The function f(x) = (x + 1)^2 / (x - 2)(x + 2), with f(x) = 1.
The function f(x) is given as f(x) = (x^2 + 2x + 1) / (x^2 - 4). To determine f(x) and f(x), we must first factor the numerator and denominator. We can factor the numerator as (x + 1)^2, and the denominator as (x - 2)(x + 2). Thus, f(x) = (x + 1)^2 / (x - 2)(x + 2).
To determine the horizontal asymptotes, we must divide the leading terms of the numerator and denominator. The leading terms are x^2 for the numerator and x^2 for the denominator, so the horizontal asymptotes are y = 1.
Therefore, we can conclude that the function f(x) = (x + 1)^2 / (x - 2)(x + 2), with f(x) = 1.
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A skate board originally costs 40$ and is on sale for 10% off. The discount may be figured as which off the following?
Ps can be more than one
A) 40➗ 0.10
B) 40 x 0.10
C) 40x 1/10
D) 40➗10
Find the aving plan balance after 3 year with an APR of 7% and monthly payment of $250. 00
The Balance i $_____
The Balance is $9,405.14 in the savings plan balance.
The savings plan balance after 3 years with an APR of 7% and monthly payment of $250.00.
A savings account balance is what?
The amount of money you have available in your checking or savings account is known as your account balance in the world of banking. The net amount remaining in your account after all deposits and credits have been balanced against any charges and debits is your account balance.
FV =250 x ((1 + 0.03/12)^(3*12) - 1 / (0.03/12))
FV =250 x ((1.0025)^36 - 1 / (0.0025))
FV =250 x 37.62056031
FV =$9,405.14
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the expected cell count in a table should be larger than _______ when using chiχ2.
a) 15
b) 10
c) 2
d) 3
When using chi2, the expected cell count in a table should be larger than 10.
Chi2 analysis is a statistical function used to compare the observed frequency of an event to the expected frequency.
The ideal minimum value for the expected cell count is 10, although a value of 15 is even better. This is because the chi2 function assumes that the data is normally distributed and has a minimum number of expected occurrences.
The lower the expected cell count, the less reliable the results of the chi2 analysis will be. In fact, if the expected cell count is below 5, the results should not be considered trustworthy at all.
The degree of freedom determines the level of significance in the results, which is an important factor in interpreting the results of a chi2 analysis. In general, the larger the expected cell count, the more reliable the results will be.
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What percent of 1/4 is 2/3? PLSSS HELLPPP QUICKLY!!! TYYTYTY
Answer: 266.666667%
Step-by-step explanation:
I got that after i worked it out
Answer:
Step-by-step explanation:
Help I don’t know what to do
The rhombus have the meeting of the side length CD to be equal to 15.
What is a rhombusA rhombus is a two-dimensional geometric shape with four equal sides and four equal angles, but the angles are not necessarily 90 degrees. It is a type of parallelogram.
Since all the sides of the rhombus are equal, then;
AD = AB = CD
4x - 9 = 2x + 3 = CD
we can solve for x as follows:
4x - 9 = 2x + 3
4x - 2x = 9 + 3 {collect like terms}
2x = 12
x = 12/2 {divide through by 2}
x = 6
so;
AD = 4(6) - 9
AD = 15.
Therefore, the rhombus have the meeting of the side length CD to be equal to 15.
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Ms. Rumble's history class conducted interviews with their grandparents for a class project. The grandparents less than 89 years old knew that Amelia Earhart was
to fly solo across the Atlantic Ocean.
Determine the graph to represent this scenario.
83
83
83
83
84
84
84
85
85
85
85
86
86
86
86
87
87
87
87
88
88
88
88
89
89
89
90
90
90
90
91
91
91
91
92
92
92
92
93
93
93
93
94
24
94
2
95
95
95
95
The graph created to represent this scenario is a histogram.
What is graph?Graph is a data structure composed of nodes (vertices) connected by edges, which represent a relationship between the two nodes. Graphs are used to represent networks of communication, data organization, and even abstract concepts like thoughts or ideas. The nodes in a graph are often represented by circles and the edges by lines, but other shapes and symbols are also used. Graphs are a powerful tool for organizing and understanding data, and can be used to solve complex problems.
The x-axis represents the ages of the grandparents and the y-axis represents the number of people who fall into those age categories. The data is plotted in a bar graph format with the bars extending upward to represent the number of individuals in each age group. The highest bar is for those aged 83-84, with four people in this age range. The next highest bar is for those aged 85-86, with four people in this age range as well. The bars continue to descend in height as the age categories increase, with the lowest bar representing those aged 99-100, with four people in this age range as well.
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Consider the set of all possible five-card poker hands dealt fairly from a standard deck of fifty-two cards.
How many atomic events are there in the joint probability distribution (i.e., how many five-card hands are there)?
Total atomic events or count = 2598960
Now, According to the question:
A joint probability distribution represents a probability distribution for two or more random variables. Instead of events being labelled A and B, the condition is to use X and Y as given below. f(x, y) = P(X = x, Y = y) The main purpose of this is to look for a relationship between two variables.
In a deck of cards there are 52 cards having 4 different suits each having 13 different ranks.
In a joint probability distribution of 5 cards hand from a 52 deck of cards is calculated as shown below:
Total atomic events or count = ⁵²C₅
= 52!/5! * (52-5)!
= 52!/5! * 47!
= (48 x 49 x 50 x 51 x 52)/5!
= 311875200/120
= 2598960
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consider the following. (give your answers to four decimal places. enter your answers as a comma-separated list.) y = x2 − 3x − 7
The x-intercepts are approximately x = 1.305, 5.695. These are the x-coordinates where the parabolic function crosses the x-axis.
What is parabola?
A parabolic function is a type of mathematical function that describes a parabolic curve or parabola. A parabola is a U-shaped curve that is symmetrical about its axis of symmetry.
The equation y = x^2 - 3x - 7 represents a parabolic function with its vertex located at (-3/2, -7). To find the x-coordinates of the x-intercepts (also known as the roots or zeros), we need to solve the equation x^2 - 3x - 7 = 0. This can be done using various methods, such as the quadratic formula or factoring.
Using the quadratic formula, the x-intercepts can be found as follows:
x = (-b ± √(b^2 - 4ac)) / 2a
where a = 1, b = -3, c = -7, and √ represents the square root symbol.
So,
x = (-(-3) ± √((-3)^2 - 4(1)(-7))) / 2(1)
x = (3 ± √(9 + 28)) / 2
x = (3 ± √37) / 2
Hence, the x-intercepts are approximately x = 1.305, 5.695. These are the x-coordinates where the parabolic function crosses the x-axis.
So the answer to the question is:
1.305, 5.695
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How do you use index notation?
The dot product of two vectors u and v can be represented using index notation as u_i v_i.
What is Index notation?A mathematical language called index notation is used to describe the components of a vector or tensor. It consists of an element's position in the vector or tensor and a symbol, typically a Latin or Greek letter.
A mathematical language called index notation is used to describe the components of a vector or tensor. The element's position in the vector or tensor is indicated by a symbol (often a Latin or Greek letter) with an integer subscript. How to utilise index notation is as follows:
Vectors can be represented by a single letter with a subscript, such as v i, where I stands for the element's position in the vector.
Tensors are multidimensional arrays that can be described using an index notation for each element. For instance, T i,j can be used to represent the element in a matrix's ith row and jth column.
Executing operations: Index notation can be used to express operations like matrix multiplication and the vector dot product. For instance, u_i v_i can be used to denote the dot product of the two vectors u and v.
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indicate whether the statement is true or false. (a) z ⊂ r (b) z ⊆ r (c) z ⊆ r (d) n ⊂ r (e) z ⊂ n
a) z ⊂ r - True
b) z ⊆ r - True
c) z ⊆ r - True
d) n ⊂ r - True
e) z ⊂ n - False
What is the subset?
A subset is a set of elements that are contained within another set. The elements of the subset are referred to as its members or elements, and the set that contains the subset is called the superset.
In mathematical notation, if A is a subset of B, it is written as A ⊆ B. If A is not a subset of B, it is written as A ⊈ B.
Given the definitions:
z = {...-3,-2,-1,0,1,2,3,...} - The set of all integers.
n = {1,2,3,4, ...} - The set of all positive integers.
r = set of real numbers - The set of all real numbers (positive, negative, and zero).
(a) z ⊂ r - True. The set of integers is a subset of the set of real numbers.
(b) z ⊆ r - True. The set of integers is a subset of the set of real numbers.
(c) z ⊆ r - True. This is the same statement as in (b).
(d) n ⊂ r - True. The set of positive integers is a proper subset of the set of real numbers.
(e) z ⊂ n - False. The set of integers is not a subset of the set of positive integers.
Hence,
a) z ⊂ r - True
b) z ⊆ r - True
c) z ⊆ r - True
d) n ⊂ r - True
e) z ⊂ n - False
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Can you draw an object with a diameter of 10 inches and a circumference of 50 inches? Explain.
This question is in savvas
a group contains 11 republicans and 15 democrats. a committee of size seven is to be selected from the group. how many different committees are possible? how many different committees contain only republicans? 3. find the probability a randomly selected committee contains only republicans (round your final answer to four decimal places how many different committees contain 4 republicans and 3 democrats find the probability at a committee contains 4 republicans and 3 democrats. (round your final answer to four decimal places ) find the probability a randomly selected committee contains at least one democrat: (round your final answer to four decimal places )
The number of ways to choose only republicans is 330. The number of ways to choose the committee consisting of 1 republican and 6 democrats is 5005. The number of ways to choose the committee consisting of 1 republican and 6 democrats is 55055.
The formula for this is ⁿCm is n!/((n-m)!*m!).
The number of ways to choose only republicans = ¹¹C₇ = 330
The number of ways to choose one republicans = ¹¹C₁ = 11!/((11–1)!*1!) = 11
The number of ways to choose six democrats is ¹⁵C₆ = 15!/((15–6)!*6!) = 5005.
The number of ways to choose the committee consisting of 1 republican and 6 democrats from 15 Democrats and 11 Republican is :
¹¹C₁ * ¹⁵C₆ = 11!/((11–1)!*1!) * 15!/((15–6)!*6!) = 11 * 5005 = 55055
There are 55055 possible committees consisting of 1 republican and 6 democrats.
The number of ways to choose four republicans = ¹¹C₄ = 11!/((11–4)!*4!) = 330
The number of ways to choose three democrats is ¹⁵C₃ = 15!/((15–3)!*3!) = 455
The number ow ways to choose the committee consisting of 4 republican and 3 democrats from 15 Democrats and 11 Republican is : ¹¹C₄ * ¹⁵C₃ = 330 * 455 = 150150
There are 150150 possible committees consisting of 4 republican and 3 democrats.
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A car wash how to make their so blast six days if they only have 1/9 of a gallon of soap how much should they use each day so it lasts six days
They should use 1/45 of a gallon of soap out of 1/9 each day, so it lasts six days.
What is division?The division in mathematics is one kind of operation. In this process, we split the expressions or numbers into the same number of parts.
Given:
They have 1/9 of a gallon of soap.
To find the amount of soap so that it can last six days:
Divide the total amount of soap by the total number of days.
That means,
= 1/9 ÷ 6
= 1/9 x 1/6
= 1/ 45
Therefore, 1/45 is the required value.
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What is the sum of the infinite geometric series? (2 points) 16 - 12 + 9 - 27/4+...
The sum of the infinite geometric series is 64/7.
What is Geometric Progression?Geometric progression is a sequence of numbers such that the ratio of two consecutive numbers is the same for whole sequence.
This ratio is common ratio.
Geometric series is the sum of the numbers in the geometric progression.
Sum of an infinite geometric series can be found by the formula,
S = a / (1 - r)
where a is the first term and r is the common ratio.
Given series is 16 - 12 + 9 - 27/4 + ...
a = 16
r = -12 / 16 = -3/4
S = 16 / (1 - -3/4)
= 16 / (1 + 3/4)
= 16 / (7/4)
= 64/7
Hence the required sum is 64/7.
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Find the equation of the plane passing through the points (1,−1,2) and (2,−2,2) and which is perpendicular to the plane 6x−2y+2z=9
The equation of plane will be x+y-2z=4.
Write about a plane.
A plane in geometry can go on forever in two dimensions. The absence of width. An illustration of coordinate geometry is a plane. The coordinates of a point in a plane determine its position.
In mathematics, a plane is a two-dimensional, flat surface that never ends. A plane is a two-dimensional equivalent that includes three spatial dimensions, a line, and a point. In some higher-dimensional environments, planes can resemble subspaces, as though the room's walls had been greatly extended. These walls possess a distinct existence all their own, just as in the framework of Euclidean geometry.
The equation of plane can be used to represent a plane surface in three dimensions. There are numerous methods that can be used to find the equation for a plane depending on the input values given. The equation for the plane can be expressed in either cartesian form or vector form.
Hence, the general form of the equation is A(x−x1)+B(y−y1)+C(z−z1)=0
Now,
The solution is provided in image.
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a sports advertising website gives a poll on whether people would rather win tickets to see a baseball, football, hockey, soccer, or basketball game. the table below shows 20 responses. ticket preferences football football soccer baseball soccer football hockey baseball basketball helpcopy to clipboarddownload csv use excel to create a relative frequency distribution for the data. what is the relative frequency of the preference being soccer?
We have the table for the relative frequency below: Class Relative Frequency; Football 0.133 ; Basketball 0.267 ; Soccer 0.233 ; Baseball 0.133 ; Hockey 0.233
An array has a subscript zero for its first element. When using built-in array types, array bounds are not checked.
soccer and hockey is the correct answer because in both of these games there is a possibility of a match to be tied if both teams score equal no of goals in the given time. Both games have two halves of play, and the team scoring more goal in the given time wins but sometimes both teams score an equal number of goals then the match is tied
Class Frequency
Football 4
Basketball 8
Soccer 7
Baseball 4
Hockey 7
Total frequency = 4 + 8 + 7 + 4 + 7 = 30
Let's find the relative frequency.
To find the relative frequency, we have:
Relative frequency = frequency/total frequency
We have:
Football = [tex]\frac{4}{30}[/tex] = 0.133
Basketball = 8/30 = 0.267
Soccer = 7/30 = 0.233
Baseball = 4/30 = 0.133
Hockey = 7/30 = 0.233
Therefore,
We have the table for the relative frequency below: Class Relative Frequency; Football 0.133 ; Basketball 0.267 ; Soccer 0.233 ; Baseball 0.133 ; Hockey 0.233
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We have the table for the relative frequency below: Class Relative Frequency; Football 0.133 ; Basketball 0.267 ; Soccer 0.233 ; Baseball 0.133 ; Hockey 0.233
An array has a subscript zero for its first element. When using built-in array types, array bounds are not checked.
soccer and hockey is the correct answer because in both of these games there is a possibility of a match to be tied if both teams score equal no of goals in the given time. Both games have two halves of play, and the team scoring more goal in the given time wins but sometimes both teams score an equal number of goals then the match is tied
Class Frequency
Football 4
Basketball 8
Soccer 7
Baseball 4
Hockey 7
Total frequency = 4 + 8 + 7 + 4 + 7 = 30
Let's find the relative frequency.
To find the relative frequency, we have:
Relative frequency = frequency/total frequency
We have:
Football =4/30 = 0.133
Basketball = 8/30 = 0.267
Soccer = 7/30 = 0.233
Baseball = 4/30 = 0.133
Hockey = 7/30 = 0.233
Therefore,
We have the table for the relative frequency below: Class Relative Frequency; Football 0.133 ; Basketball 0.267 ; Soccer 0.233 ; Baseball 0.133 ; Hockey 0.233
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if h(x)=∫sin2x−π4csc(t4 1)ⅆt for −π4≤x≤π4, then h′(x)=
The derivatives of h(x) is h'(x) = √2 csc ([tex]x^4[/tex] + 1).
We have,
To find h'(x), we need to take the derivative of h(x) with respect to x using the Fundamental Theorem of Calculus.
Given that h(x) = ∫sin(2x - π/4) csc([tex]x^4[/tex] + 1) dt, we can rewrite it as:
h(x) = ∫[a, x] sin(2t - π/4) csc([tex]t^4[/tex] + 1) dt
Now, we'll apply the Fundamental Theorem of Calculus:
h'(x) = d/dx [∫[a, x] sin(2t - π/4) csc([tex]t^4[/tex] + 1) dt]
Using the Leibniz integral rule, we have:
h'(x) = sin(2x - π/4) csc([tex]x^4[/tex] + 1) - sin(2a - π/4) csc([tex]a^4[/tex] + 1)
However, we need to evaluate this derivative at x = π/4 and x = -π/4, so we substitute these values in:
h'(π/4) = sin(2(π/4) - π/4) csc((π/4)^4 + 1) - sin(2a - π/4) csc([tex]a^4[/tex] + 1)
h'(-π/4) = sin(2(-π/4) - π/4) csc((-π/4)^4 + 1) - sin(2a - π/4) csc(a^4 + 1)
Since the derivative is evaluated at the endpoints, the term with sin(2a - π/4) cancels out in both expressions.
Therefore, the derivative simplifies to:
h'(x) = sin(π/4) csc([tex]x^4[/tex] + 1) - sin(-π/4) csc([tex]x^4[/tex] + 1)
simplifying further:
h'(x) = (√2/2) csc([tex]x^4[/tex] + 1) + (√2/2) csc([tex]x^4[/tex] + 1)
Combining like terms, we have:
h'(x) = (√2/2) (csc([tex]x^4[/tex] + 1) + csc([tex]x^4[/tex] + 1))
h'(x) = (√2/2) (2csc([tex]x^4[/tex] + 1))
Finally, simplifying:
h'(x) = √2 csc([tex]x^4[/tex] + 1)
Therefore,
The derivatives of h(x) is h'(x) = √2 csc([tex]x^4[/tex] + 1).
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The complete question:
If h(x) = ∫sin 2x − π/4 csc (x^4 - 1) dt for −π/4 ≤ x ≤ π/4, then h′(x)?
a report from the illinois department of wildlife indicates that when a car and deer collide, there are 40 deer fatalities per 100 collisions. in 300 collisions between a car and a deer, what is the expected number of fatalities and that standard deviation?
In 300 collisions between a car and a deer, there are 40 deer fatalities per 100 collisions is = 1.72.
Mean = 3 Standard Deviation = 1.72.
The standard deviation measures the spread of the data about the mean value. It is useful in comparing sets of data which may have the same mean but a different range.
Standard deviation is the measure of dispersion of a set of data from its mean. It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater is the standard deviation and greater will be the magnitude of the deviation of the value from their mean.
In 300 collisions between a car and a deer, there are 40 deer fatalities per 100 collisions is = 1.72.
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In 300 collisions between a car and a deer, there are 40 deer fatalities per 100 collisions is = 1.72.
Mean = 3 Standard Deviation = 1.72.
The standard deviation measures the spread of the data about the mean value. It is useful in comparing sets of data that may have the same mean but a different range.
Standard deviation is the measure of the dispersion of a set of data from its mean. It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater the standard deviation and the greater will be the magnitude of the deviation of the value from their mean.
In 300 collisions between a car and a deer, there are 40 deer fatalities per 100 collisions is = 1.72.
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Anyone with a very strong knowledge of vectors in mathematics??
Answer:
yes, Send me your questions
an object moves from location d to location f on a trajectory (dotted line) in the direction indicated; arrows representing the velocities at locations d, e, and f are also indicated.
The object is moving in a straight line from location d to location f. The velocity of the object at each location is indicated by the arrows and is increasing from location d to location e, then decreasing from location e to location f.
The object is moving in a straight line from location d to location f, indicated by the dotted line. The velocity of the object at each location is indicated by the arrows. At location d, the arrow is pointing in the direction of the movement and has a smaller magnitude than the arrows at locations e and f. This indicates that the velocity of the object is increasing from location d to location e. At location e, the arrow has the largest magnitude and is pointing in the same direction as the dotted line. This indicates that the velocity of the object is at a peak at location e. From location e to location f, the arrow is pointing in the opposite direction of the dotted line and has a magnitude that is smaller than the arrow at location e. This indicates that the velocity of the object is decreasing from location e to location f.
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Is nitrogen trigonal pyramidal?
The Nitrogen is commonly considered as a Trigonal Pyramidal molecule .
In a Trigonal Pyramidal arrangement, there are three atoms attached to the central atom at the corners of a triangular plane, with the fourth atom attached above or below the plane.
This molecular geometry is commonly observed in compounds where the central atom has five valence electrons, such as nitrogen in its most common oxidation state of +3.
The Nitrogen in this oxidation state forms compounds like nitrogen triiodide (NI₃) and nitrogen trioxide (NO₃), which have a trigonal pyramidal geometry.
Therefore , Yes , Nitrogen is trigonal pyramidal .
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consider the cardiod r=1 sintheta determine the values wehre teh curve has a horizontal and vertical tangents
So, if the curve has a horizontal tangent, the values are = k, where k is an integer, and where the curve has a vertical tangent, the values are = (2k + 1)/2, where k is an integer.
What is cardiod?A cardiod is a curve defined by the equation r = 1 + cos(θ), where r is the radial coordinate and θ is the angular coordinate. The equation can be re-written as r = 1 + cos(θ) = 1 + 2cos^2(θ/2) for 0 <= θ <= 2π. A curve has a horizontal tangent when its derivative with respect to θ is equal to zero, which means the slope of the tangent line is 0. The derivative of r with respect to θ is dr/dθ = -sin(θ). Thus, the curve has a horizontal tangent when -sin(θ) = 0, or θ = kπ, where k is an integer.
Here,
A curve has a vertical tangent when its second derivative with respect to θ is equal to zero, which means the rate of change of the slope is 0. The second derivative of r with respect to θ is d^2r/dθ^2 = -cos(θ). Thus, the curve has a vertical tangent when -cos(θ) = 0, or θ = (2k + 1)π/2, where k is an integer.
So, the values of θ where the curve has a horizontal tangent are θ = kπ, where k is an integer, and the values of θ where the curve has a vertical tangent are θ = (2k + 1)π/2, where k is an integer.
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Nancy and Bill collect coins. Nancy has x coins. Bill has 2 coins fewer than four times the number of coins Nancy has. Write and simplify an expression for the total number of coins Nancy and Bill have.
An expression for the total number of coins Nancy and Bill have is
5x - 2 coins.
What is a numerical expression?A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.
Given, Nancy has x coins. Bill has 2 coins fewer than four times the number of coins Nancy has.
The numerical form of the statement will be for the total number of coins they both have is,
= x + (4x - 2).
= 5x - 2 coins.
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How to Convert Cubic Feet to Cubic Yards
9 feet is equivalent to 3 total yards since 3 feet is 1 yard. 3 feet wide is equivalent to 1 yard.
How much are yards in cubic feet?9 feet is equivalent to 3 total yards since 3 feet = 1 yard. 3 feet wide is equivalent to 1 yard. The dimensions are 12 inches tall by 1 foot deep, or one-third of a yard.A cubic yard is 3 × 3 x 3, or 27 cubic feet, as a yard is 3 feet or 36 inches (ft3).Measurements in feet: Length, Width, and Depth (inches divided by 12). Divide the total sum by 27. (the amount of cubic feet in a yard). The projected number of cubic yards needed will be the final value.9 feet is equivalent to 3 total yards since 3 feet is 1 yard. 3 feet wide is equivalent to 1 yard.To learn more about Cubic Feet refer to:
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If the shear force diagram of a simply supported beam is parabolic, then the load on the beam is A
uniformly distributed load
B
concentrated load at mid span
C
external moment acting at mid span
D
linearly varying distributed load
The shear force diagram of a simply supported beam is parabolic when it is a linearly varying distributed load.
What is a shear force diagram?
A shear force diagram depicts the shear force's variation throughout the length of the beam.
Examples of internal forces that are produced in a structure when loads are applied include shear force and bending moment. Failures often result from loading in one of two ways:
A beam can be damaged either a) by being sheared across its cross section or b) by being bent excessively.
It is possible to define shear force as the algebraic sum of the loads to the left or right of a point, provided that doing so restores vertical equilibrium.
For the shear force diagram of a simply supported beam to be parabolic, then the load on the beam should be linearly varying distributed load.
The slope or load will vary linearly if the shear force diagram is parabolic.
Therefore the shear force diagram of a simply supported beam is parabolic when it is linearly varying distributed load.
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The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y.
y=
3x108
X
What is the wavelength for radio waves with frequency 3 × 109?
01x10-1 m
O 3× 10-¹ m
O3x1017
O 9x1017 m
The wavelength for radio waves with frequency 3 × 10^9 is given as follows:
3 x 10^-1 m.
How to find the numeric value of a function or of an expression?To find the numeric value of a function or of an expression, we replace each instance of the variable in the function or in the expression by the value at which we want to find the numeric value.
The function for this problem is defined as follows:
y = (3 x 10^8)/x.
The wavelength for radio waves with frequency x = 3 × 10^9 is given as follows:
y = (3 x 10^8)/(3 x 10^9).
y = 3 x 10^(-1).
(keep the base and subtract the exponents).
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Anissa asked a group of students to choose their favorite type of lunch from the choices of pizza, burger, and sandwich. The results of the survey are shown on the graph.
Based on the graph, how many students in a class of 360 students would be expected to choose pizza or sandwich as their favorite type of lunch?
The number of students in a class of 360 students who would be expected to choose pizza or a sandwich as their favorite type of lunch will be 280. Then the correct option is C.
What is the expected value?In parameter estimation, the expected value is an application of the weighted sum. Informally, the expected value is the simple average of a considerable number of individually determined outcomes of a randomly picked variable.
The expected value is given below.
E(x) = np
Where n is the number of samples and p is the probability.
The probability who choose pizza or a sandwich as their favorite type of lunch will be given as,
p = (30 + 40) / (30 + 20 + 40)
p = 70 / 90
p = 7 / 9
Then the expected value is given as,
E(x) = 360 x (7/9)
E(x) = 280
The number of students in a class of 360 students who would be expected to choose pizza or a sandwich as their favorite type of lunch will be 280. Then the correct option is C.
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8. Three solutions contain a certain acid. Solution A contains 15% acid.
Solution B contains 5% acid, and Solution C contains 40% acid. A chemist
combined all three solutions to create a 60-liter mixture containing 29%
acid. If twice as much of Solution C as Solution A was used, how many
liters of each solution was used for the mixture?
The 7.5 liters of Solution A, 52.5 liters of Solution B, and 15 liters of Solution C were used to create the 60-liter mixture containing 29% acid.
Three solutions contain a certain acid.
Solution A contains 15% acid.Solution B contains 5% acid.Solution C contains 40% acid.A chemist combined all three solutions to create a 60-liter mixture containing 29% acid.
A mixture is a material composed of two or more simpler substances in chemistry. Such materials can be compounds or chemical elements.Let's call the amount of Solution A used in liters as x. Then, the amount of Solution B used would be (60 - x) liters and the amount of Solution C used would be 2x liters.
The total amount of acid in the mixture is the sum of the acid in each solution, so we can write an equation to represent the final concentration of acid in the mixture:(0.15 * x) + (0.05 * (60 - x)) + (0.40 * 2x) = 0.29 * 60
Expanding and simplifying the equation, we get:
⇒0.30x + 3 - 0.05x + 2.4x = 17.4
Solving for x, we find that x = 7.5 liters of Solution A was used.
So, 7.5 liters of Solution A, 52.5 liters of Solution B, and 15 liters of Solution C were used to create the 60-liter mixture containing 29% acid.
Therefore, the 7.5 liters of Solution A, 52.5 liters of Solution B, and 15 liters of Solution C.
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the set of all objects of interest is called a. event b. survey c. sample d. population e. experiment
The set of all objects of interest is called population.
What do you mean of population?Any whole group that shares at least one trait is referred to be a population. People do not make up all populations. Populations can include, but are not limited to, individuals, animals, organisations, structures, buildings, cars, farms, objects, or occasions.The term "population" refers to all citizens who are either permanently residing in a country or who are just passing through. This indicator reveals how many people typically reside in a certain area. Growth rates are the population changes that occur each year as a result of births, deaths, and net migration.Age-sex distributions can be used to generate three different types of population pyramids: expanding, constrictive, and stationary.
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I need to know the expressions to the correction location on the model
The given expression (5x² + 25x + 20) / 7x is equivalent to the expression [(x² + 2x + 1) / (x - 1)] × [(5x² + 15x - 20) / (7x² + 7x)].
What is an expression?
Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.
The given expression is - (5x² + 25x + 20) / 7x
The other two expression are -
(x² + 2x + 1) / (7x² + 7x)
Let the unknown expression be x.
So according to the question -
(x² + 2x + 1) / (7x² + 7x) × x = (5x² + 25x + 20) / 7x
Cross multiply the polynomials -
x = [(5x² + 25x + 20) / 7x] × [(7x² + 7x) / (x² + 2x + 1)]
Here, it can be seen that (x² + 2x + 1) is the expansion of (x + 1)² and (7x² + 7x) = 7x (x + 1).
Substitute these values into the equation -
x = [(5x² + 25x + 20) / 7x] × [7x (x + 1) / (x + 1)²]
Simplify the equation -
x = (5x² + 25x + 20) / (x + 1)
Here, it can be seen that (5x² + 25x + 20) is the expansion of 5 (x + 4) (x + 1).
Substitute these value into the equation -
x = 5 (x + 4) (x + 1) / (x + 1)
Simplify the equation -
x = 5 (x + 4)
Multiply the numerator and denominator by (x - 1) -
x = 5 (x + 4) (x - 1) / (x - 1)
x = 5x + 20 (x - 1) / (x - 1)
x = 5x² - 5x + 20x - 20 / (x - 1)
x = 5x² + 15x - 20 / (x - 1)
So the unknown expression is 5x² + 15x - 20 / (x - 1).
Verify by substituting -
[(x² + 2x + 1) / (x - 1)] × [(5x² + 15x - 20) / (7x² + 7x)]
Here, it can be seen that (x² + 2x + 1) is the expansion of (x + 1)² and (7x² + 7x) = 7x (x + 1).
Substitute these values into the equation -
[(x + 1)² / (x - 1)] × [5 (x + 4) (x - 1) / 7x (x + 1)]
5 (x + 4) (x + 1) / 7x
Simplify the equation -
5x + 20 (x + 1) / 7x
5x² + 5x + 20x + 20 / 7x
5x² + 25x + 20 / 7x
This expression is equivalent to the original expression.
Therefore, the unknown expressions are (5x² + 15x - 20) and (x - 1).
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