8x+5x (im stupid ik)

To estimate the number of newborns who weighed between 2498 grams and 4326 grams, we need to find the proportion of newborns within this weight range based on a normal distribution.

First, we calculate the z-scores for the lower and upper limits of the weight range:

Lower z-score =\((2498-3412)/914=-1.00\)

Upper z-score = \((4326-3412)/914 = 1.00\)

Next, we look up the corresponding probabilities associated with these z-scores in the standard normal distribution table. The probability for a z-score of -1.00 is approximately 0.1587, and the probability for a z-score of 1.00 is also approximately 0.1587.

To estimate the number of newborns within this weight range, we multiply the total number of newborns (686) by the proportion of newborns within the range:

Number of newborns = \(686*(0.1587+0.1587)=686*0.3174=217.82\)

Rounding to the nearest whole number, we estimate that approximately 218 newborns weighed between 2498 grams and 4326 grams.

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The answer is the value of c is -8 and the value of d is 2.We know that every combination of v= ⎣⎡−3 3 0⎦⎤ and w= ⎣⎡−2 4 −2⎦⎤ has components that add to 0.

Now we can find c and d so that cv+dw= ⎣⎡2 2 −4⎦⎤ by solving for c and d.

Using matrix multiplication we can write this equation in the form of Ax = b as

⎡⎣−3 −2 2 2⎤⎦⎡⎣c d⎤⎦ = ⎡⎣2 4 −4⎤⎦

For solving the above equation we need to find the inverse of matrix A.

The inverse of matrix A is given as⎡⎣−3 −2 2 2⎤⎦−1= 110−12−12−1−11011−1−1−1−1

So the value of x can be found as⎡⎣c d⎤⎦ = ⎡⎣−8 2 −10⎤⎦

The values of c and d are -8 and 2 respectively.

Hence, the answer is the value of c is -8 and the value of d is 2.

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The probable reason that 37 runners broke the four-minute mile barrier within one year after Roger Bannister originally did in 1954 was due to the psychological barrier being broken.

Before Bannister's accomplishment, many believed that running a mile under four minutes was impossible for a human being. However, once Bannister proved it could be done, it changed people's beliefs about what was possible and opened up new possibilities.

This change in belief and perception likely inspired other runners to push themselves harder and believe that they too could achieve this feat, leading to a rapid increase in the number of people breaking the four-minute mile barrier. Additionally, advances in training techniques and equipment may have also played a role in this increase.

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thanks 4 the points lolllll

Answer:

someone deleted my answer, but thank you again.

Step-by-step explanation:

Answer:

4,35

Step-by-step explanation:

4/7 = 20/35

Converting it into ratio form

4:7 = 20:35

The Extremes of this proportion are 4,35

While, the means of this proportion are 7, 20

The sales tax rate for a specific type of wood-frame door priced at $1480 is 25%, or $370.

Percentages are just fractions with a denominator of 100. We use the percent sign (%) beside a number to indicate that it is a percentage. For instance, if you answered 75 questions correctly out of 100 on a test (75/100), you would have received a 75%. A percentage is a relative value that represents one hundredth of a quantity. One percent (symbolized 1%) is a hundredth part; thus, 100 percent represents the entire amount and 200 percent specifies twice the given quantity. A percentage is a fraction of a whole expressed as a number between 0 and 100.

Here,

Sale tax=$370

Price of door=$1480

Sales tax percent=370/1480*100

=25%

The rate of sales tax for a particular type of wood-frame door is priced at $1480 is 25% that is $370.

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Answer:

It will fit

Step-by-step explanation:

165 / 15 = 11

So b = 11

12.5 can fit in 15

and 5.3 can fit in 11 so it will fit.

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

A

Step-by-step explanation:

negative times a postive is always negative unless squared

Answer:

A. -21

Step-by-step explanation:

Note that when you multiply a negative with a positive number, your answer will be negative. Multiply as usual:

-3 * 7 = -21

A. -21 is your answer.

~

The solution of the given problem of quadratic equation  comes out to be factoring the binomial is the correct response.

Regression modelling uses the polynomial solution x = ax² + b + c=0 for one-variable equations. The First Hypothesis of Algebra claims that since this equation has a second order, there can only be one solution. There are simple and complex solutions available. Even as the name suggests, a "non-linear formula" has four variables. According to this, there might be just one squared word.

Here,

In Step 2, it appears that the binomial ax2 + bx in the equation -c = ax² + bx is being factored. The student has specifically factored out a "a" from the words ax2 and bx to get:

=>  a(x² + b/a x) = -c

The student's attempt to factor this same quadratic expression

ax² + bx by eliminating the two terms' "a" largest common factor serves as the best rationale for Step 2, as a result.

Thus, "factoring the binomial" is the correct response.

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The complete question is

" A student is deriving the quadratic formula. Her first two steps are shown. Step 1: –c = ax2 + bx Step 2: -c = a[x^2+b/ax] Which best explains or justifies Step 2? division property of equality factoring the binomial completing the square subtraction property of equality"

The solution of the DTDS is xn = (0.63)^n * 41 grams, where n represents time in hours.

a) The updating function f(x) for the discrete time dynamical system (DTDS) can be derived from the given information that the body eliminates 37% of the alcohol present in the body per hour.

Since 37% of the alcohol is eliminated, the amount remaining after one hour can be calculated by subtracting 37% of the current amount from the current amount. This can be expressed as:

f(x) = x - 0.37x

Simplifying the equation:

f(x) = 0.63x

b) The initial condition for the DTDS is given as Peter having 41 grams of alcohol in his body after consuming three alcoholic drinks. Therefore, the initial condition is:

x0 = 41 grams

c) To find the solution of the DTDS with the given initial condition, we can use the updating function f(x) and iterate it over time.

For n hours, the solution is given by:

xn = f^n(x0)

Applying the updating function f(x) repeatedly for n times:

xn = f(f(f(...f(x0))))

In this case, since the function f(x) is f(x) = 0.63x, the solution can be written as:

xn = (0.63)^n * x0

Substituting the initial condition x0 = 41 grams, the solution becomes:

xn = (0.63)^n * 41 grams

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Answer:

the answer is b hope you have fun

Answer:

Answer B

Step-by-step explanation:

Given, Level of significance, α = 0.005

Hypothesis,

H0: p ≥ 31%

H1: p < 31%To find,

Critical value and z_alpha

Since α = 0.005, the area in the tail is 0.005/2 = 0.0025 in each tail because the test is two-tailed.

Using a z table, find the z-score that corresponds to the area of 0.0025 in the left tail.

Then, the critical value is -2.576 rounded to 3 decimal places.

So, z_alpha = -2.576.

Hence, option (b) is correct.

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30 hours of use by the Washington family sprinkler and 35 hours of use by the Bennett family sprinkler.

We can find how long was each sprinkler used by substitution method.

Let W = hours of use by the Washington family

65 - W = hours of use by the Bennett family

According to the question we get

15W + 40(65 -W) = 1850

15W + 2600 - 40W = 1850

-25W = -750

W = 30

Now, put the value of W in 65 - W to calculate the hours used by the Bennett family

65 - W = 65 - 30 = 35

Thus, the amount of time used for sprinklers by the Washington family and the Bennett family is 30 hours and 35 hours, respectively.

--The given question is incomplete, the complete question is

"The Washington family and the Bennett family each used their sprinklers last summer. The water output rate for the Washington family's sprinkler was 15L per hour. The water output rate for the Bennett family's sprinkler was 40L per hour. The families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 1850L. How long was each sprinkler used?"--

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Answer:Elisa made the greater number of withdrawals

Step-by-step explanation:

208 divided by 26 is 8

245 divided by 49 is 5

Answer:

5

Step-by-step explanation:

divid lol

Answer:

\(x<\frac{y+8}{4}\)

​​  \(x\geq \frac{y}{4} -1\)

Step-by-step explanation:

no the answers aren't the same

The possible data in the question does not provide sufficient evidence available to support the alternative hypothesis that there is a difference between Mr. Starnes and Ms. McGrail's AP Statistics classes and Mr. Starnes did not stack the class.

In statistics, a hypothesis test is the performance of a test on an assumption made about a population parameter.

The possible data in the question, obtained from a similar online question, using MS Excel, indicates;

The mean of the Starnes GPA ≈ 3.212867

The standard deviation of Starnes GPA ≈ 0.364249

Mean of McGrail GPA ≈ 3.134722

The standard deviation of McGrail's GPA ≈ 0.357995

The null hypothesis is H₀: μ₁ - μ₂ = 0

The alternative hypothesis is Hₐ: μ₁ - μ₂ ≠ 0

The test statistic is found using the following formula;

\(t_0 = \dfrac{(\overline{x_1} - \overline{x_2})-(\overline{\mu_1}-\overline{\mu_2})}{\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2} } }\)

The decision rule is obtained with α = 0.05 and the null hypothesis is rejected t₀ ≤ -1.96 or t₀ ≥ 1.96

Therefore, we get;

\(t_0 = \dfrac{(3.212867 - 3.134722)-0}{\sqrt{\dfrac{0.364249^2}{15}+\dfrac{0.357995^2}{18} } } \approx 0.618\)

The parameter for the degrees of freedom is 15 - 1 = 14

The critical value obtained from the t-table, at t.₉₅ is 1.761 which is larger than 0.618, therefore, we fail to reject the null hypothesis, and the evidence is insufficient to suggest that there is a difference in the average score of the two AP Statistics classes.

Taking the variance to be the same, we get;

\(S_p^2= \dfrac{(n_1-1)\cdot s_1^2+(n_2-1)\cdot s_2^2}{n_1+n_2-2}\)

Therefore;

\(S_p^2= \dfrac{(15-1)\times 0.364249^2+(18-1)\times 0.357995^2}{15+18-2}\approx 0.1302\)

\(t_0 = \dfrac{(\overline{x_1} - \overline{x_2})-(\overline{\mu_1}-\overline{\mu_2})}{\sqrt{s_p^2 \times\left(\dfrac{1}{n_1}+\dfrac{1}{n_2} }\right) }\)

\(t_0 = \dfrac{(3.212867 - 3.134722)-0}{\sqrt{0.1302\times \left(\dfrac{1}{15}+\dfrac{1}{18} }\right) } \approx 0.6195\)

df = 15 + 18 - 2 = 31

From the t-table, the critical value is about 1.697, which is larger than 0.6195, therefore, the null hypothesis cannot be rejected and the evidence available is not enough to suggest that there is a difference between the grade point averages of Mr. Starnes and Ms. McGrail AP Statistics classes and Mr. Starnes did not stack the class

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Answer:

-3.5

Step-by-step explanation:

This is the answer.

The equivalent statement is a. If the bus has no fuel, then the bus stops.

The original statement is a conditional statement, which has the form "If A, then B." In this case, A is "the bus stops" and B is "the bus has no fuel." The contrapositive of a conditional statement is formed by negating both A and B, and then reversing the order. In this case, the contrapositive is "If the bus has no fuel, then the bus stops."

The contrapositive is equivalent to the original statement because they both have the same truth value. In other words, they are both true or false at the same time.

In this case, the contrapositive is true because if a bus has no fuel, then it cannot move. Therefore, if a bus stops, then it must have no fuel.

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The equivalent statement is a. If the bus has no fuel, then the bus stops.

The original statement is a conditional statement, which has the form "If A, then B." In this case, A is "the bus stops" and B is "the bus has no fuel." The contrapositive of a conditional statement is formed by negating both A and B, and then reversing the order. In this case, the contrapositive is "If the bus has no fuel, then the bus stops."

The contrapositive is equivalent to the original statement because they both have the same truth value. In other words, they are both true or false at the same time.

In this case, the contrapositive is true because if a bus has no fuel, then it cannot move. Therefore, if a bus stops, then it must have no fuel.

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Question 4: Laura applies for the position of ambulance medic. To give her a job simulation (behavioral interview) screening test, the interviewer...

This question involves providing a job simulation or behavioral interview, which allows the interviewer to observe how the candidate performs in a simulated work situation. This type of question assesses the candidate's skills, abilities, and behavior in a real or simulated work scenario, providing a more accurate evaluation of their capabilities for the job.

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II only- the distribution of the sample data.

A sampling distribution is a probability distribution of a statistic generated from more samples taken from a specific population.

The sampling distribution shows how the sample means will vary in repeated samples.

The mean is the most common kind of sampling distribution. This kind concentrates on figuring out the mean average of all sample means, which results in the sampling distribution.

A sampling distribution mean is obtained by adding together the average of each sample and reflecting the characteristics of the entire population.

As the number of samples increases, the standard deviation falls, resulting in a normal frequency distribution or a bell-shaped graph.

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A sampling distribution is a probability distribution of a statistic generated from more samples taken from a specific population.

The sampling distribution shows how the sample means will vary in repeated samples.

The mean is the most common kind of sampling distribution. This kind concentrates on figuring out the mean average of all sample means, which results in the sampling distribution.

9514 1404 393

Answer:

  0.579

Step-by-step explanation:

You can consider what the offered numbers are when they are rounded to hundredths:

  0.574 ⇒ 0.57

  0.579 ⇒ 0.58 . . . matches your requirement

  0.585 ⇒ 0.59

  0.681 ⇒ 0.68

The only number on the list that matches your rounding requirement is 0.579.

The TRUE statement is C. The equation 3h + 18 = 60 can be used to find h, and the assistant spends 14 hours on each of the other projects.

An equation is a mathematical statement about the equality or equivalence of two or more algebraic expressions.

An algebraic expression is a combination of variables, constants, numbers, and values with mathematical operands (addition, subtraction, division, and multiplication).

The total number of working hours per week = 60 hours

The amount of hours spent on scheduling travel = 18 hours

The amount spent on 3 other projects = 42 hours (60 - 18)

Let the hours spent on each of the three projects = h

h = 14 (42/3)

Given equation: 3h + 18 = 60

Substitute h = 14 in the equation:

3(14) + 18 = 60

42 + 18 = 60

Thus, the correct statement is Option C.

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If the sample size in part c is larger, then the sample standard deviation will be a better estimate of the population

standard deviation.  If the sample size is smaller, then the sample standard deviation will be less reliable and may not

be a good estimate of the population standard deviation.

To describe the standard deviation in part c relative to the population standard deviation from which the samples were

generated, you can use the concept of the sample standard deviation.

The sample standard deviation is a measure of the variation in a set of data that is calculated by taking the square root

of the variance of the data set. The variance is the average of the squared differences from the mean. It is important to

note that the sample standard deviation is an estimate of the population standard deviation, which is the true measure

of the variability in the population. The larger the sample size, the closer the sample standard deviation will be to the

population standard deviation. Therefore, if the sample size in part c is larger, then the sample standard deviation will

be a better estimate of the population standard deviation.

Conversely, if the sample size is smaller, then the sample standard deviation will be less reliable and may not be a

good estimate of the population standard deviation.

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The time it will take the riders to pass over the hill and reach ground level is 115.13 seconds. The correct option is the second option 115.13 seconds

From the question, we are to determine how long it would take riders to pass over the hill and reach ground level.

To determine how long it would take the riders to pass over the hill and reach ground level, we will set h = 0 in the given equation.

The given equation is

h = -0.054t² + 6t + 25

Set h = 0

0 = -0.054t² + 6t + 25

Solve the quadratic equation using the quadratic formula,

t = [-b ± √(b² - 4ac)] / 2a

From the equation,

a = -0.054, b = 6, and c = 25

Then,

t = [-b ± √(b² - 4ac)] / 2a

t = [-(6) ± √((6)² - 4(-0.054)(25))] / 2(-0.054)

t = [-6 ± √(36+ 5.4)] / -0.108

t = [-6 ± √(41.4)] / -0.108

t = [-6 ± 6.434] / -0.108

t = [-6 + 6.434] / -0.108 OR t = [-6 - 6.434] / -0.108

t = 0.434/-0.108 OR t = -12.434/-0.108

t = -4.02 OR t = 115.13

Since t cannot be negative

Hence, t = 115.13 seconds

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We may determine that the triangles are congruent based on the (B) HL criterion right away.

According to the HL Postulate, a right triangle's hypotenuse and leg are congruent if they are also congruent with the hypotenuse and leg of another right triangle.

So, we can see from the accompanying figure that these two triangles share a center line that is parallel to the base.

The two triangles are therefore right-angled triangles.

The hypotenuse of two triangles being congruent is then mentioned as a further argument.

Triangle congruence according to the HL criterion allows for a quick determination of congruence.

Therefore, we may determine that the triangles are congruent based on the (B) HL criterion right away.

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Complete question:
Which criteria for triangle congruence allows you to immediately conclude that the triangles are congruent without any extra steps?

A) SAS

B) HL

C) AAS

D) none