We estimate the mean of a population that is normally distributed, has an unknown standard deviation, and small n, because it allows us to make better predictions about the population mean than the standard normal curve.
True, True, True, False, True, True.
The formula for the t-distribution is given by:
t = (x-μ)/(s/√n)
Where x is the mean of the sample, μ is the mean of the population, s is the sample standard deviation, and n is the sample size.
The t-distribution approaches the standard normal distribution as n increases because the denominator, s/√n, gets smaller, making the t-distribution smaller. As n increases, the tails in the t-distribution become "fatter" because the denominator in the formula gets smaller and the resulting t-distribution has a wider range of values.
The shape of the t-distribution depends on its degrees of freedom, which is the number of values in the sample minus one. The more degrees of freedom, the more the t-distribution resembles the standard normal curve.
We use the Student's t-distribution when we estimate the mean of a population that is normally distributed, has an unknown standard deviation, and small n, because it allows us to make better predictions about the population mean than the standard normal curve.
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Pls the area of the figure.
Answer:
36
Step-by-step explanation:
4 x 4 = 16
2 x 10 = 20
You would have to separate the square and the rectangle.
The way you do this is by cut of the number and subtracting them, like 6 and 2 to get the square.
i need help please with this problem
Answer:
Pleae see the attached graph.
Step-by-step explanation:
The values of x are graphed for their respective valid regions, as defined in the question.
On one day at a local minigolf course, there were 320 customers who paid a total of $2,900. If the cost for a child is $7 per game and the cost for an adult is $10 per game, write a system of equations to model this scenario, where x represents the number of children and y represents the number of adults who played that day.
Answer: We can write a system of equations to model this scenario using the information given.
Let x represent the number of children who played minigolf that day, and let y represent the number of adults who played minigolf that day.
The first equation represents the total number of customers, which is the sum of the number of children and the number of adults.
x + y = 320
The second equation represents the total amount of money earned, which is the product of the number of children playing and the cost per child's game plus the product of the number of adults playing and the cost per adult's game.
7x + 10y = 2900
So the system of equations that models this scenario is:
x + y = 320
7x + 10y = 2900
We can use this system of equations to find the number of children and adults who played minigolf that day, given the total number of customers and total amount of money earned. By solving this system of equations we can find the values for x and y.
Step-by-step explanation:
Do sides 5 cm 12cm and 13cm form a right angled triangle give reason?
Yes, the mentioned sides of triangle will be right angles triangle because they follow Pythagoras theorem.
A right angled triangle is characterized by presence of hypotenuse, perpendicular and base. The sides of right angled triangle are related through Pythagoras theorem, which is -
Perpendicular² = Base² + Hypotenuse²
As we know that hypotenuse is the longest side of triangle, hence, will be the 13 cm.
So, keeping the values in formula -
13² = 5² + 12²
Taking square on both the sides of equation
169 = 25 + 144
Performing addition on Right Hand Side of the equation
169 = 169
Since, LHS is equal to RHS, hence, it is right angled triangle.
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Create math problems with the words : spent, difference, decreased, and dropped (temp) for subtraction
The math word problems with the given words is A has 52 marbles, B has 105 marbles, find the difference between the number of marbles between A and B.
What are word problems?A math word problem is a question that is written as one or more sentences and asks students to use their mathematical understanding to solve an issue from "real world."
1. A has 52 marbles, B has 105 marbles, find the difference between the number of marbles between A and B.
2. The temperature of city A is 35 degrees, on the second day the temperature decreased to 15 degrees. How much did the dropped (temp)?
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kiran's Mother gets a resturant bill for $40. She has a coupon for 25% off. After the discount is applied, she adds 20% as a tip. What is the total after the discount and tip? Explain or show your reasoning.
Answer: $36
Step-by-step explanation:
Bill is $40, the 25% off coupon is used, and the 20% tip is left.
Step 1: Find 25% of 40
is/40=25/100 ------> 40(25)/100=10
Step 2: Find the new bill price after discount
40-10=30
Step 3: Find the 20% tip of 30
is/30=20/100 ---------> 30(20)/100=6
Step 4: Add the tip with the restaurant bill
30+6=$36
Xin has $126 to purchase balloons for her friend's birthday. Each balloon costs $6. The function p= 126-6m represents the amount of
money Xin has after purchasing n balloons. What is the zero of the function?
So, on solving the question we can say that equation p= 126-6m ; p = 2 = -124 = -6m => m = 20.6666666667
What is equation?An equation is a mathematical formula that connects two assertions using the equal sign (=) to denote equivalence. In algebra, an equation is a mathematical statement that establishes the equivalence of two mathematical expressions. For instance, an equal sign separates the components 3x + 5 and 14 in the equation 3x + 5 = 14. A mathematical formula is used to explain the connection between two sentences on either side of a letter. Frequently, there is just one variable, which is also the symbol. for example, 2x - 4 = 2.
the equation is p= 126-6m
p = 2
-124 = -6m
m = 20.6666666667
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Multiple Choice: Triangle ABC has been reduced to create triangle XYZ. By what ratio has it been reduced?
A
12
3/4
2/3
1/2
1.5
18
15
B
80
Y
XL
12
10
Answer:
2/3
Step-by-step explanation:
Choose any of the similar sides and set up the ratio, then reduce to the simplest fraction:
12/18 = 4/6 = 2/3
8/12 = 4/6 = 2/3
10/5 = 2/3
Latisha is compiling a program for a video game.
For one part of the program they use the rule (x,y) → (x + 10, y - 6) to move a character on the screen.
(a) What output does the rule give when the input is (10,-5)? Show your work.
(b) What output does the rule give when the input is (-4,8)? Show your work.
The shifted coordinates for each of the following are (20,-11) and (6,2).
Coordinates are a pair of integers (Cartesian coordinates), or sporadically a letter and a number, that identify a certain place on a grid, also referred to as a coordinate plane. The x axis (horizontal) and y axis are the two axes that make up a coordinate plane (vertical).
Given, (x,y) → (x + 10, y - 6)
a) when the input is (10,-5) -
10 + 10 = 20
- 5 - 6 = - 11
(20,-11)
b) when the input is (-4,8) -
-4 + 10 = 6
8 - 6 = 2
(6,2)
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Quadrilateral JKLM is shown.
Suppose quadrilateral J´K´L´M´ is a reflection of JKLM in the line y = x. The coordinates of M´ would be : (_,_)
Suppose quadrilateral J''K''L''M'' is a rotation of JKLM 90° counterclockwise about the origin. The coordinates of J'' would be : (_,_)
The coordinates of M´ would be : (4, 1) after reflection across the line y = x.
The coordinates of J'' would be : (3, -1) after counterclockwise about the origin.
What is a transformation?A point is transformed when it is moved from where it was originally to a new location. Translation, rotation, reflection, and dilation are examples of different transformations.
The quadrilateral JKLM is shown in the given figure.
As per the given graph, we can see that
The coordinates of M would be : (4, 1)
Suppose quadrilateral J´K´L´M´ is a reflection of JKLM in the line y = x.
Then the coordinates of M´ would be : (4, 1)
The coordinates of J would be : (1, 3)
Suppose quadrilateral J''K''L''M'' is a rotation of JKLM 90° counterclockwise about the origin.
Under a counterclockwise rotation about the origin of 90 degrees
A coordinate ( x, y ) → ( y, - x ),
The coordinate J is (1, 3) and is translated using the rule
Then simply plug in the values of x and y which are x = 1 and y = 3
Thus (1, 3) → (3, -1)
Thus, the coordinates of J'' would be : (3, -1)
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The measures of two supplementary angles total 180 degrees. The measure of angle y is 65 degrees less than the measure of angle x. What are the measures of the angles?
The measure of angle x is 122.5 degrees. The measure of angle y is 57.5 degrees.
The measure of angle x is 115 degrees. The measure of angle y is 65 degrees.
The measure of angle x is 57.5 degrees. The measure of angle y is 122.5 degrees.
The measure of angle x is 65 degrees. The measure of angle y is 115 degrees.
Based on the definition of supplementary angles, the measures of the angles are:
Angle x = 122.5°
Angle y = 57.5°
What are Supplementary Angles?When two angles gives a sum of 180 degrees when they are added together, then the two angles are referred to as supplementary angles.
For example, if angle x and angle y are supplementary angles, it means that:
Measure of angle x + measure of angle y = 180 degrees.'
Given the following:
The measure of angle x = x degrees
The measure of angle y = x - 65 degrees.
Therefore, we have:
x + x - 65 = 180
2x - 65 = 180
2x = 180 + 65
2x = 245
2x/2 = 245/2
x = 122.5
Thus:
Measure of angle x = 122.5°
Measure of angle y = 180 - 122.5 = 57.5°
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Answer:
A
Step-by-step explanation:
ken added 5/8 cups more walnuts to the trail mix how many cups of Tremors does he have
Answer:
Please provide more information. Since you don't provide the original amount of walnuts used, we can't solve the problem.
In the triangle below, with right angle I, suppose that m angle G = (4x-16)° and m angle H= (3x+15)°.
Find the degree measure of each angle in the triangle.
Therefore , the solution of the given problem of triangle comes out to be the measure of each angle is 36,54 and 90.
What is a triangle and some of its properties?A triangle is a three-sided polygon in geometry that has three edges and three vertices. The fact that the internal angles of a triangle add up to 180 degrees is the most crucial aspect of triangles. Angle sum property of a triangle is the name of this property.
Here,
Using the angle sum property of triangle,
90+4x-16+3x+15=180.( Since its a right angle triangle)
7x+89=180
7x=91
x=13
Therefore, ∠G=4X-16=36 and ∠H=3x+15=54.
Hence, the measure of each angle is triangle is 36,54 and 90.
Therefore , the solution of the given problem of triangle comes out to be the measure of each angle is 36,54 and 90.
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Find the length of side
x to the nearest tenth.
Answer:
Step-by-step explanation:
Isosceles triangle (Same angle) means both sides are the same length, triangle is also right meaning you can plug values into Pythagorean theorem ([tex]a^2 + b^2 = c^2[/tex])
[tex]x^2+x^2 = 1^2\\2x^2=1\\x = \sqrt{\frac{1}{2} }\\x = 0.707...\\x=0.7[/tex]
Assuming all my math is right, this is your answer
Can somebody help ASAP? I will give lots of points
Three-part question:
Answer:
A- NQ,
B- 24,
C- 14+10=24
Please help answer these for 30 points pls
Answer:
please name the chapter
Anya is 3 years older than her brother,Cole. In 11 years,Cole will be twice Anya’s current age. Find their current age
By solving these equations, Cole is currently 27 years old, and Anya is 30 years old.
How does math work out age?A person's date of birth is compared to the date on which their age needs to be calculated as part of the age calculation process. The person's age is determined by deducting the person's birthdate from the given date. Age equals Given Date - Birthdate
Let x stand in for Anya's current age and y for Cole's present age.
Cole's older brother, Anya, is three years older. Hence:
x = y + 3
x - y = 3 (1) (1)
The total of their ages will be 79 in 11 years. Hence:
(x + 11) + (y + 11) = 79
x + y = 57 (2) (2)
Equations 1 and 2 are simultaneously solved to produce:
x = 30, y = 27
Cole is currently 27 years old, and Anya is 30 years old.
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Can exponential function have 1 as a base?
Yes, an exponential function can have 1 as a base.
An exponential function is a function of the form f(x) = a^x, where a is the base and x is the exponent. The base can be any real number, including 1.
When the base is 1, the exponential function is defined as f(x) = 1^x = 1 for any value of x. This function is a constant function that always equals 1.
It is important to note that when the base of an exponential function is less than 0, the domain of the function is all real numbers except for certain values of x.
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At a local pizza shop customers pay a set price for a large pizza plus an additional per topping ordered. A large pizza with 2 toppings would cost $13. 50, and a large pizza with 5 toppings would cost $15. 75
The cost price of large pizza is $12 and that of toppings is 0.75.
An equation is a mathematical statement with an 'equal to' symbol between two expressions that have equal values. For example, 3x + 5 = 15. There are different types of equations like linear, quadratic, cubic, etc.
In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
Let the cost of large pizza be x and that of toppings be y.
x + 2y = 13.50
x = 13.50 - 2y - (1)
x + 5y = 15.75 - (2)
substitute equation (1) in equation (2),
13.50 - 2y + 5y = 15.75
3y = 15.75 - 13.50
3y = 2.25
y = 2.25 / 3
y = 0.75
now, put the value of y = 0.75 in equation (1),
x = 13.50 - 2 × 0.75
x = 13.50 - 1.5
x = 12
Therefore, the cost price of large pizza is $12 and that of toppings is 0.75.
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What is the 2nd coordinate?
The second coordinate in a two-dimensional coordinate system is the y-coordinate, which indicates the vertical distance from the origin point (0, 0).
What is coordinates?Coordinate is a pair of numbers used to identify the position of a point in a plane or in space. It is mostly used in mathematics, science, and engineering. Coordinates are used to define locations on maps, to plot graphs, and to identify points on a two-dimensional plane. By knowing the coordinates of two points, one can calculate the distance between them.
The y-coordinate can be either positive, negative, or zero. The y-coordinate is also referred to as the “ordinate” or the “vertical coordinate”. The second coordinate is usually written as the number located at the top of the y-axis on a graph.
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Limit of (t^4-1/t^3-1) as t approaches 1
please help with my homework cant figure it out.
The figure is a regular polygon then the value of x is 21.
What is a regular polygon?
A regular polygon is a polygon that has all sides equal and each side subtends an equal interior angle at the center.
The sum of the interior angles of a polygon is
sum = 180° (n - 2)
n is the number of sides
Here n = 12, then
sum = 180° × 10 = 1800°
So the angle subtended by one side at the center is given as follows
Each of the 12 interior angles = 1800° ÷ 12 = 150
Then,
7x + 3 = 150
7x = 147
x = 21
Hence, If the figure is a regular polygon the value of x is 21.
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Challenge Emily and Andy each go to a hardware store to buy wire. The table shows the cost y in dollars for x of the wire they need. Emily needs 22 feet of wire. Andy needs 11 yards of the wire. How much will each of them spend on wire?? please answer quickly!!!
The amount of money each of them spends on the wire will be $23.76 and $35.64, respectively.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
Challenge Emily and Andy to each go to a home improvement shop to purchase wire. The table shows the expense y in dollars for x of the wire they need.
y = kx
9 = 100k
k = 0.09
Then the question is given as,
y = 0.09 · x
Emily needs 22 feet of wire. Then the cost is given as,
y = 0.09 · (22 × 12)
y = $23.76
Andy needs 11 yards of the wire. Then the cost is given as,
y = 0.09 · (11 × 3 × 12)
y = $35.64
The amount of money each of them spends on the wire will be $23.76 and $35.64, respectively.
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The complete question is given below.
Find the distance between the points (8, 1) and (2, 9).
Round decimals to the nearest tenth.
Answer:
10
Step-by-step explanation:
using the distance formula
Does 5 5 and 7 make a right triangle?
The base of the triangle 7 can be divided in half by a line of symmetry of the isosceles triangle, which will bisect the vertex angle. This creates two right triangles: Each with a base of 3.5 and a hypotenuse of 5.
What is meant by isosceles triangle?
A triangle with two equal sides is known as an isosceles triangle in geometry. Both having exactly two sides of equal length and having at least two sides of equal length are acceptable specifications, with the latter version containing the equilateral triangle as an exception.The faces of bipyramids, the golden triangle, the isosceles right triangle, and some Catalan solids are all examples of isosceles triangles.Isosceles triangles have been studied mathematically since the Babylonian and Egyptian periods.Isosceles triangles have been utilized as ornamentation since the dawn of time and are widely seen in architecture and design, such as in building pediments and gables.To learn more about isosceles triangle refer to
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The base of triangle 7 can be bisected by the line of symmetry of the isosceles triangle that bisects the apex angle. This creates two right triangles.
Each has a base of 3.5 and a hypotenuse of 5.
What does isosceles triangle mean?A triangle with two equal sides is called an isosceles triangle in geometry.
Both exactly 2 equal sides and at least 2 equal sides are permissible specifications, with the exception of equilateral triangles in the latter version. The bipyramid, the golden triangle, the isosceles right triangle, and the face of the Catalan solid are examples of isosceles triangles.
Isosceles triangles have been studied mathematically since Babylonian and Egyptian times.
Used as an ornament since the dawn of time, isosceles triangles are widely used in architecture and design, including in the construction of pediments and pediments.
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than 44 an t& cent.
14. It cost the Wilson children $55 to make lemonade. How many
glasses must they sell at 75% each to make a profit?
Answer:
pro
Step-by-step explanation:
proproproprohope th uh s was helpfulKylie leans a 30-foot ladder against a wall so that it forms an angle of 74° with the ground. What’s the horizontal distance between the base of the ladder and the wall?
8.269 feet is the horizontal distance between the wall and the ladder's base.
What is the distance?Distance is a measurement of how far apart two things or points are, either numerically or occasionally qualitatively.
The distance can refer to the physical length in physics or to an estimate based on other factors in ordinary language (e.g. "two counties over").
The term is frequently used metaphorically to refer to a measurement of the difference between two common pieces (such as statistical distance between probabilistic or edit distance between strings of text) or a degree of separation, as spatial cognition is a rich source of conceptual metaphors in human thought (as exemplified by the distance between people in a social network).
So, using a right-angled triangle's trigonometry:
(x = required distance)
cos 74 = x / 30
x = 30 cos 74
x = 8.269 ft
Therefore, 8.269 feet is the horizontal distance between the wall and the ladder's base.
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A car traveled a distance of 192 miles from New York go a small town in Pennsylvania in 3 hours. Find the speed of the car.
Answer: 64 miles per hour
Step-by-step explanation: 192 divided by 3= 64
What is called a complex number?
A complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is the imaginary unit, which satisfies the equation i2 = -1.
What is complex number?
The number a is the real part of the complex number and b is the imaginary part. A complex number is said to be a sum of a real number and an imaginary number. Complex numbers are used in many branches of mathematics, including calculus, linear algebra, quantum mechanics, and electrical engineering.
They are also used in engineering, physics, chemistry, and other scientific fields. Complex numbers are useful in many real-world applications, such as finding the roots of a polynomial equation or solving systems of linear equations. Complex numbers can also be used to represent points in the plane and can be used to model phenomena in the physical world, such as electrical circuits and waveforms.
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PLEASE HELP!!! I NEED HELP WITH MY HOMEWORK!!!!
(GEOMETRY)
WILL MARK BRAINLIEST!!!!
The right triangle in marked question number 3 have the value of u = 2 and v = √2 using the trigonometric ratio of sine and cosine of the angle 45°.
What are trigonometric ratiosThe trigonometric ratios involves the relationship of an angle of a right-angled triangle to ratios of two side lengths. Basic trigonometric ratios includes; sine cosine and tangent.
Considering the angle 45° for the right triangle, recall that sin 45° and cos 45° are generally both equal to √2/2
sin 45° = √2/u {opposite/hypotenuse}
√2/2 = √2/u
u = √2/√2 × 2 {cross multiplication}
u = 2
cos 45° = v/u {adjacent/hypotenuse}
√2/2 = v/2
v = 2/2 × √2
v = √2
Therefore, the value of u = 2 and that of n = 10, using the trigonometric ratio of sine and cosine of the angle 45° for the right triangle.
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