Please help with this question!!

The distance, d, that a certain car is from Math City after h hours, can be determined by the equation d=45h. The distance that a second car is from Math City can be determined by the equation d=25h+80. After how many hours will the two cars be the same distance from the Math City?

The p-value for this hypothesis test is 0.263.

In this case, the null and alternative hypotheses for a hypothesis test of the difference in two population proportions are:

null hypothesis: p1 = p2

alternative hypothesis: p1 > p2

Notice that the alternative hypothesis is a one-tailed test.

Suppose proportions z test method from stats models is used to perform the test and the output is (1.13, 0.263).

To find the p-value for this hypothesis test, we need to use the output from the statsmodels function.

The second number in the output is the p-value.

Therefore, the p-value for this hypothesis test is 0.263.

The first number in the output is the z-value, which is not relevant to finding the p-value. Therefore, we can ignore it. Answer: 0.263

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The probability P(E) is 13/15.

According to the statement

we have given that the S = {1, 3, 5, 7, 9}, E = {1, 5, 7}

And we have to find the probability P(E).

So, For this purpose

Recall the formula for the probability of an event E in case when all outcomes are equally likely:

P(E)= n(E) /n(S)

in which S is the sample space.

But we have the S = {1, 3, 5, 7, 9},

so, n(S) = Sum of all outcomes / number of outcomes

n(S) = 1+3+5+7+9 /5

n(S) = 25 /5

n(S) = 5 and

For n(E) = Sum of all outcomes / number of outcomes

n(E) = 1+5+7 /3

n(E) = 13 /3

n(E) = 13 /3

Substitute these values in the above written formula then

P(E)= n(E) /n(S)

P(E)=  (13/3)/ 5

P(E)= 13 /15

So, The probability P(E) is 13/15.

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Answer :-

a) = Let cement, sand and stone in the concrete be x, 2x and 3x,

Each bag of dry concrete is 30 kg,

so,

x + 2x + 3x = 30

or, 6x = 30

so, x = 5

Now,

one bag contaings 2×5 = 10 kg of sand.

He buys just enough sand,stone and cement to make 50 bags of dry concrete,

1 bag = 10 kg sand

50 bags = 10 × 50 kg sand = 500 kg of sand

So,

He buys 500 kg of sand.

b) =

1 bag contains

5 kg of cement, 2×5 = 10 kg of sand and 3×5 = 15 kg of stone,

so,

25 kg of cement = 5.50 euro

5 × 50 kg of cement = 5.50/25 × 250 euro = 55 euro

20 kg of sand = 2 euro

500 kg of sand = 2/20 × 500 euro = 50 euro

15 kg of stone = 3.9 euro

15 × 50 kg = 3.9/15 × 750 euro = 195 euro

Total for 50 bags, he spent 50 + 195 + 55 euro = 300 euro.

He sold it for 396 euro.

His profit percent = (396 - 300)/300 × 100%

So, His profit percent = 32%.

The answer is option c.

The p-value will be smaller than most reasonable significance levels. The p-value is defined as the probability of obtaining the observed results or a more extreme result, assuming that the null hypothesis is correct.

In the given situation, the null hypothesis is that the coin comes up heads 50% of the time or p ≥ 0.5. The alternative hypothesis is that the coin comes up heads less than 50% of the time or p < 0.5. A significance level is used to determine if the null hypothesis should be rejected.

If the p-value is smaller than the significance level, the null hypothesis is rejected, and the alternative hypothesis is accepted. If the p-value is larger than the significance level, the null hypothesis is not rejected. In this situation, Thomas observed more than half of the flips ended up heads, so he rejects the null hypothesis.

As a result, the p-value must be smaller than the significance level. Therefore, we know that the p-value will be smaller than most reasonable significance levels.

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Answer:

Okay so x greater then or equal to 7

To plot ask yourself:

Open or Closed Circle:

Open->, <

Closed-Greater then or equal to or less then or equal to

Also ask:

am i ploting to the left or to the right

Step-by-step explanation:

It is going to be a closed circle, since it is greater then or equal too

And you cand use the sign so it is going to go to the left <------ (that way)

You can use the sign to guied you ex: x>5 you are going to the right ---->

Also, for this topic just know if the equation is like this: 3>x

MAKE SURE TO SWICH IT TO THIS:

x<3

YOU HAVE TO SWITCH THE EQUATION AROUND AND THE SIGN

I hope this helped! :D

Answer:

x=-2

Step-by-step explanation:

Given equation:

8^x= 1/64

Ensure both sides of the equation are in power format by changing 1/64

1/64 = 64^-1

8^x = 64^-1

2^3(x) = 2^6(-1)

The bases will cancel out each other

3(x) = 6(-1)

3x = -6

x = -6/3

x = -2

Check

8^x = 1/64

x = -2

8^-2

= 1/8²

= 1/8*8

= 1/64

Complete question :

How many dimes might he have?

How many coins would he have altogether?

Answer:

11, 12, 13, 14 ;

16, 17, 18, 19

Step-by-step explanation:

Let :

Nickel = n

Dimes = d

Total number of nickels = 5

He has more than 2 times as many dimes as nickels ;

d > 2n

d > 2*5 ; d > 10

He has fewer than 3 times as many dimes as nickels;

d < 3n

d < 3*5 ; d < 15

Meaning he has more than 10 dimes but less than 15.

10 < d < 15

So, d could be ;

11, 12, 13, 14

Number of coins altogether :

11 + 5 = 16

12 + 5 = 17

13 + 5 = 18

14 + 5 = 19

Answer:

14.88m²

if you need the solution tell me

Answer:

it might be c or a i go with c

Step-by-step explanation:

not for sure just a best guess

We must represent the number 4.082, the options you are giving us are from an apparent decomposition of the previous number

The correct option is B: Four and eighty-two thousandths, It is indeed 4 whole units and 82 thousandths. The other options are not correct

Answer:

D

Step-by-step explanation:

The reason D is false is because it states that Sasha can make 2 bags per minute while she cant make 2 bags per minute. She can make half a bag per minute. D is wrong 100%

Answer:

Step-by-step explanation:

Distance covered = speed × time.

Sasha runs at a constant speed of 3.8 meters per second for 1/2 hour.

This means distance covered while running would be

3.8 × 1/2 = 1.9 meters

Then she walks at a constant rate of 1.5 meters per second for 1/2 hour. This means distance covered while walking would be

1.5 × 1/2 = 0.75 meters

Total distance that Sasha covered while running and walking in 60 minutes would be

1.9 + 0.75 = 2.65 meters

Step-by-step explanation:

Answer:

y=\(\sqrt[3]{x-1}\)

Step-by-step explanation:

y=x^3-1

Switch y and x

x=y^3-1

Solve for y

x-1=y^3

y=\(\sqrt[3]{x-1}\)

Answer:

Step-by-step explanation:

If a line with a slope passes through a point with a value such as in this one, which is (1,3), then it must have a y-intercept and a slope. The y-intercept is when the x-value's value is 0 but the y-value is more than 0.

(3,6) is on the line as it corresponds with the slope.

(0,0) is not on this line as the y-value nor the x-value has a coordinate, which is a requirement to make it an ordered pair.

The velocity of the airplane traveling 4500 miles West over 10 hours is 450 miles per hour. This calculation provides the speed at which the airplane is moving in the given direction.

To calculate the velocity of an airplane traveling 4500 miles West over 10 hours, we need to divide the distance traveled by the time taken.

Velocity is defined as the rate at which an object moves in a specific direction, and it is given by the formula:

Velocity = Distance / Time

In this case, the distance traveled by the airplane is 4500 miles West, and the time taken is 10 hours. Let's calculate the velocity:

Velocity = 4500 miles / 10 hours

Dividing 4500 by 10, we find:

Velocity = 450 miles per hour

Therefore, the velocity of the airplane traveling 4500 miles West over 10 hours is 450 miles per hour. This calculation provides the speed at which the airplane is moving in the given direction.

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We have verified that cosine equation cos(θ + 3π/2) is equal to sinθ using the sum and difference formulas.

To verify the identity cos(θ + 3π/2) = sinθ using the sum and difference formulas, we can rewrite the left side of the equation and simplify it using the trigonometric identities.

Using the sum formula for cosine, we have:

cos(θ + 3π/2) = cos(θ)cos(3π/2) - sin(θ)sin(3π/2)

Now, let's evaluate cos(3π/2) and sin(3π/2):

cos(3π/2) = 0 (cosine of 3π/2 is zero)

sin(3π/2) = -1 (sine of 3π/2 is -1)

Substituting these values back into the equation:

cos(θ + 3π/2) = cos(θ)(0) - sin(θ)(-1)

             = 0 + sin(θ)

             = sinθ

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Answer:

Step-by-step explanation:

if you divide the other equations you will get to x=0.5 and x=1

Answer:

Step-by-step explanation:

Find the value of x if the perimeter is 20

20 = X + 4X - 6 + X + 8

20 + 6 - 8 = 6X

18 = 6X

x = 18 : 6

x = 3

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

check

20 = 3 + 3 * 4 - 6 + 3 + 8

20 = 20

the answer is good

Answer:

Value of x is 3

Step-by-step explanation:

Given perimeter of figure = 20

x + (x+8) + (4x-6) = 20

x + x + 8 + 4x - 6 = 20

6x + 2 = 20

6x = 20 - 2

6x = 18

x = 18 / 6

x = 3

Using the P-value method of testing hypotheses with a significance level of 0.05, the sample provides strong evidence to support the claim that the mean score of job applicants from the university is greater than 160.

To test the claim that the mean score of job applicants from the university is greater than 160, we will perform a one-sample t-test using the P-value method. The null hypothesis (H0) assumes that the mean score is equal to 160, while the alternative hypothesis (Ha) assumes that the mean score is greater than 160.

First, we calculate the test statistic, which is the t-value. The formula for the t-value is:

t = (sample mean - hypothesized mean) / (sample standard deviation / sqrt(sample size))

Plugging in the given values, we have:

t = (183 - 160) / (12 /   √(25))

  = 23 / (12 / 5)

  = 23 * (5 / 12)

  ≈ 9.58

Next, we find the P-value associated with the test statistic. The P-value represents the probability of obtaining a test statistic as extreme as the observed value, assuming the null hypothesis is true. Since the alternative hypothesis is one-sided (greater than 160), we calculate the P-value by finding the probability of the t-distribution with 24 degrees of freedom being greater than the calculated t-value.

Consulting statistical tables or using software, we find that the P-value is very small (less than 0.0001).

Since the P-value (less than 0.0001) is less than the significance level (0.05), we reject the null hypothesis. This provides strong evidence to support the claim that the mean score of job applicants from the university is greater than 160.

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Answer:

A. \( \frac{1}{5} \)

Step-by-step explanation:

The scale factor of dilation is the ratio of the length of any of the corresponding sides of rectangle R'S'T'Q to rectangle PQRS.

R'S' = 3

RS = 15

Thus,

Scale factor = \( \frac{R'S'}{RS} = \frac{3}{15} \)

Simplify

Scale factor = \( \frac{1}{5} \)

Answer:

sos

Step-by-step explanation:

Because it permits one to assume that the sampling distribution of the mean would typically be normally distributed, the central limit theorem is helpful when examining big data sets. This makes statistical analysis and inference simpler.

Hypothesis :

In statistics, hypothesis testing is used to identify the variance in the group of data that results from genuine variation. Based on the presumptions, the sample data are taken from the population parameter. The hypothesis can be divided into many categories. A hypothesis is described in statistics as a formal statement that explains the relationship between two or more variables belonging to the specified population. It aids the researcher in converting the stated issue into an understandable justification for the study's findings. It provides examples of various experimental designs and guides the investigation of the research procedure.

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Answer:

x2−2x−8

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

By observation we just know that one of the angles of two triangles is the same.

There are two sides that are not equal in ability to determine similarity.

A logical argument cannot have a true conclusion and all true premises. A logical argument cannot have all true premises if it has a false conclusion. So at least one of the premises must be untrue.

If the premises and conclusion are connected in such a way that if the premises were true, then the conclusion would also have to be true, then the argument is considered valid.

FALSE. A strong argument has all true premises and is valid. Since a good argument is valid, it follows that the conclusion must also be true if all of the premises are true. A sound argument must have a true conclusion since a sound argument also has all true premises.

Hence we get the required answer.

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The  statement about probability that is true is option The probability of landing on orange is equal to the probability of landing on yellow.

From the  question, the spinner has:

8 sections, with:

So probability of one getting on any section is  = 1/8, or 0.125.

Therefore, the  probability of getting on orange will still be the same as the probability of landing on yellow and as such option C is correct.

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The equations representing the circle having a diameter of 12 units and a center lying on y-axis are x² + (y – 3)² = 36, and x² + (y + 8)² = 36, making options 1, and 5 the two choices.

In the question, we are looking for the equations of the circle having a diameter of 12 units and a center lying on y-axis.

The standard form of the equation of a circle is (x - h)² + (y - k)² + r², where (h, k) is the center of the circle, and r is its radius.

A circle having a diameter of 12 units, will have a radius of 12/2 = 6 units. Thus, r = 6.

A circle having the center on the y-axis will have a center as (0, k) as all points on the y-axis have x-coordinate 0.

Thus, the equation of the circle, with a diameter of 12 units and the center lying on the y-axis takes the form:

x² + (y - k)² = 6², or, x² + (y - k)² = 36.

From the given options, the equations x² + (y – 3)² = 36, and x² + (y + 8)² = 36, are of this form.

Thus, the equations representing the circle having a diameter of 12 units and a center lying on y-axis are x² + (y – 3)² = 36, and x² + (y + 8)² = 36, making options 1, and 5 the two choices.

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The provided question is incomplete. The complete question is:

"Which equations represent circles that have a diameter of 12 units and a center that lies on the y-axis? Select two options.

Answer:

x=5

you're welcome

the total decrease in value of the machine in the second 5 years after it was bought is $35000. option B is correct.

To find the total decrease in value of the machine in the second 5 years after it was bought, we need to integrate the rate of change of value over that time period.

Given that the rate at which the value changes is 500(t - 12) dollars per year, we can integrate this expression over the interval t = 12 to t = 17 (second 5 years).

The integral of 500(t - 12) with respect to t is:

∫[0 to 10] 500(t - 12) dt

= 500 ∫[0 to 10] (t - 12) dt

= 500 [(t²/2 - 12t) | [0 to 10]

= 500 [(10²/2 - 12*10) - (0²/2 - 12*0)]

= 500 [(50 - 120) - 0]

= 500 [-70]

= - 350000

Therefore, the total decrease in value of the machine in the second 5 years after it was bought is $35000. option B is correct.

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