If both variables tend to deviate in the same direction (both go above their means or below their means at the same time), then the covariance will be positive.
What Is Covariance?
The direction of the link between the returns on two assets is measured by covariance. Asset returns move together when the covariance is positive, and inversely when the covariance is negative.
It is calculated by analyzing at-return surprises (standard deviations from the expected return) or multiplying the correlation between the two random variables by the standard deviation of each variable.
Types of Covariance:-
This link is determined by a covariance value, either positive or negative.
When two variables have a positive covariance, it means that they frequently tend to be higher or lower together.When the estimated covariance is less than zero, it means that there is an inverse link between the two variables.Covariance Calculated:-
Covariance = Σ[tex][ ( Return_{abc} - Average_{abc} ) * ( Return_{abc} - Average_{abc} ) ][/tex]÷ [ Sample Size - 1 ].
Therefore, the both variables tend to deviate in the same direction, then the covariance will be positive.
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hellppppp meeee pleasseee
Answer: -1/4
Step-by-step explanation:
Answer: the answer to your question I believe is d= -1/4 = -0.25
Your family decides to go to the Fox Theater to watch a
musical. There is valet parking (where someone parks your
car for you) available across the street. Your dad decides to
leave a tip of 15% to the valet person. The cost of parking
is $35. How much tip will he leave?
The cost of tip will he leave for the valet person is, $5.25.
What is mean by Percentage?A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.
Given that;
Your dad decides to leave a tip of 15% to the valet person.
And, The cost of parking is $35.
Here, The cost of parking is $35.
Hence, The cost of tip for the valet person = 15% of $35
= 15/100 × $35
= $5.25
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Determine the value of y, if x is 5.
y = x² - 6
Answer:
19
Step-by-step explanation:
if x=5
y=x^2 - 6
y= 5^2 - 6
y= 25- 6
y=19
Find the domain and range of the function:
fx)=-5-x-3
Domain:
Range:
On solving the provided question we can say that the domain and Range of algebraic linear equation is all real number.
What is the scope and domain?Range and Domain. The range of values that we are permitted to enter into our function is known as the domain of a function. The x values for a function like f make up this set (x). A function's range is the collection of values it can take as input. After we enter an x value, the function outputs this sequence of values. In mathematics, a real number is a quantity that may be represented by an endless number of decimal expansions. In contrast to the natural numbers 1, 2, 3,... that result from counting, real numbers are utilized in measurements of continuously altering quantities such as size and time.
f(x) = 5 - x - 3
Domain is all real number.
and Range is also all real number.
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The graph and table show the total cost of memberships compared to the number of months you are a member at two different gyms, EZ Fitness and Buff Up Gym. Use the information to answer Parts A-B.
Alegbra I (Freshman-highschool)
EZ Fitness shows a monthly cost of $20 dollars per month. Buff Up Gym membership shows a monthly membership cost of $25 dollars per month.
How to find the slope of linear equation?
The slope between 2 coordinates can be found using the formula;
Slope = (y₂ - y₁)/(x₂ - x₁)
For the Buff Up Gym, we will pick the coordinates;
(2, 50) and (4, 100)
Thus;
Slope = (100 - 50)/(4 - 2)
Slope = $25 per month
For the function table for EZ Fitness, we pick two coordinates; (1, 20) and (2, 40). The slope is;
Slope = (40 - 20)/(2 - 1)
Slope = $20 per month
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Which phrase represents this expression? (30 - 10) × 5
A. 5 times the difference of 30 and 10
B. 5 times the difference of 10 and 30
C.the difference of 30 and the product of 5 times 10
D.the difference of the product of 5 times 10 and 30
Answer:
Step-by-step explanation:
A - Since there are parenthesis on 30 and 10, you would want to find the difference between 30 and 10 first, and then multiply it by 5, hence getting you 5 times the difference of 30 and 10.
Points (-4,-8) and (-2,-5) fall on a line. Calculate the y-intercept of the line. What is the y-intercept?
Answer:
y-intercept: -2
Step-by-step explanation:
The Y-intercept is when x = 0. So, to find the y-intercept we just need to put in 0 for x and get the answer of -2. So, the y-intercept is located at (0, -2)
what is the slope of a line that goes through the points (-5,-4) and (-2,-5).
Answer:
-1/3
The Slope
Slope is a measure of steepness of a line. In Algebra 1, It is how much the y-value changes when the x-value increases by 1.
Slope Formula:
[tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Plug in your points accordingly to find the slope.
Q)What is the slope of a line that goes through the points (-5,4) and (-2-5)
1) To solve, first find your y-values and x-values. y-values are the second value in the coordinate form and a measure of height on a 2D coordinate plane. x-values are the first value in coordinate form and a measure of horizontal distance on a 2D coordinate plane.
(x,y)
y-values: -4, -5
x-values: -5, -2
2) Plug into the formula listed above.
[tex]\frac{-5-(-4)}{-2-(-5)}[/tex]
Simplify.
[tex]-\frac{1}3}[/tex]
Your slope is -1/3.
Answer:
-1/3
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-5-(-4))/(-2-(-5))
m=(-5+4)/(-2+5)
m=-1/3
What are the 7 rules of exponents?
The 7 rules of exponents are:
Product Rule: When multiplying two numbers with the same base, add the exponents. For example, [tex]a^m * a^n = a^{(m+n)}[/tex]Quotient Rule: When dividing two numbers with the same base, subtract the exponents. For example, [tex]a^m / a^n = a^{(m-n)}[/tex]Power Rule: When raising a power to a power, multiply the exponents. For example, [tex](a^m)^n = a^{(m*n)}[/tex]Zero Exponent Rule: Any non-zero number raised to the power of 0 is equal to 1. For example, [tex]a^0[/tex] = 1, where a is not equal to 0Negative Exponent Rule: When a number is raised to a negative exponent, it is the same as the reciprocal of the number raised to the positive exponent. For example, [tex]a^{-n}[/tex] = 1/[tex]a^n[/tex]One Exponent Rule: When a number is raised to the power of one, it stays the same. For example, [tex]a^1[/tex] = aZero Exponent Rule: Any number raised to the power of 0 is equal to 1. For example, [tex]a^0[/tex] = 1
It's worth noting that these rules are only valid for real numbers, with the exception of the zero exponent rule, which is valid for any number except for zero. Also, some rules may have restrictions such as the Negative exponent rule, where the base cannot be zero.
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Kayden has a collection of 120 coins. How many coins represent 5% of his collection?
Since , solution of percentage problem is Kayden has a collection of 120 coins, the number of coins that represent the 5% of his collection is 6.
What is a percentage?A percentage is a way to express a number as a fraction of 100.To calculate percentage increase, subtract the original value from the new value and divide by the original value. To calculate percentage decrease, subtract the new value from the original value and divide by the original value.
Here,
As given by the question , the total number ko coins Kayden has in his collection is , 120 coins.
To know how many of his coins represent 5%, we can calculate ,
5% of 120 coins
= 5/100 * 12
= 6 coins
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What are the signs of the first and second coordinates of a point in quadrant II?
The signs of the first and second coordinates of a point in quadrant II are negative.
To determine the signs of the coordinates of a point in quadrant II, we can use the following formula:
Sign of coordinate 1: (-1) * (x-axis)
Sign of coordinate 2: (-1) * (y-axis)
For example, if we need to determine the signs of the coordinates of the point (4, -5) in quadrant II, we can use the formula above. The sign of the first coordinate is (-1) * (+4), which is -4. The sign of the second coordinate is (-1) * (-5), which is +5. Therefore, the signs of both coordinates of the point (4, -5) in quadrant II are negative.
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Which description best matches the graph below? Please explain why you chose the answer. I will mark you brainliest.
Gill walks for a minute away from home for several minutes, and then turns toward home and walks for a few minutes. He stops when he knows and they talk for a few minutes. Then he starts walking away from home.
Hence option C is correct.
What is a graph?
In discrete mathematics, and more specifically in graph theory, a graph is a structure consisting of a set of objects, some of which are "related" in some way. The items correspond to mathematical abstractions known as vertices, and each pair of connected vertices is known as an edge.
Given graph represents the y-axis is the distance from home and the x-axis is the number of minutes.
There are 4 straight lines in the graph
The first line is increasingly and represents Gill walking away from home.
The second line is decreasing and represents Gill walking toward home.
The third line is parallel to x-axis. It means he stands a point for a few minutes.
The fourth line is increasingly and represents Gill walking away from home.
Hence option C is the correct option.
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How do you find out if a number is a multiple of 8?
If the last three digits of a number are divisible by 8, then the number is completely divisible by 8. So we can check the last three digits of a number to know whether they are a multiple of 8.
A multiple of 8 is a number that can be evenly divided by 8 without a remainder. To determine if a number is a multiple of 8, you can divide it by 8 and check if the quotient is an integer (a whole number with no remainder).
For example, to check if the number 96 is a multiple of 8, you can divide 96 by 8 and the quotient is 12, which is an integer, so 96 is a multiple of 8.
Another way to check if a number is a multiple of 8 is to check if the last three digits of the number are 000 or divisible by 8. This is because 8 is a power of 2 (2^3=8), and any number that is a multiple of 8 will be divisible by 2^3, which means it must have 3 trailing zeroes.
A more general method to check if a number is a multiple of any number is by using the modulo operator, which returns the remainder of a division. If x is a multiple of y, then x mod y = 0. Therefore, you can use x % 8 == 0 to check if x is a multiple of 8.
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Why is it called midpoint?
As the word himself says, "midpoint" means "the point in the middle or center". Finding a midpoint is not too hard and has applications in many areas of statistics, from confidence intervals to sketching distributions, to means.
To Find the Midpoint Between Two Numbers.
If the numbers are given, then the midpoint is become the average of the two numbers. To calculate or answer the midpoint, we first add them up and then divide the result by 2. The formula is as follows:
Let x and y be two numbers. So, the midpoint is:
M = x + y/2
A midpoint is a point that lying between two points and is in the center of the line joining the two points.
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Rename 1 foot with an equivalent factor in inches.
Answer:
12 inches
Step-by-step explanation:
1 foot = 12 inches
(12 inches)/(1 foot) = 1
1 foot × (12 inches)/(1 foot) = 12 inches
A certain blogger has 460 followers on his social media accounts, but is losing followers at a rate of 6 people per day based on his comments. Another blogger has 128 followers on her social media accounts and gains an average of 10 new followers per day.
Which equation can be used to find d, the number of days it will take before both bloggers have the same number of followers?
21 days it will take before both bloggers have the same number of followers
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given a blogger has 460 followers on his social media accounts, but is losing followers at a rate of 6 people per day based on his comments.
y=460-6d
Where d represents the number of days
Another blogger has 128 followers on her social media accounts and gains an average of 10 new followers per day.
y=128+10d
We need to find equation to find the number of days it will take before both bloggers have the same number of followers
460-6d=128+10d
Add 6d on both sides
460=128+16d
Subtract 128 on both sides
460-128=16d
332=16d
d=20.75=21
Hence, 21 days it will take before both bloggers have the same number of followers
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Algebra 2, I remember doing this but i’m confused bc I remember like (f)g)(x) something like that so do I multiply or what?
The (g·g)(t) of the function is (g·g)(t) = 16t - 15
How to find (g·g)(t) of the function?A function is an expression, rule, or law that defines a relationship between an independent variable and a dependent variable
Since g(t) = -4t + 5
What (g·g)(t) means is that you should replace t with the value of g(t) (i.e. -4t + 5) in the same equation. That is:
(g·g)(t) = g(g(t))
(g·g)(t) = -4(-4t + 5) + 5
(g·g)(t) = 16t - 20 + 5
(g·g)(t) = 16t - 15
Thus, the value of g·g)(t) is 16t - 15
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Help, please! I can not figure out this question.
The product of the given expression is option C. 6x^3 - 33x^2 + 45x - 6.
Product of numbers in brackets.The product of two or more numbers implies the final value that would be derived when the numbers are multiplied with each other.
The given expression in the question involves the expansion of brackets.
Thus it can be solved as;
(3x - 6) (2x^2 - 7x + 1)
Considering the first bracket, the first term is 3x and second term is -6. To solve the question thus require to first expand the second bracket by 3x, then by -6 to have;
(3x - 6) (2x^2 - 7x + 1) = 6x^3 - 21x^2 + 3x - 12x^2 + 42x - 6
= 6x^3 - 33x^2 + 45x - 6
Therefore, the product of given brackets is 6x^3 - 33x^2 + 45x - 6. Thus option C.
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What is the formula of mirror image?
A mirror equation is an equation relating object distance and image distance with focal length. It is also known as the mirror formula.
1/f= 1/u + 1/v.
u is the Object distance
v is the Image distance
f is the Focal Length given by f=R/2.
R is the radius of curvature of the spherical mirror
The above formula is valid under all situations for all types of concave and convex and for all object positions.
Linear magnification is defined as the ratio of the image size to the object size;
Magnification= Image size/ Object size.
it can be expressed as the ratio of the distance of the image to the distance v of object u from the mirror. Magnification has no unit.
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Do the sides 7 cm 24 cm and 25cm form a right-angled triangle give reasons?
The sides 7 cm, 24 cm and 25 cm can form a right-angled triangle. The Pythagorean theorem can be used to verify this.
From Pythagorean theorem, it can be said that, the square of hypotenuse side is equal to the sum of other two sides of a right angles triangle.
Let AB, CA and BC be the sides of a right triangle. CA is the hypotenuse side, AB and BC are the base and height sides of the right triangle. Then the equation, can be written as,
CA² = AB² + BC²
Now, let us check this rule for the above given sides of the triangle.
Longest side² = Sum of squares of other two sides
25² = 24² + 7²
625 = 625
Thus, the sides 7 cm, 24 cm and 25 cm can form a right-angled triangle.
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Halima is on her way home in her car. She has driven 9 kilometers so far, which is one-third of the way home. What is the total length of her drive?
Answer:
27
Step-by-step explanation:
If 9 kilometers is 1/3, the total length of her drive would be 9: 1/3=9•3/1=27
Answer:
27
Step-by-step explanation:
if 9 kilometers is 1/3 of her journey then you should take 9 times 3 to find the total distance she needs to travel which is 27 kilometers
What is an example of no solution?
As an example, consider 3x + 5 = 3x - 5. This equation has no solution. There is no value that will ever satisfy this type of equation.
What is infinite solution?
Both sides of an infinite solution are equal. As an illustration, 6x + 2y - 8 = 12x + 4y - 16 Using a formula or method for infinite solutions, you can simplify the equation and make both sides to equal one another, making it an infinite solution. The concept of infinite connotes boundlessness or infinity. Typically, it is denoted by the symbol "".
What is an infinite number?
There are an unlimited number of numbers in a series. a collection of infinitely many natural integers, as an illustration. The initial value 0, and the initial value infinite, are represented by the logarithms and +, respectively.
The original values 0 and infinity are similarly treated when we consider both of the conceivable values and + as a single infinity.
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Use a trigonometric ratio to solve for y. Round to two decimal places as necessary!!
HELP, and can someone explain how to get the answer?
Using Trigonometric Identities, The value of y equals 20.36.
Trigonometric identities are equality conditions in trigonometry that hold for all values of the variables that appear and are defined on both sides of the equivalence. These are identities that, geometrically speaking, involve certain functions of one or more angles. They are not to be confused with triangle identities, which are identities that may involve angles but may also involve side lengths or other lengths of a triangle.
These identities are in use when trigonometric function-based expressions need to be made simpler. The integration of non-trigonometric functions is a crucial application; a typical method is employing the substitution rule with a trigonometric function first, and then simplifying the resulting integral with a trigonometric identity.
Using Trigonometric ratios,
Sin θ = perpendicular / hypotenuse
Sin 69 = 19 / y
0.933 = 19 / y
y = 19 / 0.933
y = 20.36
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Yuri computes the mean and standard deviation for the sample data set 12, 14, 9, and 21. He finds the mean is 14. His steps for finding the standard deviation are below.
The mistake that Yuri has made is that : he divided the equation by n instaed of dividing the equation by n-1
What is the mistake that is made in the solution?While finding the standard deviation of a group of scores, the formula has the denominator as n - 1
where n is the total number of values in the data set.
the data set is 12, 14, 9 and 21. Hence n = 4
N - 1 = 3
Going ahead to work with n = 4 would give a wrong result.
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the correct question is
Yuri computes the mean and standard deviation for the sample data set 12, 14, 9, and 21. he finds the mean is 14. his steps for finding the standard deviation are below. what is the first error he made in computing the standard deviation
The image is attached as well to the question
NEED HELP ASAP!!!!!!!
Select all the ordered pairs that are solutions to 3x - y = 1.
A. (-2,-7)
B. (-1,-4)
C. (0, 1)
D. (3,8)
E. (4,2)
Answer:
A, B, and D
Step-by-step explanation:
Substitute all the coordinates into the equation. (x, y)
3(-2) - (-7) = 1
-6 - (-7) = 1
1 = 1
3(-1) - (-4) =1
-3 - (-4) = 1
1 = 1
3(0) - (1) = 1
0 - (1) = 1
-1 does not equal 1
3(3) - (8) = 1
9 - (8) = 1
1 = 1
Write an equation in slope-intercept form to represent the linear relationship shown in the table.
The equation in y = 2x + 8 for the given coordinates.
What is the slope-intercept form of a line?Finding the equation of a straight line in the coordinate plane is done using the slope-intercept form. A straight-line's equation will be that relationship that:
any place on the line's coordinates must meet.
Any point that is not on the line will not have coordinates that satisfy.
Given coordinates
x -2 -1 0 1
y 4 6 8 10
equation is given by y = mx + c
m is the slope and c is y-intercept
let x₁ = -2, x₂ = -1
y₁ = 4, y₂ = 6
m = (y₂ - y₁)/(x₂ - x₁)
m = (6 - 4)/(-1 - (-2))
m = 2
so y = mx + c
substitute value of m
y = 2x + c
at x = 0 and y = 8
8 = 2(0) + c
c = 8
equation of line y = mx + c
y = 2x + 8
Hence the equation is y = 2x + 8.
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the complete question is in image.
Marge said that she subtracted 20 from both sides of an equation to solve it. Colin thinks that the equation she was solving could have been 6 + t = 20. Does Colin's reasoning make sense? Explain.
Answer:
Colin's reasoning makes sense. If Marge subtracted 20 from both sides of an equation, the equation she was solving could have been 6 + t = 20. On the left side of the equation, 6 + t would be simplified to t. On the right side of the equation, 20 would be subtracted from 20, resulting in a value of 0. So, the equation t = 0 would be the result of Marge's actions.
Answer: Colin's reasoning makes sense. If Marge subtracted 20 from both sides of an equation, the equation she was solving could have been 6 + t = 20. On the left side of the equation, 6 + t would be simplified to t. On the right side of the equation, 20 would be subtracted from 20, resulting in a value of 0. So, the equation t = 0 would be the result of Marge's actions.
Step-by-step explanation:
An item that cost $50.00 is marked 20% off. Sales tax for the item is 8%. What is the final price,including tax
Answer:
$43.20
20% off 50 Is 40 and 8% of 40 is 3.2 so 43.20
4.
What is the solution of the system of equations?
y = –4x + 10
y = –2x – 6
A 10-ft ladder ret againt the ide of a houe. The ditance between the top of the ladder and the ground i 2 ft more than the ditance between the bae of the ladder and the bottom of the houe. Find both ditance
The distance from the base of the ladder to the bottom of the house is 6 feet and the distance between the top of the ladder and the ground is 8 feet.
Length of the ladder = 10 ft
Let the distance between the base of the ladder and the bottom of the house = x
Then the distance between the top of the ladder and the ground = (x+2)
x and x+2 distance are perpendicular to each other and making a right-angle triangle with the ladder of length 10-ft.
By applying pythagoras theorem,
(10)² = (x)² + (x+2)²
100 = x²+x²+4+4x
2x² + 4x - 96=0
x² + 2x - 48 = 0
x² + (8x-6x) - 48=0
x(x+8) - 6(x+8)
(x-6)(x+8) = 0
x = 6, x = -8
Taking the positive value
x= 6 feet, and (x+2) = 8 feet
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