The required pmf is P(X=x) = [tex]\frac{\binom{28}{x}\binom{70 - 28}{10 - x}}{\binom{70}{10}}[/tex]
A probability mass function (pmf) is a function over the sample space of a discrete random variable X which gives the probability that X is equal to a certain value. Let X be a discrete random variable on a sample space S . Then the probability mass function f(x) is defined as. f(x)=P[X=x]. f ( x ) = P [ X = x ] .
as given, if 28 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation.
so,
Let X denote the number of firms that violate at least one regulation from 10 randomly selected firms out of 70 firms of which 28 violate at least one regulation.
P(X=x)
= Hyper(x; n = 10, M = 28, N = 70)
= h(x; 10, 28, 70)
= [tex]\frac{\binom{28}{x}\binom{70 - 28}{10 - x}}{\binom{70}{10}}[/tex]
Thus, the required pmf is P(X=x) = [tex]\frac{\binom{28}{x}\binom{70 - 28}{10 - x}}{\binom{70}{10}}[/tex]
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The required pmf is P(X=x) = 28Cx * (70-28)C(10-x))/70C10
A probability mass function (pmf) is a function over the sample space of a discrete random variable X which gives the probability that X is equal to a certain value. Let X be a discrete random variable on a sample space S . Then the probability mass function f(x) is defined as. f(x)=P[X=x]. f ( x ) = P [ X = x ] .
as given, if 28 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation.
so,
Let X denote the number of firms that violate at least one regulation from 10 randomly selected firms out of 70 firms of which 28 violate at least one regulation.
P(X=x)
= Hyper(x; n = 10, M = 28, N = 70)
= h(x; 10, 28, 70)
= 28Cx * (70-28)C(10-x))/70C10
Thus, the required pmf is P(X=x) = 28Cx * (70-28)C(10-x))/70C10
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when two dice are thrown, what is the probability that their numbers are different? round to the nearest hundredth.
The probability for getting the different numbers when two dice are thrown is: 5/6.
Explain the term sample space?The catalog of all potential outcomes of such an experiment is referred to as the sample space. Regardless of the number many ways an event could occur, each potential result is symbolized by a single point with in sample space. For instance, the results of the experiment using a simple fair dice throw are used to create the sample space.The sample space formed by rolling two dice are: 6*6 = 36.
Total number of pairs having same number = (1,1), (2,2),(3,3),(4,4),(5,5),(6,6) = 6 samples.
Thus,
Number of outcomes having different numbers:
36 - 6 = 30
Probability (different numbers) = total number of different number / total outcomes.
Probability (different numbers) = 30 / 36
Probability (different numbers) = 5/6
Thus, the probability for getting the different numbers when two dice are thrown is: 5/6.
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Midterm-exam scores and final-exam scores. We expect that students who do well on the midterm exam in a course will usually also do well on the final exam. Gary Smith of Pomona College looked at the exam scores of all 346 students who took his statistics class over a 10-year period The least-squares line for predicting final-exam score from midterm-exam score was
Octavio scores 10 points above the class mean on the midterm. How many points above the class mean do you predict that he will score on the final? (Hint: What is the predicted final-exam score for the class mean midterm score x?) This is an example of regression to the mean, the phenomenon that gave "regression" its name: students who do well on the midterm will, on the average, do
Aug 27 2021| 12:13 PM |
So, if Octavio scores 10 points higher than the class mean on the midterm, we may anticipate that he will score final = a + b * (x + 10) points higher on the final.
What is equation?In its most basic form, an equation is a mathematical statement that indicates that two mathematical expressions are equal. 3x + 5 = 14, for example, is an equation in which 3x + 5 and 14 are two expressions separated by a 'equal' sign.
Here,
Given the regression equation for predicting final-exam score from midterm-exam score:
final = a + b * midterm
where a and b are the regression coefficients, we can use the class mean midterm score x as a reference point to predict the final exam score for a student who scored 10 points above the class mean on the midterm.
First, we need to find the class mean midterm score, which can be represented as x:
x = mean(midterm_scores)
Next, we find the predicted final exam score for the class mean midterm score:
final = a + b * x
Finally, we find the predicted final exam score for a student who scored 10 points above the class mean midterm score:
final = a + b * (x + 10)
So, if Octavio scores 10 points above the class mean on the midterm, we can predict that he will score final = a + b * (x + 10) points above the class mean on the final.
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The weekly cost to produce x widgets is given by C(x)=15000 + 100x- 0. 00004x^3
and the demand function for the
given P(x): 200 -0. 005x
Determine the maginal revenue and maginal profit when 2500 widgets are sold and when 7500 widgets are sold assume that the company sells exactly what they produce
Marginal revenue and marginal profit when 2500 widgets are sold is $175 and $-17.5 respectively and when 7500 widgets are sold is $125 and $-207.5 respectively.
The cost function is given by:
C(x)\ =\ 15000\ +\ 100x\ -\ 0.03x^2\ +\ 0.000004x^3
The demand function is given by:
p\left(x\right)=200-0.005x
The marginal revenue and marginal profit are determined by differentiating revenue function R(x) and profit function P(x) respectively. The relationship between cost function C(x), revenue function R(x) and profit function P(x) is:
P(x)\ =\ R(x)\ -\ C(x)
The revenue function is determined by multiplying demand function p(x) and number of widgets x, hence
R(x)\ =xp(x)\ =\ x(200\ -\ 0.005x)\ =\ 200x\ -\ 0.005x^2
The profit function is given by:
P(x)\ =\ (200\ -\ 0.005x^2)\ -\ (15000\ +\ 100x\ -\ 0.03x^2\ +\ 0.000004x^3)
P(x)\ =\ -0.000004x^3\ -\ 0.025x^2\ +\ 100x\ -\ 15000
Differentiating profit function to determine marginal profit:
P\left(x\right)=-0.000004x^3-0.025x^2+100x-15000
P'(x)\ =\ -0.0000012x^2\ -\ 0.05x\ +\ 100
Differentiating revenue function to determine marginal revenue:
R(x)\ =\ 200x\ -\ 0.005^2
R'(x)\ = 200 – 0.01x
Evaluating these differentials when x = 2500 and x = 7500
P'(x)\ =\ -0.0000012x^2\ -\ 0.05x\ +\ 100
P'(2500)\ =\ -0.0000012(2500)^2\ -\ 0.05(2500)\ +\ 100\ =\ -17.5
P'(7500)\ =\ -0.0000012(7500)^2\ -\ 0.05(7500)\ +\ 100\ =\ -207.5
R'(x)\ = 200 – 0.01x
R'(2500)\ = 200 – 0.01(2500) = 175
R^\prime\left(7500\right)=200-0.01\left(7500\right)=125
Hence, marginal revenue and marginal profit when 2500 widgets are sold is $175 and $-17.5 respectively and when 7500 widgets are sold is $125 and $-207.5.
Note: The question is incomplete. The complete question probably is: Question: The weekly cost to produce x widgets is given by: C(x)\ =\ 15000\ +\ 100x\ -\ 0.03x^2\ +\ 0.000004x^3 and the demand function for the widgets is given by: p(x) = 200 - 0.005x. Determine the marginal revenue and marginal profit when 2500 widgets are sold and when 7500 widgets are sold assume that the company sells exactly what they produce.
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The first term of an A.Pis -1 and the common difference is 0.5. Find the 6th term.
Answer:
Step-by-step explanation:
-4
Work Shown:
[tex]a_1 = -1 = \text{ first term} \\\\d = 0.5 = \text{ common difference} \\\\a_n = a_1 + d(n-1)\\\\a_n = -1 + 0.5(n-1)\\\\a_6 = -1 + 0.5(6-1)\\\\a_6 = -1 + 0.5(5)\\\\a_6 = -1 + 2.5\\\\a_6 = 1.5\\\\[/tex]
A point charge with magnitude +Q is located inside the cavity of a spherical conducting shell. The shell has an inner radius equal to a, an outer radius equal to b, and holds a net charge of -3Q, as shown in the figure. What is the magnitude of the electric field inside the conducting shell, at a radial distance r where a < r < b?
Zero is the magnitude of the electric field inside the conducting shell, at a radial distance r where a < r < b.
What is electric field?Each point in space has an electric field associated with it when there is charge existing in any form. E, often known as electric field strength, electric field intensity, or just the electric field, is a mathematical constant that expresses the strength and direction of an electric field.
The electromagnetic region which surround electrically charged particles and acts to either attract or repel all those other positive ions in the field is known as an electric field (or E-field). A systems of charged particles' physical field is also referred to in this phrase.
By applying Gauss law, to the sphere of radius r with dotted lines:
∅(E) = ∫E. dA
∅(E) = E (4πr²) = Q/∈₀
E₁ = Q/4πr²∈₀
The electric field in a conductor is zero. a < r < b has an r value in the conductor.
E₂ = 0
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Given nonzero vectors u, v, and w, use dot product and cross product notation, as appropriate, to describe the following.(a) The projection of u on v.(b) A vector orthogonal to u and v.(c) A vector orthogonal to u X v and w.(d) The volume of the parallelepiped determined by u, v, and w.(e) A vector orthogonal to u X v and u X w.(f) A vector of length |u| in the direction of v.
The solution to all the components of this question are as follows:
a) The projection of u on v is given by the dot product of u and the unit vector in the direction of v, scaled by the magnitude of v:
proj(u,v) = (u . v/|v|) * v/|v|
b) A vector orthogonal to u and v can be found by taking the cross product of u and v:
u x v
c) A vector orthogonal to u X v and w can be found by taking the cross product of u X v and w:
(u x v) x w
d) The volume of the parallelepiped determined by u, v, and w is given by the magnitude of the scalar triple product of u, v, and w:
|u . (v x w)|
e) A vector orthogonal to u X v and u X w can be found by taking the cross product of u X v and u X w:
(u x v) x (u x w)
f) A vector of length |u| in the direction of v is given by the projection of u on v scaled by the magnitude of u:
|u| * proj(u,v) = |u| * (u . v/|v|) * v/|v|
Therefore, all the answers are given above.
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when using a graduated pipet, at which point do you measure the volume?
The volume is measured at the bottom of the meniscus when the liquid level is between the two etched marks on the pipet.
1. Place the graduated pipet on a flat surface and make sure it is level
2. Draw the liquid up until the meniscus is level with the etched line that corresponds to the desired volume
3. Make sure the liquid is not touching the etched line above it
4. Observe the bottom of the meniscus and take the reading at the point where the liquid level is between the two etched lines
The volume is measured at the bottom of the meniscus when the liquid level is between the two etched marks on the pipet.
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consider the sequence {12, 5, -2, -9, -16 ... } select all the items that define the sequence
Arithmetic sequence {12, 5, -2, -9, ...} defined by first term 12 and common difference -7.
What is arithmetic sequence ?
An arithmetic progression or arithmetic sequence is a sequence of numbers such that the difference from any succeeding term to its preceding term remains constant throughout the sequence.
The sequence {12, 5, -2, -9, -16 ... } can be defined by the following items:
The first term: 12
The common difference: -7
The pattern of adding the common difference to find the next term.
Therefore, all the items that define the sequence are:
The first term: 12
The common difference: -7
This sequence is an arithmetic sequence.
Arithmetic sequence {12, 5, -2, -9, ...} defined by first term 12 and common difference -7.
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evaluate the limit, if it exists. (if an answer does not exist, enter dne.) lim x → 8 12−x − 2 24−x − 4
The limit does not exist as x approaches 8 for (√(12−x) − 2)/ (√(24−x) − 4).
Therefore the answer is dne.
The square root of 12 - x approaches 2 as x approaches 8 and the square root of 24 - x approaches 4 as x approaches 8.
The limit fails to exist because both the numerator and the denominator approach 0 as x approaches 8, but the ratio of the two approaches positive infinity. This shows that the limit is undefined or "dne".
As both the numerator and denominator approach 0, the fraction they form can approach any real number or it can oscillate between two values, leading to an undefined limit. In such cases, the limit fails to exist.
--The question is not readable, answering to the question below--
"evaluate the limit, if it exists. (if an answer does not exist, enter dne.)
lim x → 8 (√(12−x) − 2)/ (√(24−x) − 4)"
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SALARY The average salary for an entry-level mechanical engineer position in Texas ranges from $63,000 to $73,500
a year.
Write a compound inequality to represent the possible monthly salary m of an entry-level mechanical engineer in Texas.
Answer:
$5,250 ≤ m ≤ $6,125
Step-by-step explanation:
A compound inequality is a mathematical statement that combines two inequality statements using "and" or "or". In this case, the compound inequality represents the range of possible monthly salary for an entry-level mechanical engineer in Texas.
The average salary for this position ranges from $63,000 to $73,500 per year. To find the monthly salary, we need to divide these amounts by 12 months, which gives us the minimum and maximum monthly salary:
$63,000/12 = $5,250
$73,500/12 = $6,125
Therefore, the compound inequality is:
$5,250 ≤ m ≤ $6,125
This means that the monthly salary of an entry-level mechanical engineer in Texas could be anywhere between $5,250 and $6,125.
what is the probability that the mean weight is less than 23 pounds
The probability of the sample mean weight is more than 3 pounds away from the 26:
P(x(bar) < 23) + P(x(bar) > 29) = 0.0030
Now, According to the question;
Sampling Distribution:
As per the central limit theorem, the sampling distribution is approximately normal if the sample is random and the sample size is at least 30, or the population from which the sample is selected, is normally distributed.
We have,
Population mean, μ = 26 pounds
Population standard deviation , σ = 3 pounds
Sample size, n = 9
P(x(bar) < 23) = 0.0015
P(x(bar) > 29) = 0.0015
The probability of the sample mean weight is more than 3 pounds away from the 26:
P(x(bar) < 23) + P(x(bar) > 29) = 0.0015 + 0.0015
= 0.0030
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The given question is incomplete, complete question is:
The weights of 1-year-old male children are fairly normal with mean 26 pounds, a standard deviation of 3 pounds. If we randomly sample nine 1-year-old boys, the probability of their sample mean weight being less than 23 pounds is 0.0015, and the probability of being greater than 29 pounds is also 0.0015. What is the probability of the sample mean weight being more than 3 pounds away from 26?
The perimeter of a rectangle is 34 units. Its width is 6.5 units.
Write an equation to determine the length (t) of the rectangle.
Find the length of the rectangle.
On solving the provided question, we can say that the equation foe the rectangle will be = 34 = 12 + 2W
What is rectangle?A rectangle in Euclidean plane geometry is a quadrilateral with four right angles. You might also describe it as follows: a quadrilateral that is equiangular, which indicates that all of its angles are equal. The parallelogram might also have a straight angle. Squares are rectangles with four equally sized sides. A quadrilateral of the shape of a rectangle has four 90-degree vertices and equal parallel sides. As a result, it is sometimes referred to as an equirectangular rectangle. Because its opposite sides are equal and parallel, a rectangle is also known as a parallelogram.
Perimeter of rectangle is = 2(L+W)
the equation foe the rectangle will be =
34 = 2(6.5 + W)
34 = 12 + 2W
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what is the probability that the digit 7 doesn’t appear among 100 digits where each digit is one of (0-9) and all sequences are equally likely?
The probability that the digit 7 doesn't appear among 100 digits is 9/10, or 90%.
The probability that the digit 7 doesn't appear among 100 digits where each digit is one of (0-9) and all sequences are equally likely is given by the probability that all 100 digits are chosen from the set {0, 1, 2, 3, 4, 5, 6, 8, 9}. There are 10 choices for each digit, so there are 10^100 possible sequences of 100 digits. The number of sequences that don't contain the digit 7 is 9^100. Therefore, the probability that the digit 7 doesn't appear among 100 digits is: P(7 doesn't appear) = (9^100) / (10^100) = 9 / 10
Therefore, the probability that the digit 7 doesn't appear among 100 digits is 9/10, or 90%.
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AXYZ was reflected over a vertical line, then dilated by a
scale factor of Ź, resulting in AX'YZ. Which must be
true of the two triangles? Select three options.
O AXYZ - AX'Y'Z'
O ZXZY - ZY'Z'X'
OYXY'X'
OXZ = 2X Z
=
OmZYXZ = 2mZY'X'Z'
The true options for the triangles are :
ΔXYZ [tex]\sim[/tex] ΔX'Y'Z'
∠XYZ ≅ ∠X'Y'Z'
XZ = 2X'Z'
What is meant by reflection and dilatation?Flipping a figure over a line is called reflection. Rotation is the process of turning a figure a specific amount around a point. Dilation is when we enlarge or reduce a figure.
A triangle can change due to reflection and dilatation.
Triangle XYZ exists reflected over a vertical line.
Then dilated by 1/2 to form X'Y'Z'
The above highlights mean that:
ΔX'Y'Z' = 1/2 × XYZ
i.e., the triangle X'Y'Z"s side lengths are half that of the original triangle XYZ.
This means that:
The triangles exists similar then option (a) exists true
The angles are congruent then option (b) exists true
The side lengths of XYZ are twice the side lengths of X'YZ' then option (d) exists true.
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Move 1 1/4 units in the negative direction from 3/4, and then plot a point at this location.
Answer:
The point you would plot would be at -1/2
Explanation:
3/4 - 1 1/4 = -1/2
John make two clay pot. Each pot i fired independently. The probability that a pot crack while being fired i 0. 03 Calculate the probability that only one of John’ pot crack while being fired
The Probability that only one of John's pot crack while being fired is 0.06.
The probability that only one of John's pots cracks while being fired can be calculated using the formula for the binomial distribution:
P(X = 1) = C(2, 1) * (0.03)^1 * (1 - 0.03)^(2 - 1)
= 2 * 0.03 * 0.97
= 0.0582
Where C(2, 1) is the number of combinations of 2 items taken 1 at a time, and (0.03)^1 and (1 - 0.03)^(2 - 1) are the probabilities of the first pot cracking and the second pot not cracking, respectively.
So, the probability that only one of John's pots cracks while being fired is approximately 0.06.
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How many liters of 20% apple cider vinegar solution must be added to 5 liters of a 5%
Gena needs to add 2.5 liters of the 20% solution. Option B is correct.
What are equation models?The equation model is defined as the model of the given situation in the form of an equation using variables and constants.
Let's call the amount of 20% solution that Gena needs to add "x". Then the total amount of solution will be 5 + x liters. The total amount of apple cider vinegar in the solution will be:
0.20x + 0.05(5 + x) = 0.10(5 + x)
Expanding the right side:
0.20x + 0.05 * 5 = 0.10 * 5 + 0.10x
Solving for x:
0.20x - 0.10x = 0.10 * 5 -0.05 * 5
0.1x = 0.25
x = 2.5
So, Gena needs to add 2.5 liters of the 20% solution. Option B is correct.
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I need help with ‘classifying polynomials; adding & subtracting polynomials’
Classifying polynomials refers to categorizing polynomials based on the degree of the polynomial and the number of terms in the polynomial.
The degree of a polynomial is the highest exponent in the polynomial. Polynomials can be classified into several types, including constant polynomials (degree 0), linear polynomials (degree 1), quadratic polynomials (degree 2), and so on. Adding and subtracting polynomials is the process of combining two or more polynomials by combining like terms. Like terms are terms with the same variable and exponent. To add or subtract polynomials, simply line up the terms with the same variable and exponent and add or subtract the coefficients. The result will be a new polynomial with the combined terms.
For example, to add the polynomials [tex]2x^2 + 3x + 4[/tex] and [tex]-x^2 + 5x - 6[/tex], we line up the terms with the same variable and exponent and add the coefficients:
[tex](2x^2 + 3x + 4) + (-x^2 + 5x - 6) = (2x^2 - x^2) + (3x + 5x) + (4 - 6) \\[/tex]
[tex]= x^2 + 8x - 2.[/tex]
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Pablo generates the function f (x) = three-halves (five-halves) superscript x minus 1 to determine the xth number in a sequence.
The equation represent to determine the [tex]x^n[/tex] number in a sequence is this function f( x+1) = 5/2 f(x). This is the equation used to determine the xth number in a sequence.
Here, these values are given,
f(x) = 3/2 [5/2] x-1 [ After putting the values of f(x)}
So,here from this ,the equation will become ,
f(x+1) = 3/2 [ 5/2] x+1-1
f(x+1) = 3/2 [5/2] x
Here, 5/2 f(x)= 5/2×3/2 [5/2] x-1
5/2 f(x) = 3/2 [5/2] x-1+1
5/2 f(x) = 3/2 [5/2] x
So, f(x+1) =[ 5/2]f (x)
So, this will be the equation for this function .
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[tex]f(x) = (3/2)^(5/2)^(x - 1)[/tex] this function can be used to calculate the xth number in the sequence for any given value of x.
f(x) is the function that will generate the xth number in the sequence.
The function is written as:
[tex]f(x) = (3/2)^(5/2)^(x - 1)[/tex]
This can be read as:
Take 3/2 (three halves) to the power of 5/2 (five halves) to the power of x minus 1.
This will generate the xth number in the sequence.
The function f(x) is used to determine the xth number in a sequence. It is written as: f(x) = [tex](3/2)^(5/2)^(x - 1)[/tex]. This means that we take the number 3/2 (three halves) and raise it to the power of 5/2 (five halves) and then to the power of x minus 1. This will generate the xth number in the sequence, where x is the position in the sequence. For instance, if x is 5, then the fifth number in the sequence will be generated using the function f(x). Therefore, this function can be used to calculate the xth number in the sequence for any given value of x.
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HELP ASAP 35 POINTS!!!
What is the slope of the line
A. -2
B. 0
C. 2
D. Undefined
The slope of the line is zero because the line is parallel to the x-axis.
What is a linear equation?A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
The slope of the line is zero because the line is parallel to the x-axis. Then the equation is given as,
y = - 2
The slope of the line is zero because the line is parallel to the x-axis.
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The Wildgrove library has 15 pop CDs and 59 other CDs.
If a library patron randomly selects one of the CDs, what is the probability that it will be a pop CD?
Write your answer as a fraction or whole number.
The probability of randomly selecting a pop CD is 15/74.
What is probability?Probability is a measure of the likelihood of a certain event occurring, expressed as a number between 0 and 1.
An event with a probability of 1 is considered certain to occur, while an event with a probability of 0 is considered impossible. Events with probabilities between 0 and 1 are considered uncertain, with higher probabilities indicating greater likelihood of occurrence.
Probability is a mathematical concept that represents the likelihood of an event occurring, expressed as a number between 0 and 1, where 0 means that the event is impossible, and 1 means that the event is certain to occur. The calculation of probability involves using rules of probability theory and statistical analysis to determine the chance of a specific outcome or set of outcomes.
There are various methods for calculating probability, including classical probability, empirical probability, and subjective probability.
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the points o(0,0,0), p(,,), and q(,,) lie at three vertices of a parallelogram. find all possible locations of the fourth vertex.
The two possible locations for the fourth vertex of the parallelogram are p and q.
The fourth vertex of a parallelogram can be obtained by adding the vector difference between two of its vertices to the third vertex. In this case, the vector difference between two vertices can be found by subtracting one vertex from the other, i.e. p-o and q-o. So, the fourth vertex can be found by adding either of these vectors to vertex o, i.e. r = p - o + o = p or r = q - o + o = q.
Therefore, the two possible locations for the fourth vertex of the parallelogram are p and q.
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Answer all theses for a surprise ⬇️
Definitely not at school rn
The proportionate equation for each problems are:
constant of proportionality: 4.75; price per unitconstant of proportionality: 8.5; times per ditance or minutes per milesy = 1.5x y = 18x 10.5 cups of water15 3/4 yards of fabricLet's discuss each problem we have:
1. Liv earns $9.50 for every 2 bracelets she sells.
y = 4.75x
because y = kx, then:
y = $9.50
x = 2
4.75 --> constant of proportionality
--> price per unit of bracelet sold
2. John ran 3 miles in 25.5 minutes
y = 8.5x
y = 25.5 minutes
x = 3 miles
8.5 --> constant of proportionality
--> minuntes per miles
--> times per distance
3. Lincoln bought 3 bottles of energy drink for $4.50
y = kx
y = $4.50
x = 3
$4.50 = k (3)
k = $1.50 --> price of a bottle of energy drink
4. Total cost of 4 hours renting a cotton candy machine is $72.
y = kx
y = $72
x = 4 hours
$72 = k(4)
k = $18 --> price of renting per hour
5. 7 cups of water are used to make 4 loaves of French bread.
y = kx
y = 7
x = 4
7 = k(4)
k = 7/4
Proportionate equation: y = 7/4 x
(x = 6)
y = 7/4 (6)
y = 21/2 = 10.5 cups of water
6. 6 3/4 yards of fabrics are used to make 3 elf costumes
y = kx
y = 6 3/4
x = 3
6 3/4 = k (3)
27/4 = 3k
--------------- x 4
27 = 12k
k = 9/4
Proportionate equation: y = 9/4 x
(x = 7)
y = 9/4 (7)
y = 63/4
y = 15 3/4 yards of fabric
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the value of a certain two digit number is 9 times the sum of its digits. it the digits are reversed, the resulting number is 63 less than the original number. find the original number
Answer:
Step-by-step explanation:
10x+y=9(x+y)
10y+x=10x+y-63
now put x alone and solve for x then y and add the values of x and y and you will get your answer
suppose f ( x ) = 3 x 2 − 4 x − 5 . compute the following: a.) f ( − 4 ) f ( 3 ) = b.) f ( − 4 ) − f ( 3 ) =
To find f ( -4 ) - f ( 3 ) we need to first evaluate both functions. To evaluate f ( -4 ) we plug -4 into the function and simplify. Now that we have both values we can subtract them to get the answer of -67.
a.) f ( -4 ) = 3 ( -4 )2 - 4 ( -4 ) - 5 = -47 f ( 3 ) = 3 ( 3 )2 - 4 ( 3 ) - 5 = 20 f ( -4 ) f ( 3 ) = -47 ( 20 ) = -940
b.) f ( -4 ) - f ( 3 ) = -47 - 20 = -67
a.) To find f ( -4 ) f ( 3 ) we need to first evaluate both functions. To evaluate f ( -4 ) we plug -4 into the function and simplify. This gives us -47. To evaluate f ( 3 ) we plug 3 into the function and simplify. This gives us 20. Now that we have both values we can multiply them together to get the answer of -940.
b.) To find f ( -4 ) - f ( 3 ) we need to first evaluate both functions. To evaluate f ( -4 ) we plug -4 into the function and simplify. This gives us -47. To evaluate f ( 3 ) we plug 3 into the function and simplify. This gives us 20. Now that we have both values we can subtract them to get the answer of -67.
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What is 3/18 written in simplest form? Explain how you found you answer.
Answer:
1/6
Step-by-step explanation:
You have to divide both the numerator and denominator by the greatest common factor to get simplest form. In this case, the gcf(Greatest Common Factor) is 3. 3/3 is 1 and 18/3 is 6
Therefore, the answer is 1/6
Based on the mass and volumes of each crown below, which crown do you think is densest?
Saturn has the densest crown based on Gizmo densities, with a density of 687 kg/m³.
What is density?The density of an item is calculated theoretically as its mass divided by its volume.
The weight of an object is defined as its mass. The volume of a thing is the amount of space that the object or substance takes up.
As a result, density refers to the ratio or numerical connection between an object's mass and the quantity of space it occupies.
Saturn is the densest planet in terms of both mass and volume. Saturn is denser than a rock, quarter, cruise ship, or beach ball, according to what we can see from the Gizmos.
See the table below for their densities.
Objects Relative Density
Rock 2.6g/cc³
Cruise Ship 9.0g/cm³
Quarter 8.9 g/ml³
Saturn 687 kg/m³
Beach ball 10 g/cc³
Thus, we selected Saturn as the Gizmo with the densest crown.
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PLEASE HELP ITS A MATH QUESTION ILL MARK BRAINLY :D
Answer:
I think its A even function
Step-by-step explanation:
Choose the best graduated cylinder to make each measurement in a single use. 36 mL of water A 50 ml graduated cylinder with markings every 10 mL 5.75 ml of a sucrose solution A 10 ml graduated cylinder with markings every 0.1 mL - 18.5 mL of a NaCl solution A 25 ml graduated cylinder with markings every 1 ml
The best-graduated cylinder to make each measurement in a single use would be:
a) 36 mL of water - A 50 ml graduated cylinder with markings every 10 mL
b) 5.75 ml of a sucrose solution - A 10 ml graduated cylinder with markings every 0.1 mL
c) 18.5 mL of a NaCl solution - A 25 ml graduated cylinder with markings every 1 ml.
A graduated cylinder is a laboratory glassware used to measure the volume of a liquid. It is a tall, narrow container with a straight cylindrical shape, marked with precise volume measurements on the side. Graduated cylinders are typically made of glass or plastic, and come in various sizes, with the most common sizes ranging from 10 mL to 2000 mL. The cylinder is calibrated to a specific volume, and the volume of a liquid can be measured by reading the scale at the bottom of the meniscus, the curved surface of the liquid. Graduated cylinders are used in a wide range of scientific applications, including chemistry, biology, and physics experiments. They are an essential tool in any laboratory setting as they allow for precise measurement of liquids, which is crucial in many experiments.
Thus, the best-graduated cylinder to make each measurement in a single use would be:
a) 36 mL of water - A 50 ml graduated cylinder with markings every 10 mL
b) 5.75 ml of a sucrose solution - A 10 ml graduated cylinder with markings every 0.1 mL
c) 18.5 mL of a NaCl solution - A 25 ml graduated cylinder with markings every 1 ml.
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A graduated cylinder is a piece of lab equipment used to gauge a liquid's volume. It is a tall, slender container with a straight cylindrical shape that is labeled on the side with exact volume measurements. Graduated cylinders can be found in a variety of sizes and are normally made of glass or plastic. The most popular sizes range from 10 mL to 2000 mL. The cylinder is calibrated to a particular volume, and the liquid's volume can be determined by looking at the scale at the base of the meniscus, the liquid's curved surface. Applications for graduated cylinders in science are numerous and include studies in physics, biology, and chemistry. They are a necessary instrument in every laboratory setting since they make it possible to measure liquids precisely, which is important for many investigations.
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the national and nutrition survey reported that 30% of adults in the u. s have hypertension (high blood pressure). let x be the number of adults in the u. s with hypertension. a sample of 25 adults is studied: calculate the following probabilities using rguroo and then fill in the blanks with your answers. a) the probability that 12 or fewer adults in the sample have hypertension is . round your answers to three decimal places. b) the probability that more than 10 adults in the sample have hypertension is . round your answers to three decimal places. c) calculate the
Probability that more than 10 adults in the sample have hypertension is 0.768
Var(X) = 5.25
The probability that more than 10 adults in the sample have hypertension is 0.6086
The National and Nutrition survey reported that 30% of adults in the U. S have hypertension (high blood pressure). Let X be the number of adults in the U. S with hypertension.
A sample of 25 adults is studied:
Calculate the following probabilities using R guro and then fill in the blanks with your answers.
a) The probability that 12 or fewer adults in the sample have hypertension is . Round your answers to three decimal places.
b) The probability that more than 10 adults in the sample have hypertension is . Round your answers to three decimal places.
c) Calculate the Var(X)=n ∗p∗(1−p) = . Round the answer to the nearest whole number.
The National and Nutrition survey reported that 30% of adults in the U. S have hypertension
A sample of 25 adults is studied
therefore X = 25
adults in the U. S have hypertension = 30% of 25
= 7.5
a) the probability that 12 or fewer adults in the sample have hypertension is
Let X: Number of adults that were told they have hypertension.
The scenario here follows the Binomial distribution since trials are independent and the probability of success( i .e having hypertension) is equal from trial to trial.
X~ Binomial(n=12, p =0.30)
Required probability,
P(X≥2)=1−P(X=0)−P(X=1)
=1−( 12 ( 12
0 )0.30^ 0(1−0.30) ^(12−0) − 1)0.30^ 1(1−0.30) ^(12−1)
=1−0.1660−0.0652
=0.768
b) the probability that more than 10 adults in the sample have hypertension is
Let X: Number of adults that were told they have hypertension.
The scenario here follows the Binomial distribution since trials are independent and the probability of success( i .e having hypertension) is equal from trial to trial.
X~ Binomial(n=10, p =0.30)
Required probability,
P(X≥2)=1−P(X=0)−P(X=1)
=1−( 10 ( 10
0 )0.30^ 0(1−0.30) ^(10−0) − 1)0.30^ 1(1−0.30) ^(10−1)
=1−0.2824−0.1089
=0.6086
c) Calculate the Var(X)=n ∗p∗(1−p)
n= 25
p=0.30
Var(X)=n ∗p∗(1−p)
= 25*0.30*(1-0.30)
=5.25
Probability that more than 10 adults in the sample have hypertension is 0.768
Var(X) = 5.25
The probability that more than 10 adults in the sample have hypertension is 0.6086
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Probability that more than 10 adults in the sample have hypertension is 0.768
Var(X) = 5.25
The probability that more than 10 adults in the sample have hypertension is 0.6086
The National and Nutrition survey reported that 30% of adults in the U. S have hypertension (high blood pressure). Let X be the number of adults in the U. S with hypertension.
A sample of 25 adults is studied:
Calculate the following probabilities using R guro and then fill in the blanks with your answers.
a) The probability that 12 or fewer adults in the sample have hypertension is . Round your answers to three decimal places.
b) The probability that more than 10 adults in the sample have hypertension is . Round your answers to three decimal places.
c) Calculate the Var(X)=n ∗p∗(1−p) = . Round the answer to the nearest whole number.
The National and Nutrition survey reported that 30% of adults in the U. S have hypertension
A sample of 25 adults is studied
therefore X = 25
adults in the U. S have hypertension = 30% of 25
= 7.5
a) the probability that 12 or fewer adults in the sample have hypertension is
Let X: Number of adults that were told they have hypertension.
The scenario here follows the Binomial distribution since trials are independent and the probability of success( i .e having hypertension) is equal from trial to trial.
X~ Binomial(n=12, p =0.30)
Required probability,
P(X≥2)=1−P(X=0)−P(X=1)
=1−( 12 ( 12
0 )0.30^ 0(1−0.30) ^(12−0) − 1)0.30^ 1(1−0.30) ^(12−1)
=1−0.1660−0.0652
=0.768
b) the probability that more than 10 adults in the sample have hypertension is
Let X: Number of adults that were told they have hypertension.
The scenario here follows the Binomial distribution since trials are independent and the probability of success( i .e having hypertension) is equal from trial to trial.
X~ Binomial(n=10, p =0.30)
Required probability,
P(X≥2)=1−P(X=0)−P(X=1)
=1−( 10 ( 10
0 )0.30^ 0(1−0.30) ^(10−0) − 1)0.30^ 1(1−0.30) ^(10−1)
=1−0.2824−0.1089
=0.6086
c) Calculate the Var(X)=n ∗p∗(1−p)
n= 25
p=0.30
Var(X)=n ∗p∗(1−p)
= 25*0.30*(1-0.30)
=5.25
Probability that more than 10 adults in the sample have hypertension is 0.768
Var(X) = 5.25
The probability that more than 10 adults in the sample have hypertension is 0.6086
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