that dalgiliesh analyses it correctly is 0.8

So the probability that dagliesh correctly analyses that he is telling lies is 0.8*0.6=0.48

2.Probability that Jones tells truth is 0.4 and if dagliesh analyses it incorrectly (which has a probability of 0.2) the outcome(as analysed by dagiliesh) is a lie

So probability that dagliesh analyses Jones truth as a lie is 0.2*.0.4=0.08

Total probability of outcome being a lie is 0.48+0.08=0.56

But we need the probability of Jones actually saying a lie which is nothing but 0.48/0.56= 6/7

The probability of that Jones is lying is [tex]\frac{6}{7}[/tex] .

Probability is defined as, divide favourable outcomes by total outcomes.

First case:

Probability that Jones tells lies is = 0.6

Probability that Dalgliesh analyses it correctly is, =  0.8

Therefore,  the probability that Dalgliesh correctly analyses that Jones is telling lies is,

                       [tex]P=0.8*0.6=0.48[/tex]

Second case :

Probability that Jones tells truth is, =  0.4

Probability of Dalgliesh  analyses it incorrectly that Jones tells truth is,

                                                = 0.2

So, Probability that Dalgliesh analyses Jones truth as a lie is,

                          [tex]0.2*.0.4=0.08[/tex]

Total probability of outcome being a lie is,

                               [tex]0.48+0.08=0.56[/tex]

Thus, Probability of Jones telling lie is,  [tex]=\frac{0.48}{0.56} =\frac{6}{7}[/tex]

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Answer:

standard deviation = ±0.4667

Step-by-step explanation:

In Normal distribution, approximately 68% of all the data lie within 1 standard deviation from the mean, approximately 95% of all the data lie within 2 standard deviations from the mean and approximately 99.7% of all the data lie within 3 standard deviations from the mean.

Therefore, for a confidence interval of 99.7% the standard deviation of the x¯ must be 3 standard deviations from the mean,

3σ = ±1.4

σ = ±1.4/3

σ = ±0.4667

Therefore, 0.4667 is the standard deviation that x¯ must have so that 99.7% of all samples give an x¯ within 1.4 point of μ.

Answer:

8 hours

Step-by-step explanation:

6x+20=68

subtract 20 from both sides

6x=48

divide 6 both sides

x=8

Answer:

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

because 4x4 is 16 and 16 x four is 64

Answer:

4³

I think this is right. the problem isnt explained very well.