There are 13,225 different ways to select a committee of size 3 from a group of 15 people, where one person will be president, one will be vice president, and one will be treasurer.
To calculate this, we can use a combination formula. The formula for combinations is nCr = n! / (r! * (n - r)!), where n is the size of the group and r is the number of people in the committee.
In this case, n = 15 and r = 3.
Using this formula, we can calculate that there are 15! / (3! * (15 - 3)!) = 13,225 different ways to select a committee of size 3 from a group of 15 people, where one person will be president, one will be vice president, and one will be treasurer.
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jasmin is 5 feet tall and is standing in the light of a 15 feet lamppost. her shadow is 4 feet long. if she walks 1 feet farther away from the lamppost,by how much longer will her shadow lengthen?
Jasmin, who is 5 feet tall, is standing in the 15-foot lamppost's light. Her shadow is 4 feet long. If she walks 1 feet farther away from the lamppost, her shadow will lengthen by 3/2 feet.
Let ‘x’ be the distance between Jasmin and the base of the lamppost when she is casting a 4-foot shadow. We can use similar triangles to set up a proportion:
15/x = 5/4
Solving for 'x', we get:
X = 15/3
X = 5 feet
This means that Jasmin is standing 5 feet away from the base of the lamppost when she is casting a 4-foot shadow.
Now, let’s find the distance between Jasmin and the base of the lamppost when she walks 1 foot farther away. This will be ‘5+1=6’ feet.
Again, we can use similar triangles to set up a proportion:
15/6 = y/4+z
Where 'y' is the length of Jasmin’s shadow when she is 6 feet away from the lamppost, and 'z' is the additional length of her shadow.
Simplifying this proportion, we get:
Y = 5/2 + 5z/6
We want to find ‘z’, the additional length of Jasmin’s shadow. We can do this by using the fact that when Jasmin is 6 feet away from the lamppost, her shadow is 4+z feet long. Setting up an equation using this information, we get:
4+z=y
Substituting the expression for ‘y’ from the proportion we set up earlier, we get:
4+z = 5/2 + 5z/6
Solving for 'z', we get:
Z = 3/2
Therefore, Jasmin’s shadow will lengthen by 3/2 feet when she walks 1 foot farther away from the lamppost.
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What percentage of people would exed to score higher than a 2.5, but lower than 3.5? The mean: X=3.00 The SDis= + 0.500 18% 999 o 50% 03%
Therefore, approximately 68.26% of people are expected to score higher than 2.5 but lower than 3.5.
Based on the information provided, the mean (X) is 3.00 and the standard deviation (SD) is 0.50. To find the percentage of people expected to score higher than 2.5 but lower than 3.5, we will use the standard normal distribution (z-score) table.
First, we need to calculate the z-scores for both 2.5 and 3.5:
z1 =[tex] (2.5 - 3.00) / 0.50 = -1.0[/tex]
z2 = [tex](3.5 - 3.00) / 0.50 = 1.0[/tex]
Now, we can use the standard normal distribution table to find the probability of the z-scores. For z1 = -1.0, the probability is 0.1587 (15.87%). For z2 = 1.0, the probability is 0.8413 (84.13%).
To find the percentage of people expected to score between 2.5 and 3.5, subtract the probability of z1 from the probability of z2:
Percentage = [tex](0.8413 - 0.1587) x 100 = 68.26%[/tex]
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Which relationships describe angles 1 and 2?
Select each correct answer.
adjacent angles
complementary angles
vertical angles
supplementary angles
Answer:
1+2=90° .so complementary angle
Can someone please help me with this question????????
The area of the walkaway is 216.66 feet squared.
How to find the area of a circular figure?The circular swimming pool has a diameter of 20 feet. A 3 foot tile walkaway is being installed around the pool.
Therefore, the area of the walkaway can be calculated as follows:
Hence,
area of the walkaway = area of the bigger circle - area of the smaller circle
area of the bigger circle = πr²
area of the bigger circle = 3.14 × 13²
area of the bigger circle = 530.66
area of the smaller circle = πr²
area of the smaller circle = 3.14 × 10²
area of the smaller circle = 314
area of the walkaway = 530.66 - 314 = 216.66 ft²
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Solve the attached CLT question
Thanks!!
The weight of the cylinder when it is full, in grams, given the volume and radius, can be found to be d. 240, 000, 000πg.
How to find the weight of the cylinder?To find the weight of the cylinder when it's full, we need to first find the volume of the cylinder and then multiply it by the density of the fluid.
The formula for the volume of a cylinder is V = πr²h, where r is the radius and h is the height.
V = π(400 cm)²(1000 cm)
V = π(160000 cm²)(1000 cm)
V = 160000000π cm³
Then, find the mass of the fluid inside the cylinder:
Mass = Density × Volume
Mass = 1.5 g/cm³ × 160000000π cm³
Mass = 240,000,000π g
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In right triangle XYZ, ∠Y is the right angle and m∠X = 60°. If YZ = 4, what is XY?
Answer:
We can use trigonometry to solve this problem. In a right triangle, the sine, cosine, and tangent ratios relate the side lengths of the triangle to the angles.
Since we know that angle X is 60 degrees, we can use the sine ratio to find the length of side XY:
sin(60°) = XY / YZ
Simplifying this expression, we get:
sqrt(3) / 2 = XY / 4
Multiplying both sides by 4, we get:
XY = 2sqrt(3)
Therefore, XY is equal to 2 times the square root of 3.
Find the surface area of the solid. Round your answer to the nearest tenth
if necessary.
Area of the solid composite shape with triangle and rectangle is =832cm².
Define area of composite shapes?The area of a composite shape can be determined by adding or subtracting its component pieces.
Hence, we can use two formulas:
Area of Composite Shape + Area of Composite Shape + Area of Basic Shape A (additive)
Basic Shape Area A, Basic Shape Area B, and Composite Shape Area (subtractive)
In the figure,
Dimensions of the triangle are height, h = 16cm and base, b = 12cm.
Area = 1/2 ×b ×h
= 1/2 × 16× 12
=96cm²
There are two triangles, so the total area = 96+ 96 = 192cm².
Now area of the rectangle = length × width
= 20 × 32
= 640cm².
Total area of the solid= 192 + 640 = 832cm².
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Help please, If A= 3x^2+5x-6 and B= -2x^2-6+7, then A-B equals
A-B is equivalent to 5x2 + 11x - 13 as a result as [tex]A = 3x^2 + 5x - 6[/tex] and [tex]B = -2x^2 - 6x + 7[/tex] .
what is expression ?A mathematical expression is a grouping of digits, variables, operators, and symbols that denotes a mathematical amount or relationship. It can be analyzed or condensed using mathematical operations and rules, and it can be a single word or a group of terms. Numerous mathematical ideas, including equations, variables, functions, and formulas, can be represented by expressions. Standard form, factored form, extended form, and polynomial form are just a few of the different ways they can be expressed in writing.
given
We must deduct the expression B from the expression A in order to obtain A-B. To accomplish this, we subtract the appropriate coefficients from terms of the same degree. Here are the facts:
[tex]A = 3x^2 + 5x - 6\\B = -2x^2 - 6x + 7[/tex]
A - B =[tex](3x^2 + 5x - 6) (-2x^2 - 6x + 7)[/tex]
= 3x2 + (5x - 6) + (2x2 - 6) + (7x - 5x2 + 11x - 13 (distributing the negative sign)
A-B is equivalent to 5x2 + 11x - 13 as a result as [tex]A = 3x^2 + 5x - 6[/tex] and [tex]B = -2x^2 - 6x + 7[/tex] .
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Mrs Ndlovu invests 5 200 into a savings account which offers an interest rate of 5,5% per annum compounded annually.How much will Mrs Ndlovu have in her account at the end of 9 years
After a time period of 9 years Mr. Lucas' investment will be 17940 x 10^5
What does investment mean in everyday language?
A purchase made with the intention of earning money or gaining notoriety is referred to as an investment. The acquisition of things that are not used right away but will be utilized to create wealth down the road is known as an investment in an economic perspective. There are numerous investment options available.
Rate in percentage (R) = 5.5%
Principal Amount (P) = 5 200
Total time period (t) = 9 years
Number of times interest is compounded per t (n) = 1
r = R/100
r = 5.5/100
r = 0.055 rate per year,
Then solve the equation for A
A = P(1 + r/n)^(nt)
A = 5200(1 + 0.055/1)⁽¹⁾⁽⁹⁾
A = 5200(1 + 0.055)⁹
A = 5200(1.055)⁹
A = 5200 * 3.45 x 10^5
= 17940 x 10^5
Hence, after a time period of 9 years Mr. Lucas' investment will be 17940 x 10^5
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Projective personality tests are most widely used by which psychological perspective?
Projective personality tests are most widely used by the Psychodynamic perspective.
According to Sigmund Freud's theory of personality, people's personalities are shaped by their unconscious motivations and past experiences. The theory also emphasizes the role of the unconscious mind in human behavior.Projective personality tests are based on this psychodynamic theory, which posits that people's unconscious emotions, thoughts, and desires can reveal much about their personalities. The tests seek to uncover this unconscious content by asking people to interpret ambiguous stimuli.
Projective tests are more effective than self-report measures in discovering unconscious thoughts, desires, and motivations because they bypass a person's defenses. Self-report measures, on the other hand, are more susceptible to response bias or social desirability bias.There are many types of projective personality tests, including the Rorschach Inkblot Test, the Thematic Apperception Test, and the Draw-A-Person Test. Although the reliability and validity of projective tests have been debated in the psychological community, they remain popular in clinical and forensic settings today.
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The table shows the number of goals made by two hockey players.
Player A Player B
1, 4, 5, 1, 2, 4, 5, 5, 11 1, 2, 1, 3, 2, 3, 4, 1, 8
Find the best measure of variability for the data and determine which player was more consistent.
Player A is the most consistent, with a range of 10.
Player B is the most consistent, with a range of 7.
Player A is the most consistent, with an IQR of 3.5.
Player B is the most consistent, with an IQR of 2.5.
After answering the presented question, we can conclude that With an IQR of [tex]2.5[/tex] , Player B is the most consistent. Thus, option D is correct.
What is equation?The IQR is a more robust measure of variability that is less vulnerable to outliers or extreme results. It is the difference between the dataset's 75th percentile (Q3) and 25th percentile (Q1). Player A has an IQR of [tex]5-2.5 = 2.5[/tex] , while Player B has an IQR of [tex]3-1.5 = 1.5[/tex] .
Based on these calculations, we can see that Player A has a wider range, suggesting more variability in the data, but Player B has a narrower range and IQR, indicating less variability and higher consistency in the data. As a result, the right answer is:
Therefore, With an IQR of [tex]2.5[/tex] , Player B is the most consistent.
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When comparing two group means, the _____ refers to the number of scores free to vary once the means are known. A. null hypothesis B. research hypothesis C. statistical significance D. degree of freedom
When comparing two group means, the degree of freedom refers to the number of scores free to vary once the means are known. Correct option is D.
What is the degree of freedom?The degree of freedom (df) is the number of independent pieces of information available in a study that may be used to estimate the value of the population parameter in question.
In layman's terms, the degree of freedom is the number of independent pieces of information that can be used to calculate a population parameter estimate in a statistical study. The degree of freedom (df) refers to the number of scores free to vary once the means are known.
This implies that there are a certain number of scores (or values) in the study that can be changed freely without affecting the mean of the study's scores. For instance, if the study's mean score is 75, the degree of freedom is the number of scores that may be adjusted without altering the mean score of 75.
As a result, the degree of freedom represents the number of values that can be varied to get a given statistic, such as the mean.
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a rectangular prism has a length of 6 cm, a width of 3 cm, and a height of 412cm. the prism is filled with cubes that have edge lengths of 12 cm. how many cubes are needed to fill the rectangular prism?
The dimensions of a rectangular prism are 6 cm long, 3 cm wide, and 4 ½ cm tall. 648 cubes are required to completely fill the rectangular prism.
The formula for calculating the rectangular prism's volume is:
Volume = Length x Width x Height
Substituting the given values, we get:
Volume = 6 cm x 3 cm x 4 ½ cm
Volume = 81 cm³
Since the cubes have an edge length of ½ cm, their volume is:
Volume of one cube = (1/2 cm)³ = 1/8 cm³
To find the number of cubes needed to fill the rectangular prism, we can divide the volume of the prism by the volume of one cube:
Number of cubes = Volume of prism / Volume of one cube
Substituting the values, we get:
Number of cubes = 81 cm³ / (1/8 cm³)
Number of cubes = 81 cm³ x 8
Number of cubes = 648
Therefore, 648 cubes are needed to fill the rectangular prism.
The complete Question is:-
A rectangular prism has a length of 6 cm, a width of 3 cm, and a height of 4 1/2cm. the prism is filled with cubes that have edge lengths of ½ cm. how many cubes are needed to fill the rectangular prism?
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Solve and graph the inequality.
-4 < 4x < 20
The solution of the given inequality is x ∈ (-1,5). The graph has been plotted and attached below.
What is an inequality?
In mathematics, an inequality is a relationship that unfairly compares two numbers or other mathematical expressions. Size comparisons between two numbers on the number line are most usually made.
We are given an inequality as -4 < 4x < 20.
Now, on splitting the inequality, we get two inequalities which are:
-4 < 4x and 4x < 20.
On solving -4 < 4x, we get
⇒ -4 < 4x
⇒ -1 < x
Similarly, on solving 4x < 20, we get
⇒ 4x < 20
⇒ x < 5
So, we get -1 < x < 5 which means x ∈ (-1,5).
The graph of the inequality has been plotted and attached below.
The red part represents -1 < x and the blue part represents x < 5.
Hence, the solution of the given inequality is x ∈ (-1,5).
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One - third a decreased by 2
Six times a number divided by 3.
Eight more than a number n squared.
Twice the difference of
8 and a number.
9 more than the quotient of
14 and a number n.
The sum of 15 and twice m.
Four more than twice a number y is 72.
One - half a number x is 6 less than the number.
4 times the sum of a number n and 7 is 16.
PLEASE SOMEONE HELP ME PUT THESE IN ALGEBRAIC EXPRESSIONS I WILL LOVE YOU FOREVER
The algebraic expressions for each statement is given below:
The Algebraic StatementsHere are the algebraic expressions for the given statements:
One-third a decreased by 2: (1/3)a - 2
Six times a number divided by 3: (6b)/3 = 2b
Eight more than a number n squared: n^2 + 8
Twice the difference of 8 and a number: 2(8 - c) = 16 - 2c
9 more than the quotient of 14 and a number n: (14/n) + 9
The sum of 15 and twice m: 15 + 2m
Four more than twice a number y is 72: 2y + 4 = 72
One-half a number x is 6 less than the number: (1/2)x = x - 6
4 times the sum of a number n and 7 is 16: 4(n + 7) = 16
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Helppppppppppppppppp
Answer:No
Step-by-step explanation:
What is the least common multiple if 12 and 9?
To find the least common multiple (LCM) of 12 and 9, we can list their multiples and find the smallest multiple they have in common:
Multiples of 12: 12, 24, 36, 48, 60, ...
Multiples of 9: 9, 18, 27, 36, 45, 54, 63, ...
We can see that the smallest multiple they have in common is 36. Therefore, the LCM of 12 and 9 is 36.
Alternatively, we can use the prime factorization method to find the LCM:
Prime factorization of 12: 2^2 x 3
Prime factorization of 9: 3^2
To find the LCM, we need to take the highest power of each prime factor that appears in either number. In this case, the highest power of 2 is 2^2, and the highest power of 3 is 3^2. Therefore, the LCM of 12 and 9 is 2^2 x 3^2 = 36.
Answer:
The least common multiple of 12 and 9 is 36.
Step-by-step explanation:
The multiples of 12 are: 12, 24, 36, 48, 60, ...
The multiples of 9 are: 9, 18, 27, 36, 45, 54, 63, ...
The least common multiple is the smallest number that both lists share, which is 36.
If ΔDEF is similar to ΔPRY, what is the measure of PY?
A 12 centimeters
B 21 centimeters
C 24 centimeters
D 48 centimeters
solve x using the tangent lines
The value of x is the measure of the angle between the tangent lines with arc 46° and is equal to 134°
How to evaluate for the value of x given two tangent.Given the tangents to the circle intersecting at a point forming the angle x, the measure of the angle x between the tangents is 180 degrees minus the measure of the arc between the two points of tangency.
hence;
x = 180° - arc length
x = 180° - 46°
x = 134°
Therefore, the value of x is the measure of the angle between the tangent lines with arc 46° and is equal to 134°.
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Mattew is going on a trip to Hawaii and takes a limo to the airport. The driver says it will cost $20 plus 20 cents a mile. Mattew lives 50 miles from the airport
Matthew can travel up to 150 miles for $50, assuming the cost of the limo ride remains constant at a $20 fixed cost plus $0.20 per mile. Let's say Matthew has $50 to spend on the limo ride.
We know that the cost per mile is $0.20, so we can set up an equation:
Cost = $20 + $0.20 x Distance
We can substitute $50 for Cost and solve for Distance:
$50 = $20 + $0.20 x Distance
$30 = $0.20 x Distance
Distance = $30 / $0.20
Distance = 150 miles
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__are the most common location for a collision between a bike and a car.
A: driveways
B: left turns
C: right turns
D: parking lots
Sasha is playing a board game and rolls two dice. Let A = {the sum of the dice is odd}, and let B = {the second die shows an odd number}. Are events A and B independent?
Probability is a branch of mathematics that deals with the measurement of the likelihood of an event occurring. It is expressed as a number between 0 and 1, with 0 representing an impossible event and 1 representing a certain event.
What is the probability?The events A and B are not independent.
To see this, note that the probability of A is given by:
[tex]P(A) = 1/2[/tex] , since there are 6 ways to get an odd sum[tex](1+2, 2+1, 3+4[/tex] , [tex]4+3, 5+6, 6+5)[/tex] out of a total of 12 possible outcomes when rolling two dice.
The probability of B is also 1/2, since there are 3 odd numbers on a standard die and 6 possible outcomes for the second die.
Now, to calculate P(A ∩ B), we need to find the probability that both events A and B occur simultaneously.
This happens when we roll an odd sum (which has a 1/2 probability) and then get an odd number on the second die (which has a 1/2 probability). Multiplying these probabilities together, we get:
[tex]P(A ∩ B) = (1/2) * (1/2) = 1/4[/tex]
Finally, we can check whether the events A and B are independent by comparing P(A ∩ B) to P(A)P(B):
[tex]P(A)P(B) = (1/2) * (1/2) = 1/4[/tex]
Therefore, Since [tex]P(A ∩ B) ≠ P(A)P(B)[/tex] , we can conclude that the events A and B are not independent.
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Events A and B are not independent. Let A = {the sum of the dice is odd}, and let B = {the second die shows an odd number}.
what is probability?
Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain to happen.
The probability of two events A and B being independent is determined by whether the occurrence of one event affects the occurrence of the other. In the given problem, event A is the sum of two dice being odd, and event B is the second die showing an odd number.
The probability of A and B occurring separately can be calculated, as can the probability of A and B occurring together. While P(A ∩ B) = P(A) * P(B), the events are not independent since knowing that one event has occurred affects the probability of the other event.
If A occurs, the probability of B changes, and if B occurs, the probability of A changes.
No, because P(A∩B) = P({1,3,5})∩P({1,3,5}) = P({1,3,5}) = 1/2, and P(A)P(B) = (1/2) * (1/2) = 1/4, which are not equal.
Therefore, events A and B are not independent.
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This graph shows a proportional relationship.
What is the constant of proportionality?
Enter your answer in the box.
need help ASAP before 12 am, giving 20 points!!
The constant of proportionality is equal to 12.
What is a proportional relationship?In Mathematics, a proportional relationship is a type of relationship that produces equivalent ratios and it can be modeled or represented by the following mathematical expression:
y = kx
Where:
y represent the earnings.x represent the time.k is the constant of proportionality.In order to have a proportional relationship and equivalent ratios, the variables representing the earnings and time must have the same constant of proportionality:
Constant of proportionality, k = y/x
Constant of proportionality, k = 36/3 = 60/5 = 72/6 = 84/7
Constant of proportionality, k = 12.
Therefore, the required equation is given by:
y = kx
y = 12x
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Does anyone have the answers to Edmentum's Unit 3 Post Test: Extending to Three Dimensions?
Extending to Three Dimensions depend on the specific questions asked and can be calculated using the formula for the volume of a three-dimensional object.
The answers to Edmentum's Unit 3 Post Test: Extending to Three Dimensions depend on the specific questions asked. Generally, the test covers topics such as the definition of three-dimensional objects, the properties of three-dimensional space, and the relationships between three-dimensional figures. For example, a question might ask how to calculate the volume of a rectangular prism. To answer this, one would need to calculate the area of each of the rectangles that make up the prism and then multiply them together to get the volume. For example, if the length of the prism is 4, the width is 3, and the height is 2, the volume of the prism would be 24 (4 * 3 * 2 = 24).
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given the following frequency table of values, is the mean, median, or mode likely to be the best measure of the center for the data set? valuefrequency 351 364 376 386 395 631
For the given following frequency table of values 351, 362, 373, 381, 391, The mode is likely to be the best measure of the center for the data set.
The given frequency table is as follows:
Value frequency 351, 362, 373, 381, 391.
To find the most appropriate measure of central tendency for a dataset, we need to analyze the spread of data.
The mean, median, and mode are measures of central tendency in statistics.
We can find the following measures from the given data set:
Mean: It is calculated by summing up all the values and then dividing the result by the total number of values. This measure of central tendency is appropriate when the data are symmetrical.
Median: It is the middle value of the data set when arranged in order. It is suitable for skewed data.
Mode: It is the most common value in the data set. It is appropriate when data is discrete. The data in the frequency table appear to be discrete.
Because the data are discrete, the most appropriate measure of central tendency is the mode. So, the mode is likely to be the best measure of the center for the given value frequency data set.
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HELP PLEASE 30 POINTS NO WRONG ANSWER OR LINKS THEY WILL GET REPORTED
Answer:
the answer is the last one
A bag contains 4
blue marbles, 4
green marbles, and 2
yellow marbles. Sydney selects a marble without looking and then puts it back. If she does this 5
times, what is the best prediction possible for the number of times Sydney will pick a yellow marble?
a certain positive integer has exactly 8 factors. two of these factors are 15 and 21. what is the sum of all eight factors?
The sum of all eight factors is 96
Let's express the integer as a product of its prime factors, in the form
n = p1^a1 × p2^a2 × ... × pn^an
where p1, p2, ..., pn are prime numbers and a1, a2, ..., an are positive integers.
We know that the integer has 8 factors, which means that its prime factorization must have the form:
n = p1^2 × p2^2 × p3^4
since (2+1) × (2+1) × (4+1) = 3 × 3 × 5 = 45, which is the total number of factors for this product.
We also know that 15 and 21 are factors of the integer, so they must be expressible in terms of the prime factors of n. We can write
15 = 3 × 5 = p1 × p2
21 = 3 × 7 = p1 × p3
From these expressions, we can see that p1 = 3, p2 = 5, and p3 = 7.
Therefore, the prime factorization of n is
n = 3^2 × 5^2 × 7^4
The eight factors of n are
1, 3, 5, 7, 9, 15, 21, and 35
Their sum is
1 + 3 + 5 + 7 + 9 + 15 + 21 + 35 = 96
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the product of two consecutive positive integers is 3 less than three times their sum find the integers
The two consecutive positive integers are 5 and 6.
Let the two consecutive positive integers be x and x + 1. We are given that the product of these integers is 3 less than three times their sum. This can be expressed as:
[tex]x(x + 1) = 3(x + x + 1) - 3[/tex]
Now we can solve for x:
[tex]x^2 + x = 6x + 3 - 3[/tex]
[tex]x^2 + x = 6x[/tex]
[tex]x^2 - 5x = 0[/tex]
Factoring the left side of the equation, we get:
[tex]x(x - 5) = 0[/tex]
From this equation, x can be 0 or 5.
However, since the question asks for positive integers, we can't use x = 0. Therefore, x = 5.
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Does 3 divided by 8 = 3/8
Answer:
yes
Step-by-step explanation:
The answer to 3 divided by 8 can also be written as a mixed fraction as follows: 0 3/8 Note that the numerator in the fraction above is the remainder and the denominator is the divisor.