The Central Limit Theorem gives the idea that a large number of sample means or proportions will approximate a normal distribution, regardless of the distribution of the population from which they were drawn .
Central Limit Theorem : In probability theory , the Central Limit Theorem establishes that , in many situations , when independent random variables are summed up , their properly normalized sum tends toward a normal distribution even if the original variables themselves are not normally distributed .
The Central Limit Theorem gives the idea that a large number of sample means or proportions will approximate a normal distribution, regardless of the distribution of the population from which they were drawn .
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7. Write the equation of the line that is parallel to the line
represented by the table and passes through the point
(-3,-10).
X
0
4
8
12
Y
10
6
2
-2
The equation of the line that is parallel to the line y = -x + 10 is y = -x - 13.
Given table:
x y
0 10
4 6
8 2
12 -2
slope m = 6 - 10 / 4 - 0
= -4/4
m = -1
substitute in y=mx+c
y = -x+c passes through (0,10)
10 = -0 + c
c = 10.
y = -x + 10.
here m = -1 and passes through (-3,-10)
y = mx +c
-10 = -1(-3)+c
-10 = 3 + c
c = -13
y = -x + (-13)
y = -x - 13.
Therefore the equation of the line that is parallel to the line y = -x + 10 is y = -x - 13.
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For a science project each student needs 5 paper plates. If there are
15 students working on the project, how many paper plates are needed?
Answer:75
Step-by-step explanation:
since there are 15 students and they each need 5 plates you just do 15x5 and get 75
Is this correct just need to make sure
Yes, it is correct. (a) congruent by SSS
(b) congruent by SAS
(c) congruent by ASA
(a) Given in figure,
MN = OP
∠MNO = ∠NOP
ON = ON (Common)
Hence, ΔMNO ≅ ΔNOP by SAS.
(b) Given in figure,
UV = XY
∠UVW = ∠XYZ
UW = XZ
Hence, ΔUVW ≅ ΔXYZ by SAS.
(C) Given in figure,
∠ABC = ∠EDF
BC = DE
∠ACB = ∠DEF
Hence, ΔABC ≅ ΔDEF by ASA.
Therefore, all are congruent.
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Express 35cents to $2.25 as a ratio in its lowest terms
Answer:
7 cents:$0.45
Step-by-step explanation:
(whatever you do to one side you do the same to the other)
35 divided by 5= 7
2.25 divided by 5= 0.45
evaluate the expression and enter expression and enter your answer in the box below -3•(6+2)+232÷8
Answer:
5
Step-by-step explanation:
Distribute 1st
-3 x 8 +232 /8
Multiply -3 and 8
-24 +232 /8
Divide 232 and 8
-24+29
Add -24 and 29
5
I need help with these questions please help
Step-by-step explanation:
2.
it is a square !
what do we know about squares ?
first of all, they are a special rectangle, where length = width, and therefore all 4 sides are equally long.
and secondly, as they are a form of rectangle, every inner angle is 90°.
so,
6x - 12 = 90
6x = 102
x = 102/6 = 17
therefore,
CD = x + 15 = 17 + 15 = 32
many greetings to your teacher, CD is a side, a length, and NOT an angle, so it is NOT measured in degrees (°).
since it is a square and all sides are equally long,
AD = CD = 32
3.
it is a rectangle.
so, it has 4 sides consisting of 2 pairs of equally long sides. that means there are 2 equally long side we call length, and 2 equally long sides we call width.
these equally long sides are always opposite of each other.
that means
2x - 52 = x - 2
x - 52 = -2
x = -2 + 52 = 50
What is the measurement of segment PR?
Answer:
The first measurement is known as the "P-R interval" and is measured from the beginning of the upslope of the P wave to the beginning of the QRS wave. This measurement should be 0.12-0.20 seconds, or 3-5 small squares in duration.
Step-by-step explanation:
...
1.2
Which of the following expressions represents "the product of a number and eight"?
8x
X+8
X/8
8-x
The expression that represents the statement "the product of a number and eight" is 8x.
Expression:
Expression means the mathematical statement that consists of minimum of two numbers/variables and at least one math operation(addition, subtraction, multiplication and division) in it.
Given,
The given statement is "the product of a number and eight".
Now, we have to find the suitable expression for this statement.
In order to find the suitable expression, we have to divide the given statement and then we have to identify the keyword in it.
By using those keywords, we have to solve it.
In the given statement we have identify the following:
product
number
eight
Here the product refers the multiplication
number is any unknown number that is x.
eight refers the number 8.
When we combine these keywords we can get the expression 8x.
Therefore, the resulting expression is 8x.
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Express 900 as a product of its prime factors in index form.
Write the prime factors in ascending order.
The product of prime factors of 900 in index form is [tex]2^{2} *3^{2} *5^{2}[/tex] and the ascending order of prime factors is 2, 3 and 5.
According to the question,
We have the following number:
900
This number needs to prime factorized. So, first it can be divided by 2 (450), again 450 can be divided by 2 (225), it can be divided by 3 (75), it can again be divided by 3 (25), this can be divided by 5 (5) and it will be finally divided by 5.
So, we have the following product for the prime factors of 900:
2*2*3*3*5*5
In index form, it will be written as follows:
[tex]2^{2} *3^{2} *5^{2}[/tex]
Now, we know that in ascending order, numbers are arranged from smallest to largest.
So, we have the following order:
2, 3 and 5
Hence, the product of prime factors of 900 in index form is [tex]2^{2} *3^{2} *5^{2}[/tex] and the ascending order of prime factors is 2, 3 and 5.
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Which of the following is the correct factorization of the polynomial below?
x³-18
A. (x+3)(x-6)
B. (x-3)(x+6)
C. (x+3)(x² - 4x+6)
D. The polynomial is irreducible.
SUBMIT
Answer: D. The polynomial is irreducible.
From the explanation below we do not get polynomial .
Step-by-step explanation:
A.(x+3)(x-6)
= x^2-6x+3x-18
=x^2-3x-18
B.(x-3)(x+6)
=(x^2+6x-3x-18)
=x^2+3x-18
C.(x+3)(x^2-4x+6)
=x^3-4x^2+6x+3x^2-12x+18
=x^2-x^2-6x+18
D.The polynomial is irreducible
What is the equation of the line in slope-intercept form?
the line perpendicular to Y = 4/9x - 6 through (5, -6)
The required equation will be y = -1/3x + 21/4 in slope-intercept form.
What is the equation of a line?The general equation of a line is y = mx + c
where m is the slope of the line and c is the intercept.
First, we need to determine the slope of the given line.
y = 4/9x - 6
Here the slope of the given line is 4/9.
The required line is perpendicular to a given line
So the required line's slope will be m₂ = -1 / (4/9) = -9/4
The line passes through the point (5, -6) which is given in the question,
Now we can use the point-slope form of a line to create the equation of the new line:
(y + 6) = (-9/4) (x - 5)
y = (-9/4)x + 45/4 - 6
y = -1/3x + 21/4
Hence, the required equation will be y = -1/3x + 21/4 in slope-intercept form.
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Charities can claim an extra 25% of the value of a donation back from the government. This is called gift aid. Work out how much gift aid a charity can claim on a donation of £273.50. Give your answer to the nearest penny
Answer:
Gift aid 68.38 £
Step-by-step explanation:
Proportion:
273.50 £ - 100%
X £ - 25%
Gift aid:
X = 273.50·25% / 100% = 273.50 / 4 ≈ 68.38 £
Ray buys a computer game for $38. He uses a coupon to receive 15% off the price of the game. After the coupon is deducted, he must pay 6% sales tax. What is the tota cost of the game, to the nearest cent? A $28.00 C. $34.58 D. $36.56
Elena had 24 base hits in 110 at bats. She has done a lot of practice and now thinks that for all of her future at bats in this season, she will have a batting average of 0.350. If she does, then how many more at bats will Elena need so that with this average, she reaches a 0.300 batting average overall for the whole season?
Elena will need 180 more bats
Let she bats b more needs
Total bats = 110 + b
Base hits = 24 + 0.35 b
From the question, we have
( 24 + 0.35b) / (110 + b) = 0.300
24 + 0.35b = 33 + 0.3 b
0.05 b = 9
b = 9 / 0.05 = 180
Subtraction:
The process of removing items from a collection is represented by subtraction. Subtraction is represented by the minus sign. If, for instance, there are nine oranges stacked together (as shown in the above figure), and four of those oranges are then moved to a basket, the stack will contain nine minus four oranges, or five oranges. As a result, 9 minus 4 equals 5, or the difference between 9 and 4. Incorporating subtraction into other types of numbers is possible in addition to using it with natural numbers.
The symbol for subtraction is the letter "-". The three numerical elements that make up the subtraction operation are the minuend, the subtrahend, and the difference. As the first integer to be subtracted from in a subtraction phrase, a minuend is the first number in the subtraction process.
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Me ayudan a resolver la numero 5 porfa
The solution to the inequality 6 + t ≤ 13 is given as follows:
t ≤ 7.
How to solve an inequality?An inequality is solved similarly to an equality, isolating the variable of which the solution we want to find.
The difference, of the inequality compared to an equality, is that the solution contains an infinity number of values, instead of a finite number of values. This is because the solution of an inequality is composed by a range of values in one of the infinity number sets.
For this problem, the inequality is given as follows:
6 + t ≤ 13
Hence the solution for variable t is found isolating it as follows:
t ≤ 13 - 6 (moving every term that is not the variable to the opposite side)
t ≤ 7.
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Please help!!!!!!!!!!
Answer: 81
Step-by-step explanation:
Let's start with what we know:
Time spent each evening = 1/3 of an hour
Time spent: 27
We need to turn the time spent into minutes so We will do
27 * 60 = 1620 minutes
As well as we need to turn the 1/3 of an hour into minutes so we will do
1/3 * 60 = 20 minutes
So now we have these numbers
You can pick any letter but I will pick x
We can do 20x = 1620 (Time spent times number of evenings equals time spent)
Then after that you just divide 20x/20 and 1620/20
Then getting x = 81.
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which of the following statements is false? group of answer choices older men tend to have lower muscle density, so the correlation between age and muscle density in older men must be negative. older children tend to be taller than younger children, so the correlation between age and height in children must be positive. a researcher finds that the correlation between two variables is close to 0, so the two variables must be unrelated. taller people tend to be heavier than shorter people, so the correlation between height and weight must be positive.
The correct statement would be older men tend to have lower muscle density, so the correlation between age and muscle density in older men must be negative.
Increased time studying sets of tea time is associated with higher G. P.A. (Grade point average) This is positive. More time studying G. P. A. Life expectancy increases as body weight decreases. As the weight goes down the life expectancy goes up.
Muscle Density:Muscle mass (quantity) is highly correlated with survival in hospitalized patients with advanced cancer, whereas muscle density (quality) is associated with patients’ symptoms, health care use, and survival, according to a group of researchers
Correlation:In statistics, correlation or dependence is any statistical relationship, whether causal or not, between two random variables or bivariate data. Although in the broadest sense, "correlation" may indicate any type of association, in statistics it usually refers to the degree to which a pair of variables are linearly related. Familiar examples of dependent phenomena include the correlation between the height of parents and their offspring, and the correlation between the price of a good and the quantity the consumers are willing to purchase, as it is depicted in the so-called demand curve.
Your body shape changes naturally as you age. You cannot avoid some of these changes, but your lifestyle choices may slow or speed the process.
The human body is made up of fat, lean tissue (muscles and organs), bones, and water. After age 30, people tend to lose lean tissue. Your muscles, liver, kidney, and other organs may lose some of their cells. This process of muscle loss is called atrophy. Bones may lose some of their minerals and become less dense (a condition called osteopenia in the early stages and osteoporosis in the later stages). Tissue loss reduces the amount of water in your
The amount of body fat goes up steadily after age 30. Older people may have almost one third more fat compared to when they were younger. Fat tissue builds up toward the center of the body, including around the internal organs. However, the layer of fat under the skin gets smaller.
The tendency to become shorter occurs among all races and both sexes. Height loss is related to aging changes in the bones, muscles, and joints. People typically lose almost one-half inch (about 1 centimeter) every 10 years after age 40. Height loss is even more rapid after age 70. You may lose a total of 1 to 3 inches (2.5 to 7.5 centimeters) in height as you age. You can help prevent height loss by following a healthy diet, staying physically active, and preventing and treating bone loss.
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Find the HCF of 4x³yz"; 30x²y²z² and 36x³y²z³
The highest common factor (HCF) for the expression 4x³yz"; 30x²y²z² and 36x³y²z³ is 2x²yz.
What is H.C.FThe H.C.F. defines the highest common factor present in between given two or more numbers or mathematical expression.
We shall derive the HCF of the three expressions by expressing them as multiples of their factors as follows;
4x³yz = 2 × 2 × x × x × x × y × z
30x²y²z² = 2 × 3 × 5 × x × x × y × z × z
36x³y²z³ = 2 × 2 × 3 × 3 × x × x × x × y × y × z × z × z
HCF = 2 × x × x × y × z
HCF = 2x²yz
Therefore, the highest common factor for the expressions 4x³yz"; 30x²y²z² and 36x³y²z³ with the understanding of HCF is 2x²yz.
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united airlines flight 179 is a nonstop flight from boston to san francisco. during 2016 the mean length of time for all flights was 357.9 minutes and population standard deviation was 20.18 minutes. you want to construct a 95% confidence interval for the mean length of time of the flight in 2018 based on a sample of flights in 2018. what is the minimum size of the sample needed in order to have a margin of error of two minutes or less?
Using the concepts of statistics, we got that at least 79 is the minimum size of the sample needed in order to have a margin of error of two minutes or less, when we need to construct a 95% confidence interval for the mean length of time.
We have mean as 357.9minutes and standard deviation as 20.18 minutes.
To have the margin error 2 minutes or less than it we need to take
Z-score of the given sample distribution which is given by:
Z=(X-μ)/σ
The z-score measures how many standard deviations the measure is above or below the mean.Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation .Here ,μ=357.9,σ=20.18,X=?,Z=95/100
=>95/100=(X-357.9)/20.18
=> -0.95×20.18=X-357.9
=>X=-357.9+0.95×20.18
=>X=-357.9+19.171
>X=-338.729
When X=-338.729,the p score is around 79.
Hence, when I want to construct a 95% confidence interval for the mean length of time of the flight in 2018 based on a sample of flights in 2018., the minimum size of the sample needed in order to have a margin of error of two minutes or less is 79.
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Dan spends
34
of his wages on rent and
18 on food. If he makes £240 per week, how much money does he have left?
Dan has money left is £30.
Given:
Dan spends 3/4 of his wages on rent and 1/8 on food.
If he makes £240 per week.
Money left = 240 - 240* 3/4 - 240 * 1/8
= 240 - 60*3 - 240/8
= 240 - 180 - 30
= 60 - 30
= 30.
Therefore Dan has money left is £30.
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Can anyone state the vertex of the graph?
The graph has no vertex and the transformations from the parent function are
Vertical shift down 2Horizontal shift left 4How to determine the vertex?By definition, the vertex of a function is the maximum or the minimum of the function
From the graph, we can see that the graph only has a turning point; it has no maximum or minimum
So, we can conclude that there is no vertex in the graph
The transformationHere, we have:
We can see that:
The graph is 4 units to the left of the origin and 2 units below the origin
This means that the function has been shifted down and shifted to the left
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Solve |2x - 3| < 7.
Answer:
5 or (-2,5)
Step-by-step explanation:
|2x-3|<7
2x-3<7
2x=10
x=5
Answer:
x < 5
Step-by-step explanation:
Add 3 to both sides of the equation. This is to balance the equation.2x - 3 + 3 < 7 + 3
Now, add 7 and 3.7 + 3 = 10
Add -3 and positive 3.-3 + 3 = 0
= 2x + 0
= 2x
Now, the problem becomes,2x < 10
Divide by 22x/2 < 10/2
Divide by 2: 10/210/2 = 5
Divide by 2: 2x2x/2 = 2/2
= x (We assume x = 1)
Divide both numbers= 5/1
= 5
Therefore,
x < 5
Hope this helps!
Write a unit rate for the situation.
Situation: 87 students in 3 classrooms
Unit rate:
students per classroom
The unit rate for the given situation is 29 students per classroom.
What is the unit rate?
A unit rate is described as a ratio comparing the first quantity to one unit of the second quantity.
Given situation is 87 students in 3 classrooms.
So, the unit rate [tex]= \frac{87}{3}[/tex] students/classroom
[tex]= 29[/tex] students per classroom
Hence, the unit rate for the given situation is 29 students per classroom.
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pls answer all the questions FOIL pre calc
Answer for Part I: x² - 3x - 10
Step-by-step explanation:
The FOIL method means to multiply the "First, Outside, Inside, and Last" in order of the terms. See attached for a visual and the work behind the answer.
Using this method, we end up with;
x² - 3x - 10
help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The curve -3[tex]x^{2}[/tex] + 18x +3 has a maximum value of 30 at x = 3
What is a maximum point?In mathematics, a point at which a function’s value is greatest. If the value is greater than or equal to all other function values, it is an absolute maximum. if it is merely greater than any nearby point, it is a relative, or local, maximum. In calculus, the derivative equals zero or does not exist at a function’s maximum point.
Differentiate f(x) = -3[tex]x^{2}[/tex] + 18x +3 ,
we have dy/dx = -6x + 18.
at turning point, dy/dx = 0
-6x + 18 = 0
6x = 18
x =18/3
x = 3
to check if x = 3 is a minimum or maximum point, we take the second derivate
which is [tex]\frac{d^{2}y }{dx^{2} }[/tex] = -6
since [tex]\frac{d^{2}y }{dx^{2} }[/tex] < 0
F(x) is a maximum,
so maximum value of x, we substitute x = 3 into the function
f(x) = -3[tex](3)^{2}[/tex] + 18(3) + 3
f(x) = 30
In conclusion, the maximum value for the function is 30 at x = 3
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the binominal distribution: a. is symmetric irrespective of the value of the probability of success. b. models n independent replications of a bernoulli experiment, each with a probability p of success. c. assumes that the average number of occurrences per unit is a constant and that occurrences are independent. d. is a discrete distribution used to model the number of occurrences in some unit of measure
The correct option is B "Models n independent replications of a Bernoulli experiment each with a probability p of success".
What is binomial distribution?It is a frequency distribution of the number of successful outcomes that could occur in a set number of trials with an equal chance of success. In probability theory and statistics, the discrete probability distribution of the number of successes in a series of n independent experiments, each asking a yes-or-no question and each with its own Boolean-valued outcome: success or failure, is known as the binomial distribution with parameters n and p. When each trial has the same probability of achieving a given value, the number of trials or observations is summarized using the binomial distribution. The probability of observing a specific number of successful outcomes in a specific number of trials is determined by the binomial distribution.
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what is the probability that a card drawn randomly from a standard deck of 5252 cards is a red queen? express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.
The probability that a card drawn randomly from a standard deck of 52 cards is a red queen is 1/26 or 0.038461. The result is obtained from the ratio of the number of red queen to 52 cards.
How to calculate probability?Probability of an event can be expressed as
P(A) = n(A) / n(S)
Where
P(A) is the probability of an event An(A) is the number of favorable outcomesn(S) is the total number of events in the sample spaceIn case a card drawn randomly from 52 cards, what is the probability that it is a red queen?
The four suits for a standard deck of 52 cards are hearts, diamonds, clubs, and spades of 13 cards each. The hearts and diamonds are red. While, the clubs and spades are black. The 13 cards are Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King.
From that information, the number of red queen in a standar deck of 52 cards is 2 cards. So,
n(S) = 52n(A) = 2The probability of drawing a red queen is
P(A) = n(A) / n(S)
P(A) = 2/52
P(A) = 1/26
P(A) = 0,038461
Hence, the probability that a card drawn is a red queen is 1/26 or 0,038461.
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f(x)=5+7x-9x^2+4^3 state the end behavior of f(x). Explain (x). Explain or show your reasoning.
The end behavior of given polynomial function f(x) = 5 + 7x - 9x^2 + 4^3,
as x → -∞, f(x) → -∞
as x → ∞, f(x) → -∞
In this question, we have been given a polynomial function
f(x) = 5 + 7x - 9x^2 + 4^3
We need to state the end behavior of f(x).
The graph of f(x) is as shown below.
We can observe that as x tends to -∞, f(x) → -∞
Also, as x → ∞, f(x) → -∞
We know that the end behavior of polynomial function is determined by the degree of the polynomial and the leading coefficient.
For given polynomial function, the degree of this polynomial is 2.
The leading coefficient is -9
We know that for polynomial function of even degree, the ends of the function graph point in the same direction.
Therefore, the end behavior of given polynomial function f(x) = 5 + 7x - 9x^2 + 4^3,
as x → -∞, f(x) → -∞
as x → ∞, f(x) → -∞
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What is the angle amount of m
The angle amount of m is 128⁰
What is meant by an angle?Angle can also refer to the length of a rotation or an angle. The Greek word , which means "crooked, curled," and the English word "ankle," are related words. Both stem from the Proto-Indo-European root which means "to bend" or "bow," in some way.
A plane angle, according to Euclid, is the inclination to each other of two intersecting lines in a plane that are not perpendicular to one another. Proclus asserts that an angle must be either a quality, a number, or a connection. Eudemus used the first idea, viewing an angle as a departure from a straight line; Carpus of Antioch used the second idea, viewing an angle as the distance or space between intersecting lines; and Euclid used the third idea. Vertical angles, opposing angles, or vertically opposite angles refer to a pair of angles that are directly across from one another and are created by two straight lines meeting to form a "X". Vert is the shorthand for them. opp.
The vertical angle theorem states that angles that are vertically opposing are equal. The assertion shown that since both of a pair of vertical angles are supplementary to both of the neighboring angles, the vertical angles are equal in measure, according to Eudemus of Rhodes' attribution of the proof to Thales of Miletus. When Thales visited Egypt, it is recorded in history[9] that he noticed the Egyptians measuring the vertical angles whenever two intersecting lines were drawn to ensure that they were equal. Thales came to the conclusion that one might establish
4x+6=7x-21
3x=27
x=9
x+x+42+42=360
2x+84=360
x=128⁰
Therefore, the angle amount of m is 128⁰
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what is 56/80 as a percentage
Answer:
To do percentages with fractions,
divide the numerator by denominator to get a decimal,
so for example, your question 56/80.
56/80 is 0.7 decimal, and then to make it percent,
we multiply by 100,
how does that work?
you move two places to the right because 100 has two zeros
so 0.7 would be 70,
therefore the percent of 56/80 would be 70%
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