If Leopold takes one part away from each of the fractions, they will not be equal anymore.
What makes fractions to be equal?Two or more fractions are said to be equal or equivalent if we simplify them and obtain the same result for both. Let's analyze the fractions given:
5/5 = 1
3/3 = 1
What happens if we remove one part away?Even when some fractions are equivalent if you modify them this will change the equivalence property, let's prove it with the fractions given:
4/5 = 0.8
2/3 = 0.66
Note: This question is incomplete; here is the missing section:
Leopold takes one part away from each. Will the fraction still be equal?
Learn more about fractions in https://brainly.com/question/10354322
#SPJ1
HELP PLEASE ASAP
Carson wants to solve this system of equations.
=2+5−6
=−1
He solves 2+5−6=0 to find the -values, and then substitutes those values into =−1 to find the -values.
Use the drop-down menus to complete the explanation of why Carson’s work cannot be used to find the solution of the system of equations.
Carson's work cannot be used to find the solution of the system of equations because
The equation x² + 5x - 6 = 0 has two solutions, but only one of them may satisfy the equation y = x - 1.
What is system of equations?
A system of equations is a set of two or more equations that need to be solved simultaneously. The solution to a system of equations is the set of values that make all the equations in the system true. Systems of equations can be solved using a variety of methods, including substitution, elimination, and graphing.
A system of equations can be represented using algebraic notation. For example, consider the following system of two linear equations in two variables x and y:
2x + 3y = 8
4x - 5y = -7
Why Carson's work cannot be used to find the solution of the system of equations ?
The equation x² + 5x - 6 = 0 has two solutions, but only one of them may satisfy the equation y = x - 1.
Substituting the x-values found from solving the quadratic equation into the equation y = x - 1 does not necessarily give the correct y-values for the corresponding x-values that satisfy both equations simultaneously.
Carson should have substituted the x-values found from solving the quadratic equation into the equation y = x² + 5x - 6 instead of y = x - 1 to find the correct y-values that satisfy both equations simultaneously.
Learn more about equations here:
https://brainly.com/question/25976025
#SPJ1
One of the legs of a right triangle measures 16 cm and the other leg measures 10 cm. Find the measure of the hypotenuse. If necessary, round to the nearest tenth.
Answer:
We can use the Pythagorean theorem to find the length of the hypotenuse:
c^2 = a^2 + b^2
where c is the length of the hypotenuse, and a and b are the lengths of the other two sides.
Plugging in the given values, we get:
c^2 = 16^2 + 10^2
c^2 = 256 + 100
c^2 = 356
Taking the square root of both sides, we get:
c = sqrt(356)
c ≈ 18.9
Therefore, the length of the hypotenuse is approximately 18.9 cm.
There are 12 cookies in a jar. If joe ate 2/3 of them and peggy ate 1/3 of them,who are more?
The person who ate more is Joe.
What are Fractions?Fractions are type of numbers which are written in the form p/q, which implies that p parts in a whole of q.
Here p, called the numerator and q, called the denominator, are real numbers.
Total number of cookies = 12
Fraction that Joe ate = 2/3
Fraction that Peggy ate = 1/3
From the fractions itself, we can say that Joe ate more since the numerator is bigger for the fraction that Joe ate.
Number of cookies that Joe ate = 2/3 × 12 = 8
Number of cookies that Peggy ate = 1/3 × 12 = 4
Hence the number of cookies is more eaten by Joe.
Learn more about Fractions here :
https://brainly.com/question/732507
#SPJ2
ABC and EDC are straight lines
AE and BD are parallel
angle ABD=125°
Angle BCD= 30°
work out the size of x
Therefore , the solution of the given problem of angles comes out to be x has a value of 150°.
An angle meaning is what?The two sides of a tilt in Euclidean geometry are actually spherical faces that divide at the centre and top of barrier. At the point where two rays meet, they might combine to form an angle. Angle is another outcome of two entities interacting. They mirror dihedral forms the most. A two-dimensional curve can be created by arranging two line beams in various configurations at their ends.
Here,
Since AE and BD are parallel, we can calculate the value of angle ABD using the alternate internal angles theorem:
=> BCD x ABD = 180
=>ABD = 150°, ABD + 30° Equals 180°.
Now, we can use the knowledge that a triangle's angles sum to 180 degrees to determine what angle AED is worth:
180° from ABD + AED + EDC is 150° from
=>AED + 180° is 180°.
=>AED = -150°
=>AED Plus BAE = 180
=> BAE + 30° = 180°
=> BAE = 150°
In order to determine the value of angle AEB, we can use the knowledge that the angles in a triangular sum to 180°:
=>AED 180° BAE AEB
=> AEB + 150° + 30° = 180°
=>AEB = 0°
.Points A, E, and B are collinear because angle AEB is 0°, and angle x equals angle ECD:
=> Angle BCD x = 180° - 30° x = 150° x = ECD = 180°
Consequently, x has a value of 150°.
To know more about angles visit:
https://brainly.com/question/14569348
#SPJ1
What is the correlation?
A.Positive Trend
B.Negative Trend
C.No Trend
If it has one, what would be the equation for line of best fit?
A. y=3x
B.y=3/4x+1
C.y=10
D.y=1/4x
The correlation here in the provided graph is a positive trend and the equation for line of best fit will be as follows:
y = 1/4x
Define correlation?Correlation is a statistical method for determining the association or relationship between two variables. To put it another way, the correlation coefficient formula facilitates the calculation of the correlation coefficient, which assesses the degree to which one variable depends on another.
The correlation coefficient is a numerical indicator of correlation. Between -1 and 1, the correlation coefficient is found. An inverse association between two variables is shown by a negative correlation coefficient. A high correlation coefficient means that the two variables directly affect one other's values. There is no association between the two variables, according to a zero-correlation coefficient.
Here in the question,
The graph shows a positive trend as its increasing upwards. The equation for the line of best fit will be y =1/4x.
To know more about correlation, visit:
https://brainly.com/question/28898177
#SPJ1
Answer this ASAP will give the brainliest answer
Given that y = 9 cm and θ = 25°, work out x rounded to 1 DP.
In response to the query, we can state that Therefore, the value of x trigonometry rounded to 1 decimal place is 19.4 cm.
what is trigonometry?The area of mathematics called trigonometry examines how triangle side lengths and angles relate to one another. The subject first came to light in the Hellenistic era, roughly in the third century BC, as a result of the use of geometry in astronomical investigations. The area of mathematics known as exact techniques deals with several trigonometric functions and possible computations using them. There are six common trigonometric functions in trigonometry. These go by the designations sine, cosine, tangent, cotangent, secant, and cosecant, respectively (csc). The study of triangle properties, particularly those of right triangles, is known as trigonometry. Consequently, studying geometry entails learning about the characteristics of all geometric shapes.
Based on the information given in the diagram, we can use trigonometry to find the value of x.
tan(θ) = opposite / adjacent
tan(25°) = y / x
x = y / tan(θ)
x = 9 / tan(25°)
x ≈ 19.4 cm (rounded to 1 decimal place)
Therefore, the value of x rounded to 1 decimal place is 19.4 cm.
To know more about trigonometry visit:
https://brainly.com/question/29002217
#SPJ1
Peter decides to invest $1,200,000 in a period annuity that earns 4.6% APR
compounded monthly for a period of 20 years. How many years will it take
Peter to earn back his initial investment?
OA. 12 years
OB. 12.5 years
O C. 13.1 years
D. 11.3 years
Answer: 7,656.46
Step-by-step explanation:
Given is the Present Value of annuity, PV = 1,200,000 dollars.Given that 4.6% APR compounded monthly i.e. r = 4.6%/12 = 0.003833Given that 20 years of investment i.e. N = 20x12 = 240It says to find monthly income from the annuity.We know the formula for Periodic Payment (when PV is known) is given as follows :-Hence, Monthly Income would be
7,656.46 dollars.
It will take Peter approximately 12.5 years to earn back his initial investment.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
For calculate the number of years it will take Peter to earn back his initial investment of $1,200,000 with an APR of 4.6% compounded monthly for a period of 20 years, we can use the formula for the future value of an annuity:
⇒ FV = P ((1+r)ⁿ - 1) / r
Where: P = Payment per period
r = Interest rate per period
n = Number of periods
We need to solve for n, so we can rearrange the formula as;
n = (log(FV × r/P + 1)) / log(1+r)
Plugging in the given values, we get:
P = $6,601.34 ($1,200,000 / (12 × 20))
r = 0.046 / 12 = 0.00383333
FV = $1,200,000
n = (log(1,200,000*0.00383333/6,601.34 + 1)) / log(1+0.00383333)
n ≈ 12.5 years
Therefore, it will take Peter approximately 12.5 years to earn back his initial investment. The answer is option B.
Learn more about the mathematical expression visit:
brainly.com/question/1859113
#SPJ5
Is it growth or decay?
A= ?
B= ?
Wat is the Equation?
The equation is y = 27(1/3)^x and the type is a decay function
How to determine the equation and the typeFrom the graph, we have the following sequence that can be used in our computation:
27, 9, 3....
The above definitions imply that we simply multiply 1/3 to the previous term to get the current term
This means that the function reduces
So, it is a decay function
For the equation, we have
y = ab^x
Where
a = y when x = 0
So, we have
y = 27(b)^x
Using the point, we have
27(b)^1 = 9
So, we have
b = 1/3
So, the equation is y = 27(1/3)^x
Read more about exponential function at
https://brainly.com/question/11464095
#SPJ1
Find the surface area of the sphere. Round your answer to the nearest hundredth .
Rounding to the nearest hundredth, the surface area of the sphere is approximately 331.81 square meters.
What is surface area ?
Surface area is the measure of the total area that the surface of an object occupies. It is a two-dimensional measurement, typically expressed in square units, such as square meters (m²) or square feet (ft²).
The surface area (A) of a sphere with diameter d is given by the formula:
A = 4π(d/2)²
where π (pi) is a mathematical constant approximately equal to 3.14.
Substituting the given value of the diameter d = 18.3m into the formula, we get:
A = 4π(18.3/2)²
A = 4π(9.15)²
A = 4π(83.7225)
A ≈ 331.81
Therefore, rounding to the nearest hundredth, the surface area of the sphere is approximately 331.81 square meters.
To know more about surface area visit :
https://brainly.com/question/16519513
#SPJ1
Which approach is easier to use when you are extending beyond two dimensions
analytical or Euclidean geometry
why?
When extending beyond two dimensions, the analytical approach is generally easier to use than Euclidean geometry. The reason for this is that Euclidean geometry relies heavily on visualizing geometric shapes and their properties in three dimensions or higher, which can be difficult for most people.
In contrast, the analytical approach uses algebraic equations to describe geometric shapes and their properties, which can be more straightforward and intuitive for many individuals. The analytical approach also allows for the use of software tools to manipulate and visualize shapes in higher dimensions, which can be particularly useful for complex calculations and designs.
To learn more about Euclidean geometry refer to:
brainly.com/question/13104788
#SPJ4
2 * 2 * 2 * 2 + 20 * 5 + 15 = ?
Answer:131
Step-by-step explanation:
2 * 2 * 2 * 2 + 20 * 5 + 15 = 2^4+100+15=16+115=131
Answer:
131
Step-by-step explanation:
2 * 2 * 2 * 2 + 20 * 5 + 15 = (remember PEMDAS)
16 + 100 + 15 =
131
if f(x)=2x²+3 and g(x)=x²-7 find (f+g)(x)
Answer: (f+g)(x) = 3x^2-4
In Evan's white gold wedding ring, the ratio of nickel to gold is 3 to 13. If the ring contains 4. 16 oz of gold, how much nickel does it contain?
The wedding ring contains a total of 18 oz (3.32 oz nickel and 14.68 oz gold) and the weight of nickel in the ring is 3.32 oz.
To solve this problem, we need to first find the total weight of the wedding ring. We know that the ratio of nickel to gold in the ring is 3:13, which means that the total ratio of nickel and gold in the ring is 3 + 13 = 16.
Since we are given that the ring contains 4.16 oz of gold, we can use this information to find the total weight of the ring. To do this, we can use a proportion:
Gold weight / Total weight = Gold ratio / Total ratio
Plugging in the values we know, we get:
4.16 / Total weight = 13 / 16
Simplifying this equation, we can cross-multiply to get:
13(Total weight) = 4.16 * 16
Solving for Total weight, we get:
Total weight = 3.32 oz of nickel and 14.68 oz of gold.
Now we can find the weight of nickel in the ring by subtracting the weight of gold from the total weight:
Weight of nickel = Total weight - Weight of gold
Weight of nickel = 3.32 - 0
Weight of nickel = 3.32 oz
Therefore, the ring contains 3.32 oz of nickel.
To learn more about ratio click on,
https://brainly.com/question/27117082
#SPJ4
A fair coin is tossed 12 times. Which of the following outcomes (i, ii, iii, or iv) is most likely?
(i) H T H T H T H T H T H T
(ii) H T T H H T T H T H H T
(iii) H H H H H H H H H H H H
(iv) T T T H T H H H H T H H
A. (i) because there are an equal number of heads and tails.
B. (ii) because there are an equal number of heads and tails but in a random order
C. (iii) because heads are just as likely as tails
D. (iv) because you won’t necessarily get the same number of heads and tails with a fair coin
E. They are all equally likely.
Answer:
I want to say that it is E
Step-by-step explanation:
Well in terms of probability there is a 50% chance the coin will land heads and a 50% chance the coin will land tails. Since probability isn't definite you can never really get a precise number of each side. the most you could do is predict/guess
The most likely outcome is: E. They are all equally likely.
Each individual toss of a fair coin has an equal probability of being a heads or tails, regardless of what the previous tosses were. Therefore, all of the outcomes listed are equally likely. The order in which the heads and tails occur does not affect the probability of the overall outcome.
So, even though (i) has an equal number of heads and tails in an alternating pattern and (iii) has all heads, they are both equally likely to occur. The same goes for (ii) and (iv), which have an equal number of heads and tails but in a random order.
Therefore, The most likely outcome is: E. They are all equally likely.
To know more about outcomes refer here:
https://brainly.com/question/30882384#
#SPJ11
i need too find the missing side lengths does anyone know the answer!
Answer:
Step-by-step explanation:
[tex]sin45=\frac{x}{4}[/tex] [tex](sin=\frac{opposite}{hypotenuse})[/tex]
[tex]x=4sin45[/tex]
[tex]=\frac{4}{\sqrt{2}}[/tex]
[tex]=\frac{4}{\sqrt{2}}\times\frac{\sqrt{2}}{\sqrt{2}}[/tex]
[tex]=\frac{4\sqrt{2} }{2}[/tex]
[tex]=2\sqrt{2}[/tex]
[tex]cos45=\frac{y}{4}[/tex] [tex](cos=\frac{adjacent}{hypotenuse})[/tex]
[tex]y=4cos45[/tex]
[tex]=\frac{4}{\sqrt{2}}[/tex]
[tex]=2\sqrt{2}[/tex]
The dimensions of a rectangular prism are 1.5 feet by 6 feet, by 2 feet. What is the volume of the rectangular prism? Pls need help
The calculated value of the volume of the rectangular prism is 18 cubic feet.
What is the volume of the rectangular prism?From the question, we have the following parameters that can be used in our computation:
The dimensions of a rectangular prism are 1.5 feet by 6 feet, by 2 fee
The volume of a rectangular prism is given by the formula:
V = l x w x h
where l, w, and h are the length, width, and height of the prism, respectively.
In this case, the length is 1.5 feet, the width is 6 feet, and the height is 2 feet.
Therefore, the volume is:
V = 1.5 ft x 6 ft x 2 ft
V = 18 cubic feet
So the volume of the rectangular prism is 18 cubic feet.
Read more about volume at
https://brainly.com/question/1972490
#SPJ1
1.Find the order of the ARIMA process a. ARIMA(2, 1, 3) b.ARIMA(2, 0, 3) c.ARIMA(3, 0, 2) d.ARIMA(3, 1, 2) e.ARIMA (3,3,0) 2. If a relationship between two variables is called statistically significant, it means the investigators think the variables are: a.related in the sample due to chance alone. b.not related in the population represented by the sample. c.None of the above d.related in the population represented by the sample. e.very important.
If a relationship between two variables is considered statistically significant, it indicates that the variables are related in the population represented by the sample.
The order of the ARIMA process:a. ARIMA(2, 1, 3) has an order of 6b. ARIMA(2, 0, 3) has an order of 5c. ARIMA(3, 0, 2) has an order of 5d. ARIMA(3, 1, 2) has an order of 6e. ARIMA (3,3,0) has an order of 3Therefore, the order of the ARIMA process for each of the given values is: ARIMA(2,1,3) is 6, ARIMA(2,0,3) is 5, ARIMA(3,0,2) is 5, ARIMA(3,1,2) is 6, and ARIMA (3,3,0) is 3.2. If a relationship between two variables is called statistically significant, it means the investigators think the variables are related in the population represented by the sample.The correct option is d. related in the population represented by the sample.Statistical significance indicates that there is a very low probability that a pattern in the data appeared by chance, rather than a real relationship between the variables. Therefore, if a relationship between two variables is considered statistically significant, it indicates that the variables are related in the population represented by the sample.
Learn more about ARIMA process
brainly.com/question/29515380
#SPJ11
The website for company A recieves 8 x 10^6 visitor per year The website for company B receives 4x 10^3 visitors per year
determine how many times more visitors per year the website company A recieves than the company B
Company A's website receives 2,000 times more visitors per year than company B's website.
To determine how many times more visitors per year the website company A receives than company B, we need to find the ratio of the number of visitors to each website. The number of visitors to company A's website is 8 x 10^6, and the number of visitors to company B's website is 4 x 10^3.
Hence, the ratio of the number of visitors to the two websites is:
8 x 10^6 / 4 x 10^3
Simplifying this expression, we can cancel out a factor of 4 x 10^3 from both the numerator and the denominator:
8 x 10^6 / 4 x 10^3 = 2 x 10^3
Therefore, company A's website receives 2 x 10^3 times more visitors per year than company B's website. This means that for every visitor that company B's website receives, company A's website receives 2,000 visitors.
To learn more about ratios click on,
https://brainly.com/question/30259631
#SPJ4
What mixed number is equal to 15/8
Answer:
1 7/8
Step-by-step explanation:
Sorry if this is wrong <3
The circumference of the hub cap of a tire is 77. 93 centimeters. Find the area of this hub cap. Use 3. 14 for pi. Use pencil and paper. If the circumference of the hub cap were smaller, explain how this would change the area of the hub cap. PLEASE HELP IT'S DUE IN 1 HOUR
Parallelogram Property 4 The diagonals of a parallelogram bisect each other. Show Mel Given: Parallelogram CURE with diagonals bar (CR) and bar (UE) Prove bar (CR) and bar (UE) bisect each other. Proo
Therefore , the solution of the given problem of parallelograms comes out to be C and R are equally distanced from point N, the midpoint of UE and RN Equals NC.
How do parallelograms function?In Euclidean mathematics, a simple quadrilateral of two sets of equal distances is referred to as a parallelogram. In a specific kind of quadrilateral known as a parallelogram, both set of opposite sides are straight and equal. There are four types of parallelograms, 3 of which are each mutually exclusive. Rhombuses, parallelograms, squares, but also rectangles are the four distinct shapes.
Here,
We must demonstrate that OM = MR in order to establish that O is CR's middle.
=> CO / OU Equals RC / UE
This solution can be rearranged to account for RC:
=> RC Equals UE * (CO / OU)
But we also understand that OU = CO (since they are diagonals of the same parallelogram). Therefore:
=> RC = UE
This indicates that point M, the CR's centre, is equally spaced from C and U. Or put another way, OM Equals MU.
To demonstrate that O is also the midpoint of UE, we can use a similar argument.
Triangles CRU and EUC are comparable to one another (by AA resemblance), so we have:
=> UE/CR equals UC/CR
To solve for UE, rearrange this equation as follows:
=> UE = UC
As a result, C and R are equally distanced from point N, the midpoint of UE. That is to say, RN Equals NC.
To know more about parallelograms visit:
https://brainly.com/question/29147156
#SPJ1
(a) find the slope of the line and (b) interpret the slope.
for every 5-unit change in x, the change in y is ? units
The slope of the line would be 0.4.
For every 5-unit change in x, the change in y is 2 units.
How to find the slope of a line ?The slope of a line is a measure of how steeply it rises or falls. It is the ratio of the change in the vertical direction (y) to the change in the horizontal direction (x) between any two points on the line.
The slope of a line can be found by the formula :
= ( Y2 - Y1 ) / ( X 2 - X1)
= ( 2 - 0 ) / ( 5 - 0 )
= 2 / 5
= 0. 4
This is for every 1 unit change in x. For a 5 unit change in x, the change in y is:
= 0. 4 x 5
= 2 units
Find out more on slope at https://brainly.com/question/16949303
#SPJ1
Jason is wanting to rent a hot air balloon for the afternoon and has a couple options to choose from.
Balloons-R-Us charges a one-time fee of $65 plus $32 per hour. Sky Balloons charges $26 per hour plus an $83 one-time fee.
After how many hours would the companies have the same total cost?
A. 2 hours
B. 3 hours
C. 4 hours
Answer:
3 hours.
Step-by-step explanation:
You can write the equations 65+32x=83+26x, then solve.
The mean weight of 32 students is 98.3 lb. If the students could all stand on the scale together, what would their total weight be?
The mean weight of 32 students is 98.3 lb. The total weight of 32 students would be 3145.6 lb.
To find the total weight of 32 students, we need to multiply the mean weight of each student by the number of students. In this case, the mean weight of each student is 98.3 lb.
So, to find the total weight, we can use the formula:
Total weight = Mean weight × Number of students
Total weight = 98.3 lb × 32
Total weight = 3145.6 lb
Therefore, the total weight of 32 students would be 3145.6 lb.
It's important to note that the mean weight is the average weight of the 32 students. It is calculated by adding up the weight of each student and then dividing by the total number of students. So, if the weights of the students are evenly distributed, then the mean weight is a good estimate of the total weight. However, if the weights are not evenly distributed, then the total weight may be slightly different.
Overall, it's important to use statistical measures such as mean, median, and mode to gain insights into data and make informed decisions.
To learn more about mean:
brainly.com/question/31101410
#SPJ4
According to an article in Travel & Leisure, an average plot of land in Spain’s San Martin wine-producing region yields 600 bottles of wine each year.10 Assume this average is based on a random sample of 25 plots and that the sample standard deviation is 100 bottles. Give a 95% confidence interval for the population average number of bottles per plot.
We can say with 95% confidence that the true average number of bottles per plot in Spain’s San Martin wine-producing region is between 400 and 800 bottles.
The average is worth how much?Calculated by adding up all the numbers and dividing the result by the total number of figures supplied, the average is the middle value of the provided data set. A lot of data can be displayed using the average value, which is a numerical value.
For a confidence interval around the population mean, we can use the following formula:
CI = x + z*(σ/√n)
Where: x=600 bottles, sample mean
Standard deviation for the population (unknown)
25 is the sample size, while 1.96 is the critical number for a 95% confidence interval (from the standard normal distribution table)
We apply the formula: to determine the margin of error.
ME = z*(σ/√n)
With the sample standard deviation (s) and the following formula, we can find the population standard deviation ():
s = σ/√n
σ = s*√n
= 100*25 is 500 bottles.
When we enter all values into the calculation for the confidence interval, we obtain:
CI = 600 + 1.96*(500/√25)
CI = 600 + 1.96*100
CI = (400, 800) (400, 800)
The true average number of bottles per plot in Spain's San Martin wine-producing region is therefore between 400 and 800 bottles, and we can assert this with 95% confidence.
To know more about Average visit:
brainly.com/question/27193544
#SPJ1
The complete question is
According to an article in Travel & Leisure, an average plot of land in Spain’s San Martin wine-producing region yields 600 bottles of wine each year.10 Assume this average is based on a random sample of 25 plots and that the sample standard deviation is 100 bottles. Give a 95% confidence interval for the population average number of bottles per plot.
Jeremy has 5.902 kg of trail mix, bought 0.890 kg more and was given 1.5 kg. How
A random sample of 120 students at a certain high school was asked if they spend more than 4 hours a night on homework. Assume the true proportion of students that spend more than 4 hours a night on homework is 15%, which of the following is closest to the probability that more than 25 students in a sample of 120 students would respond that they spend more than 4 hours a night on homework? * 0.9632 O 0.0368 0.3236 0.6764 None of these
The probability that more than 25 students in a sample of 120 students would respond that they spend more than 4 hours a night on homework is given as follows:
0.0367 = 3.67%.
How to obtain probabilities using the normal distribution?The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.Using the z-score table, the p-value associated with the calculated z-score is found, and it represents the percentile of the measure X in the distribution.By the Central Limit Theorem, for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1 - p)}{n}}[/tex], as long as [tex]np \geq 10[/tex] and [tex]n(1 - p) \geq 10[/tex].The estimate and the sample size for this problem are given as follows:
p = 0.15, n = 120.
Hence the standard error is of:
s = sqrt(0.15 x 0.85/120)
s = 0.0326.
More than 25 students is a sample proportion above 25/120 = 0.2083, hence the probability is one subtracted by the p-value of Z when X = 0.2083, hence:
Z = (0.2083 - 0.15)/0.0326
Z = 1.79
Z = 1.79 has a p-value of 0.9633.
Hence:
1 - 0.9633 = 0.0367 = 3.67%.
More can be learned about the normal distribution at https://brainly.com/question/25800303
#SPJ1
simplify and find the value of 3(a square +5ab) -5a squared - 12ab , a = 2 & b = 3
Answer:
10
Step-by-step explanation:
Given [tex]3(a^{2} +5ab) -5a^{2} -12ab[/tex]
Substitute the values:
[tex]3((2)^{2} +5 * 2 * 3) - 5 (2)^{2} - 12(2)(3)[/tex]
3(4+30) - 5(4) - 12x6
3(34) - 20 - 72
102 - 92
= 10
One Solution
8x – 2 – 5x + 7 =
✓X+
Y
The solution to the equation 8x - 2 - 5x + 7 = 0 is x = 15/3. This equation can be solved by using the distributive property and combining like terms.
What is distributive property?Distributive Property is a mathematical property that allows the distribution of a multiplication operation over an addition or subtraction operation. It states that the multiplication of a sum by a number is equal to the sum of each addend multiplied by that number. This property is used to simplify equations and break down complex problems into easier ones. It can be expressed as a(b + c) = ab + ac.
8x - 2 - 5x + 7 = 0
This equation can be solved by using the distributive property and combining like terms. The distributive property states that when we multiply a number by a sum or difference of two or more numbers, we can distribute the number to each individual number and then add or subtract the results.
In this equation, we can apply the distributive property to the left side of the equation by multiplying the 8x and -5x terms by the sum of -2 and 7. This gives us the equation 8x(-2 + 7) - 5x(2 + 7) = 0.
After distributing the terms, we can then combine like terms by adding the 8x and -5x terms together. This gives us the equation 3x(-2 + 7) = 0.
Finally, we can solve for x by setting the coefficient of x equal to zero. Therefore, 3(-2 + 7) = 0, or -6 + 21 = 0. Rearranging the equation gives us x = 15/3.
Therefore, the solution to the equation 8x - 2 - 5x + 7 = 0 is x = 15/3.
For more questions related to multiplication
https://brainly.com/question/3901911
#SPJ9
Because both distributions, visualization (V) and no visualization (NV), are skewed, the psychologists conducted a simulation to test for a difference in medians rather than means. For each trial of the simulation, the 20 values of the total number of attempts observed in the experiment were combined into one group and then randomly split into two groups of 10. The difference in the medians (V-NV) of the groups was calculated for each trial. The following dotplot shows the difference in the medians for 100 trials of the simulation. Using the observed difference in medians (V−NV) and the results of the simulation, estimate a p-value for a test for the difference in medians. Show the work needed to calculate this p-value
We can compare the observed difference in medians between the V and NV groups to the difference in medians generated from the simulation in order to estimate a p-value for a test for the difference in medians.
We can count the number of simulation trials where the median difference is larger than or equal to the observed median difference in order to determine the p-value (V-NV). Assume that the median difference that was recorded is 5 (V-NV = 5).
Just a small number of trials, as shown by the dotplot, have median differences higher than or equal to 5. These trials can be counted manually or with software like R or Python. Say we discover 4 trials where the median difference is higher than or equal to 5.
The p-value is then determined as the percentage of simulation trials in which the median difference is larger than or equal to the observed median difference. The p-value in this instance is 4/100 = 0.04. As a result, since the p-value is lower than the significance level, we may say that the observed difference in medians is statistically significant at the 0.05 level.
Learn more about medians here:
https://brainly.com/question/28060453
#SPJ4