Answer:
Approximately 7 people.
Step-by-step explanation:
Make a proportion of x/6 and divide 40 by 6. We get 6.23333...
This is approximately 7 people.
ΔABC is similar to ΔDEF. m∠BAC = (x² - 5x)º, m∠BCA = (4x - 5)º and
m∠EDF = (4x + 36)º. Find m∠F.
please show your work.
Thus, m∠F = 33º for the corresponding angle measures for each similar triangle ΔABC and ΔDEF.
To start, we know that similar triangles have corresponding angles that are congruent. Therefore, we can set up the following proportion:
m∠BAC/m∠EDF = m∠BCA/m∠DFE
Substituting the given angle measures, we get:
(x² - 5x)/(4x + 36) = (4x - 5)/m∠F
To solve for m∠F, we need to isolate it on one side of the equation. First, we can cross-multiply to get:
(4x - 5)(4x + 36) = (x² - 5x)m∠F
Expanding the left side, we get:
16x² + 116x - 180 = (x² - 5x)m∠F
Next, we can divide both sides by (x² - 5x):
(16x² + 116x - 180)/(x² - 5x) = m∠F
Simplifying the left side, we get:
(4x + 29)/(x - 5) = m∠F
Therefore, m∠F = (4x + 29)/(x - 5).
To check our answer, we can plug in a value for x and find the corresponding angle measures for each triangle. For example, if x = 6:
m∠BAC = (6² - 5(6))º = 16º
m∠BCA = (4(6) - 5)º = 19º
m∠EDF = (4(6) + 36)º = 60º
Using our formula for m∠F, we get:
m∠F = (4(6) + 29)/(6 - 5) = 33º
We can see that this satisfies the proportion and therefore our answer is correct.
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The ________ is the standard deviation of the sampling distribution of the mean or proportion. Group of answer choices variance standard deviation standardized variate standard error
The standard error is the standard deviation of the sampling distribution of the mean or proportion.
When we take a sample from a population, the mean or proportion of that sample may differ from the true mean or proportion of the population.
This difference is known as sampling error. The standard error is a measure of the variability of the means or proportions that would be obtained from different samples drawn from the same population.The standard error is calculated by dividing the standard deviation of the population by the square root of the sample size. It is important to note that as the sample size increases, the standard error decreases. This is because larger sample sizes provide more precise estimates of the population mean or proportion.The standard error is an important concept in statistical inference. It is used to calculate confidence intervals and hypothesis tests for the population mean or proportion based on the sample mean or proportion. In summary, the standard error is a crucial statistical parameter that provides information about the reliability of our estimates of population parameters based on sample data.Know more about the standard error
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The results of a paired-difference test are shown below to the right. d = 5.6
a. Construct and interpret a 99% confidence interval estimate for the paired difference Sd =0.25 in mean values.
b. Construct and interpret a 90% confidence interval estimate for the paired difference n=16 in mean values_ (Round to two decimal places as needed:) Choose the correct answer below:
OA This interval will contain the true population mean 90% of the time_
OB. There is a 90% chance that the true population mean is contained in the interval.
Oc: If many random samples of this size were taken and intervals constructed, 90% of them would contain the true population mean: 0
D. Approximately 90% of the differences will be contained in the interval.
If many random samples of this size were taken and intervals constructed, 90% of them would contain the true population mean. In repeated sampling, about 90% of the constructed confidence intervals will capture the true population mean difference. The correct answer is C.
When we construct a confidence interval, it is important to understand its interpretation. In this case, the correct answer (Oc) states that if we were to take many random samples of the same size and construct confidence intervals for each sample, approximately 90% of these intervals would contain the true population mean difference.
This interpretation is based on the concept of sampling variability. Due to random sampling, different samples from the same population will yield slightly different sample means.
The confidence interval accounts for this variability by providing a range of values within which we can reasonably expect the true population mean difference to fall a certain percentage of the time.
In the given scenario, when constructing a 90% confidence interval for the paired difference, it means that 90% of the intervals we construct from repeated samples will successfully capture the true population mean difference, while 10% of the intervals may not contain the true value.
It's important to note that this interpretation does not imply a probability or chance for an individual interval to capture the true population mean. Once the interval is constructed, it either does or does not contain the true value. The confidence level refers to the long-term behavior of the intervals when repeated sampling is considered.
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suppose a package delivery company purchased 28 trucks at the same time. five trucks were purchased from manufacturer a, four from manufacturer b, and five from manufacturer c. the cost of maintaining each truck was recorded. the company used anova to test if the mean maintenance costs of the trucks from each manufacturer were equal. to apply the f-test, how many degrees of freedom must be in the denominator?
As calculated from the data given 24 degrees of freedom must be in the denominator.
df of the numerator is -1
c = 5 - 1 = 4
df of the denominator is - c
n-c = 28 - 4 = 24
In the formal description of the state of a physical system, it is a separate physical parameter. The term "degrees of freedom" describes the variety of spatial motions, rotations, and vibrations that a gas phase molecule may make. When applying the equipartition theorem to calculate the values of various thermodynamic variables, the degree of freedom a molecule has an impact.
Degrees of freedom come in three different categories, including translational, rotational, and vibrational. The number of atoms in a molecule and the geometry—the arrangement of the atoms in space—of the molecule both affect the number of degrees of freedom of each kind the molecule possesses.
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Find the independent variable and dependent and write an equation (gr 9 hw) 1) To fix a car, Fix-it Auto charges a base fee of $20 plus $40 per hour. 2) The cost of a banquet at Jean's Banquet Hall is $450 for the rental of the hall and $15 per guest. 3) An author earns a royalty of $1.25 for each book sold. 4) Marie has $500 in her bank account. Each week she plans to deposit $20.
Answer:
Step-by-step explanation:
Using the regression equation :
y = mx + c
y = dependent variable ; x = independent variable ; m = slope ; c = intercept
1.) base fee = $20 ; hourly charge = $40
Hourly charge = independent
Total charge = dependent
Total charge = 40x + 20
x = Number of hours
2.) rental fee = $450; charge per guest = $15
Total rental fee = dependent
Independent = $15 = charge per guest
Number of guest = x
Total fee = 15x + 450
3.)
Royalty earned = dependent variable
Cost per book = $1.25 = independent
Royalty earned = $1.25 * number of books
4.)
Amount deposited per week = $20 = independent variable
Amount in account = dependent variable
y = 500 + 20x
x = number of weeks
Determine the approximate angle of sunrise and sunset for February 3 for WPU, NJ, approximate latitude: 40 degrees north. (Use the closest equinox date for calculation).
a) 90 degrees sunrise, 270 degrees sunset
b) 102 degrees sunrise, 258 degrees sunset
c) 78 degrees sunrise, 282 degrees sunset
d) 66.5 degrees sunrise, 293.5 degrees sunset
e) 113.5 degrees sunrise, 246.5 degrees sunset
The approximate angle of sunrise for February 3 at WPU, NJ, with an approximate latitude of 40 degrees north, would be around 66.5 degrees, and the approximate angle of sunset would be around 293.5 degrees.
To determine the approximate angle of sunrise and sunset for a specific location and date, we can use the knowledge that on the equinox, the sunrise and sunset angles are at their extremes. The equinox occurs around March 21 and September 21. Since we are looking for February 3, which is closer to the March equinox, we can use the values for the March equinox.
On the equinox, the sunrise and sunset angles are approximately 66.5 degrees and 293.5 degrees, respectively. These values correspond to the direction measured clockwise from due north.
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A sumbarine is exploring the pacific ocean. At 502.5 feet below sea level, the water temperature is 63 1/4 °F. The sumbarine dives down 115 feet deeper, and the water temperature drops by 2 1/5 °F. What were the elevation and the water temperature after the sumbarine dove?
Answer:
After driving, the elevation is 617.5 feet and the temperature is 61 1/20 °F;
A: 502 1/2 feet
Step-by-step explanation:
After driving: H = 502.5 + 115 = 617.5 feet; T = 63 1/4 - 2 1/5
= 61 1/2 °F ; Part A : 502.5 feet = 502 1/2 feet
[ simple calculation ]
Simon and his track team ran on the Heron Peak running trail yesterday after school. The team ran 2 miles due west from the parking lot to a bench. They turned at the bench to run 1.5 miles due north toward an outhouse. To finish the run, the team ran a straight line from the outhouse back to the parking lot. If Simon ran at a constant rate of 8 miles per hour, how long did it take Simon to finish the run?
If necessary, round your answer to the nearest tenth.
how many minutes?
It took Simon 45 minutes to finish the run.
What is distance?
Distance is the measure of how far apart two objects or locations are from each other. It is usually measured in units such as meters, kilometers, miles, or feet.
To solve this problem, we need to use the distance formula:
Distance = Rate x Time
We can break down the run into three parts: the 2 miles due west, the 1.5 miles due north, and the straight line back to the parking lot.
For the first part, Simon ran 2 miles at a rate of 8 miles per hour. Therefore, the time it took him to run this part of the trail was:
Time = Distance / Rate
Time = 2 miles / 8 miles per hour
Time = 0.25 hours
For the second part, Simon ran 1.5 miles at a rate of 8 miles per hour. Therefore, the time it took him to run this part of the trail was:
Time = Distance / Rate
Time = 1.5 miles / 8 miles per hour
Time = 0.1875 hours
To find the distance of the last part, we need to use the Pythagorean theorem to find the hypotenuse of the right triangle formed by the 2-mile and 1.5-mile legs:
c² = a² + b²
c² = 2² + 1.5²
c² = 4 + 2.25
c² = 6.25
c = sqrt(6.25)
c = 2.5 miles
So, Simon ran 2.5 miles at a rate of 8 miles per hour. Therefore, the time it took him to run this part of the trail was:
Time = Distance / Rate
Time = 2.5 miles / 8 miles per hour
Time = 0.3125 hours
Finally, we can add up the times for each part of the trail to find the total time it took Simon to finish the run:
Total Time = 0.25 hours + 0.1875 hours + 0.3125 hours
Total Time = 0.75 hours
To convert this to minutes, we can multiply by 60:
Total Time = 0.75 hours x 60 minutes/hour
Total Time = 45 minutes
Therefore, it took Simon 45 minutes to finish the run.
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Simplifier chacune des expressions suivantes et identifier la nature du nombre obtenu.
= 2 +
2
3
; =
2
5
+ 7; = (√3 + 1)(√3 − 1) ; = (√5 + 1)²
Answer:its 5
Step-by-step explanation: cuz
shannon's living room is a 12 bye 18 foot rectangle. She wants to cover as much of the floor as possible with 6 foot diameter circular rugs without overlap 1). How much of the living room space can shannon cover with the circular rugs to the nearest square foot? ( use PI = 3.14)
Solution
We can create the following plot:
Part 1
From this case we can see in the figure that the maxium number of circular rugs are 6
The total area is given by:
A= 12ft * 18 ft= 216 ft2
And the area for a single rug is:
\(A=\pi\cdot(3ft)^2=28.274ft^2\)Then the area for the 6 rugs is:
\(A_T=28.274\cdot6=169.646ft^2\)And rounding to the nearest square foot we got:
170 ft2
Part 2
The remaining space would be given by:
R= 216-170 ft2= 46ft
I need help with finding the ratios and rates please
please solution
this question quickly
If the standard
time is 234.15 minute and the basic time is 233.4 minute, the
allowance time is:
0.75
minute
0.57
minute
0.80
minute
The allowance time, if the standard time is 234.15 minutes and the basic time is 233.4 minutes is 0.75 minute
To calculate the allowance time, we can use the following formula:
Allowance time = Standard time - Basic time
Thus, Allowance time = 234.15 minutes - 233.4 minute = 0.75 minutes
Therefore, the allowance time is 0.75 minutes.
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there are 10 people standing equally spaced around a circle. each person knows exactly 3 of the other 9 people: the 2 people standing next to her or him, as well as the person directly across the circle. how many ways are there for the 10 people to split up into 5 pairs so that the members of each pair know each other?
there are 10 people standing equally spaced around a circle. each person knows exactly 3 of the other 9 people then there are 10 possible ways
there are 10 people standing equally spaced around a circle. each person knows exactly 3 of the other 9 people:
There is only $1$ way to do this.
Thus, in total there are $2+5+5+1={(C) }13}$ possible ways.
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Can you solve 17+4x<9
Answer:
x<-2
Step-by-step explanation:
17+4x<9
4x<-8
x<-2
The solution is:
↬ x < -2Work/explanation:
Recall that the process for solving an inequality is the same as the process for solving an equation (a linear equation in one variable).
Make sure that all constants are on the right:
\(\bf{4x < 9-17}\)
\(\bf{4x < -8}\)
Divide each side by 4:
\(\bf{x < -2}\)
Hence, x < -2A student in eight grade notices that the current cost of tuition, books, and fees at a 4 year college is $15,000 per year. The family reads that there is an annual increase of $750 per year.
What will the the total cost of tuition, books, and fees for this student when this student attends college for four years, after graduating high school?
The total cost of tuition, books, and fees for this student when attending college for four years will be $64651
Assuming that the annual increase of $750 per year is compounded each year
we can use the formula for the future value of an annuity to calculate the total cost of tuition, books, and fees for the four years:
\(FV = PMT \frac{((1 + r)^n - 1)}{r}\)
In this case, PMT = $15,000, r = 750/15000 = 0.05, and n = 4.
Plugging in these values, we get:
Total cost or FV = $15,000 x ((1 + 0.05)⁴ - 1) / 0.05
FV = $15,000 x(1.2155)-1)/0.05
FV = $15,000 x 0.2155/0.05
FV = $15,000 x4.31
FV = $64651
Hence, the total cost of tuition, books, and fees for this student when attending college for four years will be $64651
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How can you find f(3) if f(x) = -2x^2 – 4?
Square 3, multiply -2 and subtract -4 from the result. Therefore, option C is the correct answer.
The given function is f(x) = -2x²-4.
What is the function?Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.
Substitute x=3 in f(x) = -2x²-4, we get
f(3) = -2(3)²-4
Square 3, multiply -2 and subtract -4 from the result. that is
f(3) = -2×9-4
= -22
Square 3, multiply -2 and subtract -4 from the result. Therefore, option C is the correct answer.
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Use the z-score formula, x-μ Z = -, and the information below to find the mean, 0 μ. Round your answer to one decimal place, if necessary. z = 2.25, x = 22.2, and = 1.6
The mean is 18.6.
Given the following information; z = 2.25, x = 22.2, and σ = 1.6, to find the mean, we have to apply the formula for z-score. z = (x - μ)/σWhere; z-score is represented by z, the value of X is represented by x, the mean is represented by μ and the standard deviation is represented by σSubstituting the values into the equation above;2.25 = (22.2 - μ)/1.6Multiplying both sides of the equation by 1.6, we have;1.6(2.25) = (22.2 - μ)3.6 = 22.2 - μ Subtracting 22.2 from both sides of the equation;3.6 - 22.2 = - μ-18.6 = - μ Multiplying both sides of the equation by -1, we have;μ = 18.6
Simply said, a z-score, also known as a standard score, informs you of how far a data point is from the mean. Technically speaking, however, it's a measurement of how many standard deviations a raw score is from or above the population mean.
You can plot a z-score on a normal distribution curve. Z-scores range from -3 standard deviations, which would fall to the extreme left of the normal distribution curve, to +3 standard deviations, which would fall to the far right. You must be aware of the mean and population standard deviation in order to use a z-score.
The z-score can show you how that person's weight compares to the mean weight of the general population.
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Which statement about numbers is true?
Answer:
number 1 is correct
Step-by-step explanation:
All rational numbers can NOT be integers
integer do not include decimals or fraction while 0.25 is rational it can not be counted as a integer as it is a decimal.
all of the rational numbers are NOT whole numbers because again whole numbers don't include decimals
and all integers are not whole numbers as whole numbers don't include negatives so number 1 is the only logical answer
give me brainliest pls
the distance time graph represents a journey made by jo at the speed was jo walking for the first 15 minutes
The speed that Jo walked for the first 15 minutes is; 6 km/hr
How to Interpret Distance Time Graphs?The distance - time graph is missing and so i have attached it.
Now, the formula for speed is;
Speed = Distance/time
The distance after 15 minutes from the graph is 1.5km.
Now, 15 minutes when converted to hours is 15/60 = ¹/₄ hr
Thus, the speed that Jo walked for the first 15 minutes is;
Speed = 1.5/(¹/₄)
Speed = 6 km/hr
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Newton and Descartes have a $50.00 gift card to a pet store.
Newton's total is $18.95 and Descartes's total is $24.38. How much
money do they have left on their gift card?
Five cupcakes and two cookies cost $19.75. Two cupcakes
and four cookies cost $ 17.50.
How much does a cupcake cost?
How much does a cookie cost?
Cupcake: $
Cookie: $
Answer:
4.375 dollars per cookie and 2.2 dollars per cupcake
Step-by-step explanation:
hope this helps
What additional information is required in order to know that the triangles are
congruent by HL?
Answer:
Option D
Step-by-step explanation:
In ΔHBC and ΔACB,
Statements Reasons
1). CB ≅ CB (leg) 1). Reflexive property
2). BA ≅ CH (Hypotenuse) 2). Additional information for the
congruence of two right triangles by HL
property.
3). ΔHBC ≅ ΔACB 3). HL property of congruence
Option D will be the correct option.
Anna's babysitter charges $4.50 per hour. anna doesn't want to pay any more than $27. which inequality represents the number of hours, h, anna can have a babysitter?
Help me with this it’s due today
Answer:
the fifth answer is the right one
What’s the anwser to this problem
Answer:
B
Step-by-step explanation:
Take his original balance (-142) and add the deposit (500) to get $358.
Hope this helps!
Answer:
B. $358
Step-by-step explanation:
the way you would get this would be to add -142+500
someone please help with these two thank you!!!! URGERT
Answer:
First:
11x +11 = 110°
11x = 110° -11
11x = 99°
x = 99/11
x = 9°
Second:
100° = 13x -4
13x = 100° + 4
13x = 104 °
x = 104/13
x = 8°
If f(x)=2x+1/x-4what is the value of f-1(3)
By concepts of functions, the inverse of the rational function f(x) = (2 · x + 1)/(x - 4) is f⁻¹(x) = (4 · x + 1)/(x - 2), whose value at being evaluated at x = 3 is equal to 13.
How to determine the value of the inverse of a function
In this question we must determine the inverse of a given function and evaluate the resulting expression at a given value. First, we apply the following substitution:
f⁻¹(x) = x
x = f(x)
x = (2 · f⁻¹(x) + 1)/(f⁻¹(x) - 4)
Then we clear f⁻¹(x) within the expression:
x · (f⁻¹(x) - 4) = 2 · f⁻¹(x) + 1
x · f⁻¹(x) - 4 · x = 2 · f⁻¹(x) + 1
x · f⁻¹(x) - 2 · f⁻¹(x) = 4 · x + 1
f⁻¹(x) · (x - 2) = 4 · x + 1
f⁻¹(x) = (4 · x + 1)/(x - 2)
Lastly, we evaluate the function at x = 3:
f⁻¹(3) = (4 · 3 + 1)/(3 - 2)
f⁻¹(3) = 13
By concepts of functions, the inverse of the rational function f(x) = (2 · x + 1)/(x - 4) is f⁻¹(x) = (4 · x + 1)/(x - 2), whose value at being evaluated at x = 3 is equal to 13.
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Math problem giving brainlist and points!!
Answer:
It would be B
Step-by-step explanation:
what is the parallel slope of 9x - 5y = 4
Answer:
-9x+5y=-4
Step-by-step explanation:
Answer:
m= 9/5
Step-by-step explanation:
Parallel lines have the same slope.
So if you can find the slope of the given line, you have the slope you want.
Change the line into the form
y=mx + c
The value of m
will be the slope of the line.
9x −4 = 5y ← to make the y term positive
y=9/5x − 4/5
m=9/5
help me please? can you please?
Answer:
C, $40
Step-by-step explanation:
Based on the pattern shown here, the employee is gaining $10 for every hour they spend working. This means that if the employee works for 4 hours, they get 4*10=$40.
As the worker gets $10 per hour
Step-by-step explanation:
For 4 hours
$10 x 4 = $40
so for working four hours the worker will get $40