The mean absolute deviation (MAD) is a measure of forecast accuracy that is used to detect random factors in a data set. It is calculated by taking the mean of the absolute differences between the actual values and the forecast values.
The MAD can be used to eliminate forecast errors by identifying and removing random factors that are causing the errors. It is not typically used to estimate the trend line or measure forecast accuracy. Mean absolute deviation (MAD) is a measure of the variability or dispersion of a data set. It is calculated by taking the mean of the absolute differences between the individual values in the data set and the mean of the data set.
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What ratio does the point 1 a divided the join of (- 1/4 and 4 1 )? Also find the value of a?
Using the provided values for the points and the slope, With the formula of slope we can calculate the value of a = 14/5 =2.8 and the ratio as
1:1.49 .
What do you mean by slope?In mathematics, a line's slope, also known as its gradient, is a numerical representation of the line's steepness and direction. Divide the difference in elevation between two points by the distance between them to find the percent slope, then multiply the result by 100. The term "rise" refers to the difference in elevation between two sites. The run is the separation between the points. Percent slope is therefore equal to (rise / run) x 100.
What do you mean by ratio?A ratio in mathematics demonstrates how many times one number is present in another. For instance, if a dish of fruit contains eight oranges and six lemons, the ratio of oranges to lemons is eight to six. Similarly, the ratio of oranges to the total amount of fruit is 8:14, while the ratio of lemons to oranges is 6:8.
point (1,a) divided line joined by (-1,4) and (4,1).
Since, The slope between these points are same as they all line in a single line, we can ,
[tex]\frac{a-4}{1+1} = \frac{1-a}{4-1}[/tex]
3a-12=2-2a
5a=14
a=14/5 =2.8.
distance between (-1,4) and (1,2.8),
[tex]d1 = \sqrt{(1--1)^2 +(2.8-4)^2}\\=\sqrt{5.44}\\=2.33[/tex]
distance between (1,2.8) and (4,1),
[tex]d2= \sqrt{(4-1)^2 + (1-2.8)^2}\\=\sqrt{12.24}\\=3.49\\\\[/tex]
ratio = d1/d2
= 1: 1.49
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How do you know if a function is positive or negative?
A function is positive if the output values are greater than the input values and negative if the output values are less than the input values.
To determine if a function is positive or negative, you must first look at the output values of the function. If the output values are greater than the input values, then the function is positive. This means that the output values increase as the input values increase. Conversely, if the output values are less than the input values, then the function is negative. This means that the output values decrease as the input values increase. For example, if a function has an input value of 3 and an output value of 5, then the function is positive because the output is greater than the input. On the other hand, if the same function had an output value of 1, then the function would be negative because the output is less than the input. In summary, a function is positive if the output values are greater than the input values and negative if the output values are less than the input values.
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What is the set of all x values?
The range is the set of all "y" values in an ordered pair, while the domain is really the set of all "x" values.
What is defined as the term called domain?Keep in mind which ordered pairs are represented by the following symbols: (x, y).
List all the x values first from relation to determine the domain when examining a set of ordered pairs. List each of the y values first from ordered pairs to determine the range. Repeated values that fall inside the domain or range need only be listed once. Each x value in a relation must have a unique value for the y value for it to be a function.A collection of ordered pairs isn't a function if an x value has had more than one y value associated with it, as as in the relation (4, 1), (4, 2), where the x value of 4 has y values of 1 and 2.
Thus, If there is only one y-value for every x-value, then the relation is called a function.
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Why does AAS congruence work?
Angle-Angle-Side is abbreviated as AAS. The triangles are said to be congruent when two angles and a non-included side of one triangle match the corresponding angles and sides of another triangle. AAS congruence may be demonstrated with a few simple methods.
When two triangles in geometry are the same size and shape, they are said to be congruent. The Angle-Angle-Side (AAS) congruence theorem is one of several approaches to demonstrate that two triangles are congruent.
According to the AAS congruence theorem, triangles are congruent if two angles and the side that connects them in one triangle are congruent with two angles and the side that connects them in another triangle. This is how this theorem is expressed:
If ∠A = ∠E, ∠B = ∠F, and AB = EF, then ∆ABC ≅ ∆DEF
In other terms, triangles ABC and DEF are congruent if two angles and the side between them in triangle ABC are equivalent to two angles and the side between them in triangle DEF.
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If g(x) = - 4x^2 - 3x + 2, determine g(-2).
Show your work.
Answer:
g(-2) = -8
Step-by-step explanation:
If [tex]g(x) = - 4 x^2 - 3x +2[/tex], determine g(-2):
[tex]g(-2) = - 4 (-2)^2 - 3(-2) +2\\g(-2) = - 4 (4) - (-6)+2\\g(-2) = -16 + 6 + 2 \\[/tex]
g(-2) = -8
Snooty had to solve the following
equation for x:
x² = 64
Someone told Snooty there are actually
2 solutions! This confused Snooty. Can
you explain to Snooty why there are 2
solutions for x in this equation?
Type a response
0.
Answer:
8, -8
Step-by-step explanation:
There are 2 answers for the solution because x² = 64 can equal 8, and -8. It can equal 8 because 8 x 8 = 64. It can also equal -8 because -8 x -8 is a positive 64.
maths question on triangles
Answer:
The height (AE) is 20 cm
Step-by-step explanation:
Volume = 1/3(area of the base) height
600 = 1/3(18 x 5)h
600 = 30h Divide both sides by 30
[tex]\frac{600}{30}[/tex] = [tex]\frac{30h}{30}[/tex]
20 = h
What is the equation of the line of symmetry for the parabola represented by the equation y = −2x^2 − 16x − 27?
Enter your answer as the correct equation, like this: x = 42
Answer: x=-4
Step-by-step explanation:
You can find this algebraically by either solving for the y-value of the vertex or by adding the two zeros and dividing by two.
In this case: (-5.581, 0) and (-2.419)
-5.581 + -2.419
= -8
-8/2 = -4
What is the best approximation of the solution to the system to the nearest integer values?
(7, 1)
(7, 0)
(1, 7)
(0, 6)
Answer:
7,0
Step-by-step explanation:
Write an equation for the line in slope-intercept form
Answer: y=2/5x +5
Step-by-step explanation: slope is 2/5 y intercept is 5
If the distance between the points A(2, -2) and B(-1, x) is equal to 5, then the value of x is: (a)2 (b)-2 (c)1 (d)-1
Answer:
(a) 2
Step-by-step explanation:
We can assume this is a 3-4-5 triangle from the two given sides, 5 and 3(2--1) so then we know the y difference of the y coordinate should be + or - 4 from -2 giving us two solutions of 2 and -6 since this is a multiple choice and a is 2 he answer is 2
find an equation of the tangent line to the curve at the given point. y = 4ex cos(x), (0, 4)
The equation of the tangent line to the curve at the given point, y = 4ex cos(x), (0, 4) as calculated is y' = 0.
In order to find the equation we will have to differentiate y = 4ex cos(x)
On differentiating we get the differential as ,
y' = - 4eˣsin(x)
given the value of x as 0 and y as 4
y' = -4e⁰sin(0)
= 0 because sin( 0 ) = 0
Therefore ,the required equation is , y' = 0.
Differentiation is a technique which is used to find the derivative of a function . Differentiation is a mathematical procedure it determines the rate of change of a function based on one of its variables.
Other than differentiation calculus also has a branch known as integration.
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Is cleaning the measuring instrument not necessary?
It is necessary to clean the measuring instrument the moving parts of the measuring device may be harmed if airborne dust or dirt gets inside of it. Additionally, if any foreign objects are present between the measurement target and the measuring device, precise measurements may be affected.
what is measuring instrument?A measuring instrument is a tool used to quantify anything tangible. The act of obtaining and comparing physical amounts of actual objects and occurrences is known as measuring in the physical sciences, quality control, and engineering. Vernier calipers, micrometers, dial gauges, gauges of various types, bubble levels, protractors, and rulers are some of the primary goods that fall under the category of measurement instruments. These equipment are employed in the production process and for quality assurance.
It is necessary to clean the measuring instrument the moving parts of the measuring device may be harmed if airborne dust or dirt gets inside of it.
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How do you find the total from 1 to 100?
The total number from 1 to 100 is found by addition
What is addition in math ?
Combining things and counting them as one big group is done through addition.
In math, addition is the process of adding two or more integers together.
Addends are the numbers that are added, and the outcome of the operation, or the final response, is referred to as the sum.
In the problem the addends are the numbers 1 2 3 4 5 6 .......97 98 99 100
The applying the addition operation the sum is calculated to be 5050. calculator will make the operation easier
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Calculating length of the curve
Can somebody give me a detailed description how we did the last three steps?
I don't see the picture. Can you send it in the message.
27) An amusement park ride, the Demon Drop, includes a drop of close to 100 feet. Use the given equation to
approximate the time (seconds) that it takes the dropped object to fall a distance of about feet. Solve for "t" to
the nearest tenth.
Could you please find X and show me how
Answer:
[tex]x=13\cos 25^{\circ}[/tex]
Step-by-step explanation:
[tex]\cos 25^{\circ}=\frac{x}{13} \\ \\ x=13 \cos 25^{\circ}[/tex]
When two angles and a non-included side of one triangle are congruent to the corresponding pieces of another triangle?
The correct answer is option b) AAS
What is meant by triangle ?A triangle is a polygon with three vertices and three sides. The angles of the triangle are formed by the connection of the three sides end to end at a point.Polygons of the form with three sides and three vertices are called triangles. Three straight sides make up the two-dimensional figure shown here. An example of a 3-sided polygon is a triangle. Tri-, which means "three," and angulus, which means "angle or corner," are the roots of the Latin word triangulus, which means "three-cornered" or "having three angles."According to the AAS congruence theorem, if two angles and the non-included side of one triangle are congruent with the corresponding components of another triangle, then the two triangles are congruent.
Therefore, option B is the correct answer.
"AAS congruence" theorem an be used to prove that the triangles are congruent .
The complete question is:
Two angles and the non-included side of one triangle are congruent to the corresponding parts of another triangle. Which congruence theorem can be used to prove that the triangles are congruent?
a) SSS
b) AAS
c) SAS
d) HL
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Look at this table:
13
15
19
-19
-9
Is this relation a function?
yes
no
Yes, the given Relation is a Function.
How do you figure out if a relation is a function?Relation: It belongs to the Cartesian product's subgroup. Or just a lot of points (ordered pairs). In other words, the ordered pair collection, where the ordered pair is made up of an object from each set, is used to define the relationship between the two sets.
To Analyze a relationship between two values to see if it can be classified as a function:
1)Choose the input values.
2)Determine the results.
3)Consider the connection to be a function if each input value results in just one output value. Do not classify the relationship as a function if any input value results in two or more outputs.
In the given table all ordered pairs have unique x values so the given relation is a function.
Yes, the given Relation is a Function.
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find and sketch the domain of the function. f(x, y, z) = ln(144 − 9x2 − 16y2 − z2)
The domain of the function f(x, y, z) = ln(144 − 9x² − 16y² − z²) is x ∈ (-4, 4), y ∈ (-3, 3) and z ∈ (-12, 12). It forms an ellipsoid.
Domain of a function is the set of all values possible for the input parameters for real output parameter or output parameter in given range.
f(x, y, z) = ln(144 − 9x² − 16y² − z²)
For f(x, y, z) to be real, 144 − 9x² − 16y² − z² should be greater than 0. So,
144 − 9x² − 16y² − z² > 0
9x² + 16y² + z² < 144
x²/ 4² + y²/ 3² + z²/ 12² < 1
So the domain is an ellipsoid.
Therefore x ∈ (-4, 4)
y ∈ (-3, 3)
z ∈ (-12, 12)
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How many solutions does quadratic equation 2x² 7x 5 0 have?
Step-by-step explanation:
I cannot read what equation you wrote.
but it does not matter.
a quadratic equation has always 2 solutions.
as a cubic equation has always 3 solutions.
and so on.
sometimes they can be identical like for 0 = x² (with 0 as solution 2 times).
and sometimes they can be imaginary like in -1 = x².
but there always are 2 solutions for a quadratic equation.
for example with normal numbers :
1 = x²
the solutions are sqrt(1) = ±1 = +1 and -1.
What is an example of perpendicular equations?
An example of perpendicular equations are:
f(x)=2x+4
g(x)=[tex]\frac{-1}{2}\\[/tex]x+2
A straight line passing through a point is called a perpendicular line. It forms a 90-degree angle with a specific place where the line passes. The need for determining the perpendicular line is coordinates and a line equation.
Think about a line with the equation ax + by + c = 0 and the coordinates (x1, y1). The slope should be a/b. Let m1 and m2 represent the slopes of two lines; their product will be -1 if the lines are perpendicular to one another.
A line's slope in mathematics is defined as the ratio of the change in the y coordinate to the change in the x coordinate.
Both the net change in the y-coordinate and the net change in the x-coordinate are denoted by y and x, respectively.
m = Δy/Δx = dy/dx = change in y/change in x
where "m" represents a line's slope.
Additionally, the slope of the line may be shown as
tan θ = Δy/Δx
A line's slope often indicates the steepness and direction of the line.
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Think about a line with the equation ax + by + c = 0 and the coordinates (x1, y1). The slope should be a/b. Let m1 and m2 represent the slopes of two lines; their product will be -1 if the lines are perpendicular to one another.
A line's slope in mathematics is defined as the ratio of the change in the y coordinate to the change in the x coordinate.
Both the net change in the y-coordinate and the net change in the x-coordinate are denoted by y and x, respectively.
m = Δy/Δx = dy/dx = change in y/change in x
where "m" represents a line's slope.
What does it mean to apply a function?
Function application is the process of applying a function to a domain-specific argument in order to get the relevant value from the function's range.
What does a function mean?An expression, rule, or law in mathematics that specifies the relationship between an independent variable and a dependent variable (the dependent variable). Apply is a function in mathematics and computer science that applies arguments to a function.An example of a rule is a function, which produces one output for a single input.
Y=X2 is an illustration of this. You only get one output for y if you enter anything for x. The fact that x is the input value leads us to say that y is a function of x. I submitted written applications to a number of businesses. For this position, a high school graduation is required. Teenage dropouts are not required to apply. Apply a second coat of paint to the wall once the first one has dried and been thinly applied.
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bramdpm owns nearly 2 times as many cds as ingrid.brandon owns 56 cds.write an equation and use it to estimate the number n of cds ingrid owns.
The number of CDs that Ingrid owns will be 28.
What is the equation's answer?
A direct consequence is the distribution of weights to the significant variables that result in the calculation's optimal.
Nearly twice as many CD promotions are in Brandon's possession than they are in Ingrid's. Brandon says he has 56 CDs.
Let 'x' represent Ingrid's CD collection. Then Brandon will have twice as many CDs.
The equation is then presented as,
Then the equation is given as,
2x = 56
Simplify the equation, then we have
2x = 56
x = 56 / 2
x = 28
The number of CDs that Ingrid owns will be 28.
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Saha ue 3 teapoon of hot chocolate mix for every 8 ounce of milk. How many teapoon of hot chocolate mix doe he need for 48 ounce of milk?
Saha uses 3 teaspoons of hot chocolate mix for every 8 ounces of milk. for 48 ounces of milk, he needs 18 teaspoons of hot chocolate.
The problem can be solved using unitary method or using ratio.
- Unitary method
Using this method, first, compute how many teaspoons of chocolate needed for 1 ounce of milk.
8 ounces of milk need 3 teaspoons of hot chocolate. Hence,
1 ounce of milk need 3/8 teaspoons of hot chocolate
48 ounce of milk need 3/8 x 48 = 18 teaspoons of hot chocolate
- Using ratio
Let p = number of teaspoons of hot chocolate needed for 48 ounces of milk. Then,
3 : 8 = p : 48
8p = 3 x 48
p = 3 x 48/8 = 3 x 6 = 18 teaspoons
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Will mark brainliest the first answer with explanation!!!
Consider a game in which each play costs one nickel (5¢). During each play, the game dispenses a coin to the player to keep. The game machine contains equal numbers of pennies (1¢), nickels, dimes (10¢), and quarters (25¢). The nickels that the player inserts do not go into the same pool of "reward" coins. What is the expected profit, in cents, for a player who plays five games in a row?
The expected profit, in cents, for a player who plays five games in a row, is given as follows:
26.25 cents.
How to obtain the expected profit?The distribution that models the profit of a player for a single game is given as follows:
P(X = -4 cents) = 0.25. -> pays 5 cents, wins 1 cent, loses 4 cents.P(X = 0 cents) = 0.25. -> pays 5 cents, wins 5 cents.P(X = 5 cents) = 0.25. -> pays 5 cents, wins 10 cents.P(X = 20 cents) = 0.25. -> pays 5 cents, wins 25 cents.The expected value of a discrete distribution is calculated as the sum of each outcome multiplied by it's respective probability, hence:
E(X) = -4 x 0.25 + 0 x 0.25 + 5 x 0.25 + 20 x 0.25 = 5.25 cents.
For five games, the expected value is obtained as the multiplication of the expected value of a single game by five, hence:
5E(X) = 5 x 5.25 = 26.25 cents.
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What are 2 examples of arithmetic sequences in real life?
Stacking chairs and sitting around table are examples of arithmetic sequence in real life
What is simple arithmetic?
The foundational subject in mathematics is arithmetic, which covers operations with numbers. These include multiplication, division, addition, and subtraction. One of the key areas of mathematics, arithmetic serves as the cornerstone for students studying the topic of mathematics.
How is arithmetic sequence used in daily life?
There are numerous applications for arithmetic sequences in daily life. The clock, for instance, demonstrates properties of an arithmetic sequence. The standard deviation of a clock's time is 1. Other examples of arithmetic sequences can be seen in daily life, such as our age.
Among these there are many other examples of arithmetic sequence is real life like fencing and perimeter examples.
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How many solutions does the pair of equations y 0 and y =- 5 have class 10?
If there were two equation, one on top of the other, there would be infinitely many solutions. but here no solution
If there were two lines that intersected at one point, there would be one solution.
y=0 and y=-5 don't have any solutions. When you ask if a pair of equations have a solution, that means there is an intersection of the equations. The 2 equations will meet somewhere, and that is the solution. To find the solution, you set the equations equal to each other.
0≠-5
It is obvious that 0 and -5 are not equal to each other. Therefore, there is no solution. Also, y=0 and y=-5 are horizontal lines that are parallel to each other. They will never meet, which means there will be no intersection. No intersection means no solutions
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How do you write 9 more than a number?
9 more than a number in mathematical expression is written as n+9.
Any two integers can be compared using the greater than and less than symbols. Greater than and less than symbols are used to indicate whether one number is greater than or less than another. The greater than sign (>) is used when the first number exceeds the second number. The less than sign (<) is used when the first number is less than the second number.
The quantity on the left of the > sign is the greater quantity. It could be a variable or expression [like 10x-2 > 50].
Let the number be n,
More than signifies addition. Therefore, the expression would be n+9.
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Is it true a 0 or 1?
Therefore, In the binary number 0 comes out to be false and 1 comes out to be true.
Describe a binary number.Binary code, the foundation of everything binary utilised in computing systems, provides a numbering system in which there are only two potential values for each digit: 0 or 1.
Here,
In this case, binary logic has two states: false and true. "binary" – It's critical that there be two of them.
If you want to, you can refer to them as 0 and 1, yes and no, or off and on if you're an electrical engineer. They function as intended.
Therefore, In the binary number 0 comes out to be false and 1 comes out to be true.
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