True. In many situations, the true mean and standard deviation of a population are unknown and have to be estimated based on sample data. This is especially true in statistical inference, where we use sample statistics to make inferences about population parameters. For example, in hypothesis testing or confidence interval estimation, we use sample means and standard deviations to make inferences about the population mean and standard deviation.
To know more about standard deviation , refer here :
https://brainly.com/question/12402189#
#SPJ11
6. Describe some of the advantages and disadvantages to additional schooling.
Answer: you learn more, and it looks good on job applications, but you have to go to more school and use up more of your time
Step-by-step explanation:
A ball is launched from a 25.48-meter tall platform. The equation
for the ball's height h at time t seconds after launch is h (t) =
-4.9t2 +20.58t + 25.48, where his in meters. What is the
maximum height the ball achieves before landing?
Answer:
[tex]\boxed{47.089 \;meters} \\\\[/tex]
Step-by-step explanation:
For any function f(x), the maximum or minimum value can be determined by 1. Finding the first derivative f(x) with respect to x i.e. f'(x)
2. Setting this first derivative to 0, solving for x
3. Substituting for x in the original function to get the maximum/minimum value
[tex]\textrm{The equation for the function f(t) is }\\f(t) = -4.9t^2 + 20.58t + 25.48\\\\[/tex]
[tex]\textrm{The first derivative of this function with respect to t is }\\\\f'(t) = - 2\cdot 49t + 20.58\\= -9.8t + 25.48\\\\[/tex]
[tex]\textrm{Setting this first derivative equal to 0 gives:}\\\\-9.8t + 20.58 = 0\\\\-9.8t = -20.58 \;\;\;\;\;\textrm{(Subtracting 20.58 from both sides)}\\\\9.8t = 20.58 \;\;\;\;\;\; \textrm{ (Multiplying both sides by -1)}[/tex]
[tex]\textrm{Therefore }\\\\t = \dfrac{20.58}{9.8}\\\\t= 2.1 \textrm{ seconds}[/tex]
[tex]\textrm{Therefore, at = 2.1 seconds, the ball will reach its maximum height.}[/tex]
To find what this maximum height is, substitute t = 2.1 in the original equation and solve for h(t)
[tex]h(t)\;at\;t=2.1 \\h(2.1) = 4.9\cdot \:2.1^2+20.58\cdot \:2.1+25.48=47.089 \;meters\\\\[/tex]
[tex]\textrm{ The maximum height the ball achieves before landing is } \boxed{47.089 \;meters} \\\\[/tex]
[tex]\textrm {This occurs 2.1 seconds after launch }[/tex]
What is the difference between ⤠and �
⤠is the symbol for the euro, while ⥠is the symbol for the Japanese yen.
The euro, represented by the symbol â¤, is the official currency of 19 of the 28 member states of the European Union. It was introduced in 1999, and is the second-most traded currency in the world after the US dollar. The euro is managed and administered by the European Central Bank and the Eurosystem.
The Japanese yen, represented by the symbol â¥, is the official currency of Japan and is the third most traded currency in the world. It is issued and managed by the Bank of Japan, the country's central bank. The yen is used as a reserve currency by central banks and is often seen as a safe-haven asset during times of economic or political uncertainty.
Learn more about The euro and the Japanese yen:
https://brainly.com/question/16006964
#SPJ4
find the volume of figure B
Answer: 75m^3
Step-by-step explanation:
First, find the scale factor:
5/2 = 2.5
Multiply figure A's volume by the scale factor:
2.5 * 30
= 75 m^3
Solve using substitution.
Y = 2X + 10
Y = X + 2
Answer:
2+2%2%5+51%895%+8+81%9+61%+5%+8+%15+%
Answer:
(- 8, - 6 )
Step-by-step explanation:
y = 2x + 10 → (1)
y = x + 2 → (2)
substitute y = 2x + 10 into (2)
2x + 10 = x + 2 ( subtract x from both sides )
x + 10 = 2 ( subtract 10 from both sides )
x = - 8
substitute x = - 8 into either of the 2 equations and evaluate for y
substituting into (2)
y = - 8 + 2 = - 6
solution is (- 8, - 6 )
(xy−1)(xy+6)(xy−8)
Multiply the polynomials
Answer:
Step-by-step explanation:
just do - x + = -
- x - = +
so the answer is + i think
When 20 is added to a number, the result is 34. What is the number?
Determine whether each sequence has a negative common difference. Clearly explain your reasoning.
a). The sequence as represented in question a). is not an arithmetic sequence and hence, does not have a common difference.
b). The sequence formed by recording the daily odometer reading of a car after driving 15 miles each day does not have a negative common difference.
Which sequence has a negative common difference?It follows from the task content that the sequence which has a negative common difference be determined.
It follows that the common difference, by definition is the difference between successive terms a (n) of the sequence.
Therefore, common difference is usually given by; a (n) - a (n-1).
a). Since the given sequence is; 64, 32, 16, 8, ....
Since The common difference is; 32 - 64 ≠ 16 - 32 ≠ 8 - 16.
Hence, the sequence does not have a common difference and hence, is not an arithmetic sequence.
b). For a sequence involving the daily odometer reading of a car after driving 15 miles every day.
It follows that the recursive function for such a sequence would take the form; a (n) = a (n-1) + 15.
By comparison with the standard recursive function for arithmetic sequences, a (n) = a (n-1) + 15, it follows that the common difference, d = 15.
On this note, the common difference for the sequence is not a negative number.
Read more on arithmetic sequence;
https://brainly.com/question/13028577
#SPJ1
What are the 3 different slope formulas?
The three different forms of slope formulas are m=(y-b)÷x, m=(y-y₁)÷(x-x₁), and m=(-A)÷B.
The slope gives the steepness of a straight line. The three different forms of the slope of a linear equation are slope-intercept form, point-slope form, and standard form.
From the equation of slope-intercept form y=mx+b, the slope is calculated using the formula, m=(y-b)÷x. Here, the slope is m and the y-intercept is b.
From the equation of the point-slope form (y-y₁)=m(x-x₁), the slope is calculated using the formula, m=(y-y₁)÷(x-x₁). Here, points on the line are x₁ and y₁.
From the equation of standard form Ax+By=C, the slope is m=(-A)÷B. Here, constants or integers are A, C, and B.
In general, the slope is calculated using the formula, m = (Δy)÷(Δx)= (y₂-y₁)÷(x₂-x₁). Here, in the line, the coordinate of the first point is (x₁, y₁), and the second point is (x₂, y₂).
To know more about the slope:
https://brainly.com/question/14548961
#SPJ4
What lessons do we get from books that discuss applied regression analysis and other multivariable methods?
The lessons we get from book that discuss applied regression analysis and other multivariable is that it can be used in real-life problems such as prediction and forecasting.
As a very effective and practical statistical technique, regression analysis has numerous applications to the field of nursing science. It allows scientists to explain, forecast, and quantify the correlations between variables, and form credible conclusions about the underlying causes of any phenomenon under study.
Regression analysis is a reliable way for determining which variables have an impact on a particular topic of interest. The method of doing a regression allows you to safely establish which elements are most important, which factors may be ignored, and how these factors influence each other.
To learn more about regression analysis, click here:
https://brainly.com/question/28178214
#SPJ4
Choose the number line that represents the fraction equivalent to three-twelfths.
A number line with zero, one twelfth, two twelfths, three twelfths, four twelfths, five twelfths, six twelfths, seven twelfths, eight twelfths, nine twelfths, ten twelfths, eleven twelfths, and one marked on it. A red line is drawn from the zero mark to the three twelfths mark.
A number line with zero, one eighth, two eighths, three eighths, four eighths, five eighths, six eighths, seven eighths, and one marked on it. A red line is drawn from the zero mark to the three eighths mark.
A number line with zero, one fourth, two fourths, three fourths, and one marked on it. A red line is drawn from the zero mark to the one fourth mark.
A number line with zero, one fifth, two fifths, three fifths, four fifths, and one marked on it. A red line is drawn from the zero mark to the one fifth mark.
A number line with zero, one sixth, two sixths, three sixths, four sixths, five sixths, and one marked on it. A red line is drawn from the zero mark to the one sixth mark.
A number line marked with zero, one twelfth, two twelfths, three twelfths, four twelfths, five twelfths, six twelfths, seven twelfths, eight twelfths, ten twelfths, eleven twelfths, and one. From the zero point to the three twelfths mark, a red line is painted.
What is fraction?A fraction is a portion of a whole or, more broadly, any number of equal pieces. In ordinary English, a fraction represents the number of pieces of a specific size, such as one-half, eight-fifths, or three-quarters.
Here,
Multiply one times three, and four by three.
It will equal to three out of twelve or 3/12.
=1/4
A number line marked with zero, one twelfth, two twelfths, three twelfths, four twelfths, five twelfths, six twelfths, seven twelfths, eight twelfths, ten twelfths, eleven twelfths, and one. From the zero point to the three twelfths mark, a red line is painted.
To know more about fraction,
https://brainly.com/question/24638688
#SPJ1
reflection across the y-axis
N(-3, 1), G(0, 4), B(-1, 1)
The required reflection of the points N(-3, 1), G(0, 4), B(-1, 1) across the y-axis are N(3, 1), G(0, 4), B(1, 1) .
Explain reflection across y-axis.Point (x, y) is reflected across the x-axis as (x, -y). The y-coordinate stays the same when a point is reflected across the y-axis, but the x-coordinate is assumed to be the additive inverse.
According to question:We have,
N(-3, 1), G(0, 4), B(-1, 1)
While, find reflected points we are considering y-axis as mirror,
Then,
Reflection of point N(-3, 1) across the y-axis
⇒ N(3, 1)
Reflection of point G(0, 4) across the y-axis
⇒ G(0, 4)
Reflection of point B(-1, 1) across the y-axis
⇒ B(1, 1)
Thus, required reflected points are N(3, 1), G(0, 4), B(1, 1) .
To know about y-axis visit:
brainly.com/question/24751711
#SPJ1
If ALMN=AXYZ, which congruences are true by CPCTC? Check all that
apply.
L
M
N
☐A. ZX=ZN
B. MLYZ
C. LN = XZ
D. MN = YZ
E. ZY ZM
OF. ZZ = ZL
X
B. MLYZ and C. LN = XZ are not true, since these letters do not correspond to any sides or angles in the given triangles.
What is CPCTC?CPCTC stands for "Corresponding Parts of Congruent Triangles are Congruent." Given the statement "ALMN = AXYZ," we can assume that triangle ALMN is congruent to triangle AXYZ.
With that in mind, the following congruences are true:
A. ZX=ZN (Corresponding parts of congruent triangles)
D. MN = YZ (Corresponding parts of congruent triangles)
E. ZY ZMo (not a valid statement)
F. ZZ = ZL (not a valid statement)
B. MLYZ and C. LN = XZ are not true, since these letters do not correspond to any sides or angles in the given triangles.
To know more about congruent triangles visit: https://brainly.com/question/27848509
#SPJ1
Find the measure of the indicated angle in each triangle (all questions) Please include how you solved them!!
Answer:
A step to step solution
Step-by-step explanation:
The measure of all these angles is just adding up the remote interior angles (the 2 angles that are shown in every triangle in this worksheet)
Find the sum, and that is your answer.
The first solution is 49+80 = 129
Therefore, the answer for #1 is 129 degrees
PLEASE HELP ASAP *VERY IMPORTANT* I WILL GIVE BRAINLIEST
Answer:
parallelogram
Is the triangle with sides 25 cm 5 cm and 24 cm a right angle triangle give reasons for your answer?
It is possible to construct a triangle whose sides are 25 cm 5 cm and 24 cm because the sum of two sides are greater than third sides.
In the given question, we have to check that it is possible to construct a triangle whose sides are 25 cm 5 cm and 24 cm.
To check whether the given sides can make a triangle or not, we have to check that the sum of two sides always grater than the third side.
To check this we firstly add the 25 and 5
25 + 5 > 24
30 > 24
Now we add 25 and 24
25 + 24 > 5
49 > 5
Now we add 5 and 24
5 + 24 > 25
29 > 25
It is possible to construct a triangle whose sides are 25 cm 5 cm and 24 cm because the sum of two sides are greater than third sides.
To learn more about construct a triangle link is here
brainly.com/question/28055458
#SPJ4
How can I see my real face?
But to see one’s own face essential that the light emitted by it is either bounced back into our eyes (intimate a mirror - or something very much like it) - or that the light is recorded, captured and then played back into our eyes.
Did you know that shapes have a face? No, this face does not mean a face with two eyes, a nose, and a mouth. I mean a face of a shape, or the flat surface of a shape that you can trace and see. This face is known as a face in math.
Plane shapes in math mean any closed, flat, two-dimensional shape. All plane shapes have a face, because you can trace the shape of all plane shapes.
A triangle has a triangle face.
A rectangle has a rectangle face.
A diamond has a diamond face.
A circle has a circle face.
A square has a square face.
An oval has an oval face.
To know more about Face:
https://brainly.com/question/15974556
#SPJ4
A tree that is 3 feet tall is growing at a rate of 1 foot per year. A 5-foot tree is growing at a rate of 0. 75 foot per year. The ordered pair (t, h) represents the time in years, t, at which the trees are at height, h. Which ordered pair represents the number of years elapsed when the trees are at the same height?.
the ordered pair that represents the number of years elapsed when the trees are at the same height is (8,5). We were then asked to find the number of years elapsed when the trees are at the same height.
In this problem, we were given two different trees, one that is 3 feet tall and growing at a rate of 1 foot per year, and another that is 5 feet tall and growing at a rate of 0.75 feet per year. The ordered pair (3,1) represents the 3-foot tall tree growing at a rate of 1 foot per year and the ordered pair (5,0.75) represents the 5-foot tall tree growing at a rate of 0.75 feet per year.
To find the number of years elapsed when the trees are at the same height, we need to solve the equation:
3 + 1t = 5 + 0.75t
t = (5 - 3)/(1 - 0.75) = 2/0.25 = 8
So the ordered pair that represents the number of years elapsed when the trees are at the same height is (8,5).
Learn more about height, here https://brainly.com/question/10726356
#SPJ4
Mark the points A and B in your book 4 cm apart. Construct and shade the region that is closer to B than to A and within 3 cm of B. You must show all of your construction lines. A• B•
Marking of points A and B in 4 cm apart and shaded the region that is closer to B than to A and within 3 cm of B, in the coordinate plane.
What is Cartesian plane?The cartesian coordinate system includes a two dimensional plane known as the Cartesian Plane. Rene Descartes created the cartesian plane in the 17th century. The cartesian plane's ability to connect Euclidean geometry and algebra is its most significant characteristic.
Numerical coordinates can be used to describe any point on a cartesian plane. An ordered pair is used to express a point's coordinates on a cartesian plane. These points are also signed, and their distance from two perpendicular lines known as axes is fixed.
Learn more about Cartesian Plane
https://brainly.com/question/4726772
#SPJ1
Find the distance between points (-5,4) and (9,4
Answer:
9 units
Step-by-step explanation:
The y values are the same, this means that this is a horizontal line. The distance from -5 to 9 is 14 units.
Answer:
14
Step-by-step explanation:
using the distance formula to determine the distance between the two points
What is R in the formula A πr2?
r is called as radius in the formula A=πr^2
A large part of the field of operations research is the use of statistical equations to solve problems in business or military operations.
Music, linguistics, and philosophy all use mathematical models (for example, intensively in analytic philosophy).
A model is, for example, the method for the area of a circle, πr2.
Radius of a circle is the distance from the center of the circle to any point on it's circumference. It is usually denoted by 'R' or 'r'. This quantity has importance in almost all circle-related formulas. The area and circumference of a circle are also measured in terms of radius.
Α= pi r^2
Divide each side by pi
A / pi = r^2
Take the square root of each side
sqrt( A / pi ) = sqrt(r^2)
sqrt( A / pi ) =r
learn more about of radius here
https://brainly.com/question/17125037
#SPJ4
On a highway a wreck occurred and caused a 10 mile traffic jam on one sicle of the road.
Assuming the average car is 13.5 feet in length, how many vehicles are stuck in the traffic jam?
Calculating the total VMT or VKT for all road segments during a certain time period by multiplying the daily traffic volume on each segment by its length.
How many cars in a mile of traffic jam?The average automobile is around 15 feet long, so if you multiply 5280 by this number, you get about 350 cars, assuming they are all touching. Just over 284 million automobiles were on the road in the second quarter of 2022 in the United States. Though estimating the overall number of automobiles on the planet is not a precise science, the number is rising quickly.
Given that the ACS estimated there were 150 million workers in 2016, there are at least 115 million automobiles and trucks on American roads every day. Congestion is expected to be so bad during morning and afternoon rush hours. A balance between the demand for using the system and the infrastructure's capabilities can be achieved by creating digital twins of the transportation system and using them to optimise flows.
To learn more about traffic jam refer to :
https://brainly.com/question/17618037
#SPJ1
find h (3) if h (x) = 3 - 3/x
Answer:
0
Step-by-step explanation:
h(x) = 3 – 3/x
h(3) = 3 – 3/3
h(3) = 0/3
h(3) = 0
i hope this helped
IM NOT SURE IF THIS IS RIGHT CAN SOMEONE PLEASE HELP MEEEEE!!!!!
5 starts and a thanks+brainliest
find the slope of the line passing through the point and perpendicular to the given line [tex](-5,2) 4x-3y=12[/tex]
options: -3/4 or -4/3
The slope of the line passing through the equation 4x - 3y = 12 is given by Slope m = -3/4
What is an Equation of a line?The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept
And y - y₁ = m ( x - x₁ )
y = y-coordinate of second point
y₁ = y-coordinate of point one
m = slope
x = x-coordinate of second point
x₁ = x-coordinate of point one
The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given data ,
Let the equation of line be represented as A
Now , the value of A is
4x - 3y = 12 be equation (1)
Now , on simplifying the equation , we get
Adding 3y on both sides of the equation , we get
3y + 12 = 4x
Subtracting 12 on both sides of the equation , we get
3y = 4x - 12
Divide by 3 on both sides of the equation , we get
y = ( 4/3 )x - 4
It is of the form y = mx + b where m is the slope and b is the y-intercept
So , slope m₁ = 4/3
Now , the line is perpendicular to the line y = ( 4/3 )x - 4
So , the product of their slopes is -1
And , m₁ x m₂ = -1
Substituting the values in the equation , we get
m₂ = ( 3/4 ) x -1
m₂ = -3/4
Hence , the slope of the line is -3/4
To learn more about equation of line click :
https://brainly.com/question/14200719
#SPJ1
Substitution y=2x - 6
y= 5x+8
Answer:
The result can be shown in multiple forms.
Point Form: ( 2, − 2 )
Equation Form: x = 2 , y = − 2
Step-by-step explanation:
1. Eliminate the equal sides of each equation and combine them.
2x − 6 = − 5x + 8
2. Solve 2x − 6 = −5x +8 for x.
x = 2
3. Evaluate y when x = 2.
y = − 2
The solution to the system is the complete set of ordered pairs that are valid solutions.
( 2, − 2 )
The result can be shown in multiple forms.
Point Form: ( 2, − 2 )
Equation Form: x = 2 , y = − 2
Answer:
x = 2
y = -2
Step-by-step explanation:
Substitute equation 1 into equation 2 then solve for x:
2x - 6 = -5x + 8
7x = 14
x = 14/7 = 2
Now substitute x=2 into either equation to solve for y:
y = 2(2) - 6 = -2
1) Marisol works for a florist that sells two types of bouquets, as shown below. On Monday, Marisol used
96 tulips to make the bouquets. On Tuesday, she used 192 tulips to make the same number of Spring Mix
bouquets as Monday, but 3 times as many Garden Delight bouquets.
a. Write a system of equations that you can use to find how many bouquets of each type Marisol made.
b. Find the total number of tulips Marisol used to make Garden Delight bouquets on Monday and Tuesday.
To calculate how many flowers of each kind Marisol created, use the formulae x+y=96 and x+3y=192. Marisol used 48 tulips in total to produce Garden Delight bouquets on Monday and Tuesday.
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. A mathematical statement made up of two expressions joined by an equal sign is known as an equation. 3x - 5 = 16 is an example of an equation. We get the value of the variable x as x = 7 after solving this equation.
Here,
Let x be Spring Mix bouquets and y be the Garden Delight bouquets.
x+y=96
x+3y=192
2y=96
y=48
x=48
The system of equations that you can use to find how many bouquets of each type Marisol made is x+y=96 and x+3y=192. The total number of tulips Marisol used to make Garden Delight bouquets on Monday and Tuesday is 48.
To know more about equation,
https://brainly.com/question/28243079
#SPJ1
What is 2y + 8x =
HELP ME!
The solution of equation: 2y + 8x = 2(y + 4)x.
Define the term common factor?A whole number that is a multiplier of at least two numbers is referred to as a common factor. The largest factor that would divide into two or so more numbers is known as the highest common factor (HCF). The smallest multiple shared by two or more numbers is known as the lowest common multiple (LCM).In mathematics, the term "common factors" refers to the common divisors that are used when two or more integers are precisely divided by the identical number or numbers.For the stated equation:
= 2y + 8x
As. 2y and 8x both are divisible by 2 .
So, Taking two common from both.
= 2(y + 4x)
Thus, the solution of the equation becomes: 2(y + 4x).
To know more about the common factor, here
https://brainly.com/question/25266622
#SPJ1
A company rents paddleboards by charging a rental fee plus an hourly rate. Write an expression that represents the cost (in dollars) of renting a paddleboard for h hours.
The expression that represents the cost (in dollars) of renting a paddleboard for h hours is r + xh
How to determine the cost for h hoursFrom the question, we have the following parameters that can be used in our computation:
Cost of rents:
Charging a rental fee plus an hourly rate.
Using the above as a guide, we have the following:
Initial rental fee = r
Hourly rate = x
The cost for h hours can then be represented as
C(h) = Initial rental fee + Hourly rate * Number of hours
Substitute the known values in the above equation, so, we have the following representation
C(h) = r + x * h
Evaluate
C(h) = r + xh
Hence, the expression is r + xh
Read more about linear expression at
https://brainly.com/question/15602982
#SPJ1
(Two-Step Linear Inequalities MC)
Which graph represents the solution to the inequality 2(b + 2) > 24?
number line with open point at 10 with arrow pointing left
number line with closed point at 10 with arrow pointing left
number line with closed point at 10 with arrow pointing right
number line with open point at 10 with arrow pointing right
The graph that represents the solution to the inequality is a number line with closed point at 10 with arrow pointing left
What is an inequality?You should be aware that inequality is is a mathematical statement showing that two opposite things are not equal. The graph is a diagram that illustrates the statement.
The given inequality is 2(b + 2) > 24
Opening the brackets to get
2b+4≥24
2b≥24-4
This implies that 2b≥20
Making b the subject
b≥20/2
b≥10
Conclusively the graph is a number line with closed point at 10 with arrow pointing left
Study more about an inequality on https://brainly.com/question/28823603
#SPJ1