15 POINTS MARKING BRAINLIST PLEASE HELP

The formula and the differences are shown below

The formula to calculate weighted average is:

weighted average = (w1x1 + w2x2 + ... + wnxn) / (w1 + w2 + ... + wn)

Where x1, x2, ..., xn are the values being averaged, and w1, w2, ..., wn are their corresponding weights.

The weighted average gives more importance or weight to certain values than others.

The weights can represent the relative importance, significance, or contribution of each value to the final average.

The main difference between ROR and weighted return is that ROR measures the return of a single investment, while weighted return measures the return of a portfolio or investment that is composed of multiple assets with different weights.

Weighted return takes into account the relative importance of each asset or security in the portfolio, while ROR does not consider the impact of other investments.

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Answer:

To determine if the given equations are symmetric with respect to the origin, we need to check if replacing x with -x and y with -y results in the same equation.

For the equations given:

y=7x-4 is not symmetric with respect to the origin since replacing x with -x and y with -y gives y=-7x+4, which is not the same equation.

y= -x+7 is not symmetric with respect to the origin since replacing x with -x and y with -y gives y=x-7, which is not the same equation.

y = -7x^2 is symmetric with respect to the origin since replacing x with -x and y with -y gives -y = -7(-x)^2, which simplifies to -y = -7x^2. Thus, the equation remains the same.

y = 6x^2 - 9 is not symmetric with respect to the origin since replacing x with -x and y with -y gives -y = 6(-x)^2 - 9, which simplifies to -y = 6x^2 - 9. Thus, the equation is not the same.

x=1/4 y^2 is not symmetric with respect to the origin since replacing x with -x and y with -y gives -x = 1/4 (-y)^2, which simplifies to -x = 1/4 y^2. Thus, the equation is not the same.

x = -y^2 + 9 is symmetric with respect to the origin since replacing x with -x and y with -y gives -x = -(-y)^2 + 9, which simplifies to -x = -y^2 + 9. Thus, the equation remains the same.

y=-1/6 x^3 is symmetric with respect to the origin since replacing x with -x and y with -y gives -y=-1/6(-x)^3, which simplifies to -y=-1/6 x^3. Thus, the equation remains the same.

y=x^3-1 is not symmetric with respect to the origin since replacing x with -x and y with -y gives -y=(-x)^3-1, which simplifies to -y=-x^3-1. Thus, the equation is not the same.

y=sqrt(x) is not symmetric with respect to the origin since replacing x with -x and y with -y gives -y=sqrt(-x), which is not the same equation.

y=sqrt(x)-6 is not symmetric with respect to the origin since replacing x with -x and y with -y gives -y=sqrt(-x)-6, which is not the same equation.

Therefore, the only equation that is symmetric with respect to the origin is y = -7x^2.

Answer:

i can only see b not c

Step-by-step explanation:

Answer:

s^2+2s-8

Step-by-step explanation:

(s-2)(s+4)

=s^2+4s-2s-8

simplified= s^2+2s-8

Answer:

s^2+2s-8

Step-by-step explanation:

(s-2)(s+4)

=s^2+4s-2s-8

simplified= s^2+2s-8

Answer:

As the number of sides of the bases of a prism increases, the shape of the prism becomes more complex and closer in form to a cylinder. For example, a prism with two identical polygonal bases, such as a rectangular prism or a triangular prism, will have a more blocky or pyramidal shape. However, as the number of sides of the base increases, the shape of the prism becomes more cylindrical and less pyramidal in appearance. This is because the more sides a polygon has, the more closely it approximates a circle, and the cross-section of the prism becomes more circular in shape.

When the number of sides of the base of a prism increases, the prism becomes more like a cylinder.

Answer:

(a) The total ratio is 1 + 3 = 4, so Jill's share is (3/4) of £60:

Jill's share = (3/4) × £60 = £45.

(b) The ratio of their ages remains the same, so if Jack is one year older, Jill is also one year older. Therefore, Jill's age is 4 and Jack's age is 2, and Jack's share is (2/4) of £60:

Jack's share = (1/2) × £60 = £30.

(c) Let x be the age of Jack when he receives £25 from Uncle Fred. According to the problem, Jill is always two years older than Jack. Therefore, when Jack is x years old, Jill is x + 2 years old. The ratio of their ages is x : (x + 2), and this ratio is equal to 5/7 (25 pounds is 5/7 of 35 pounds, which is the total amount that they will receive). We can write an equation to solve for x:

x/(x+2) = 5/7

7x = 5(x + 2)

7x = 5x + 10

2x = 10

x = 5

Therefore, Jack will be 5 years old when he receives £25 from Uncle Fred at Christmas.

A) £45 because Jill will get 3/4 and Jack will get 1/4. To check our work, 60 divided by 4 is 15. 15 times 3 is 45 and 15 times one is 15.

B) £30 because it is a new year, both nephews will increase by one year. Now Jill is 4 and Jack is 2. So each kid will get half the share. 2 divided by 4 is 0.5 which is half of one. Half of 60 is 30.

C) 5 years Jill will always be 2 years older than Jack; this shows us that if some more years pass, Jill will be 7 and Jack will be 5 —> 1/4 x £60 = £25 Multiplying both sides by 4/60, we get:x = 5/4. This means Jack will be 5.

—————

Please remember to revise this and make it in your own words if you want! I am unsure about question C so comment!! I hope this helps you. -Doodle

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Using the magnitude formula we know the amount of energy released by an earthquake with a magnitude of 5.5 is 4.5 * 10¹².

The magnitude or size of a mathematical item defines whether it is larger or smaller than other objects of the same kind in mathematics.

Formally speaking, the size of an object is the visible outcome of an ordering—of the class of objects to which it belongs.

The most frequent way to gauge an earthquake's size is through its magnitude.

It is a gauge for the magnitude of an earthquake's sole source.

As a result, it is the same regardless of how or where you view it, and the following computation can be made:

So, in the given situation we will be using the formula:

M = 2/3 log E/E₀

Where E is the power released in Joules and x, the minimal measure released by such an earthquake shall be allotted to.

Assuming 5.5, the same magnitude is given when the above equation is used:

M = 2/3 log E/E₀

5.5 = 2/3 log (E/10⁴°⁴)

8.5 = log (E/10⁴°⁴)

10⁸°⁵ = E/10⁴°⁴

E = 10⁴°⁴ * 10⁸°⁵

E = 4.5 * 10¹²

Therefore, using the magnitude formula we know the amount of energy released by an earthquake with a magnitude of 5.5 is 4.5 * 10¹².

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Correct question:

The magnitude, M, of an earthquake, is represented by the equation M=23logEE0 where E is the amount of energy released by the earthquake in joules and E0=104.4 is the assigned minimal measure released by an earthquake. In scientific notation rounded to the nearest tenth, what is the amount of energy released by an earthquake with a magnitude of 5.5?

Answer: cos∅= [tex]\frac{\sqrt{7} }{4}[/tex]

Step-by-step explanation:

All numbers are positive because it is first quadrant.  Draw a line out.

sin = opp/hypotenuse.  the opposite line of the angle (y) =3

and hypotenuse=4

use pythagorean theorem to find x

4²=3²+x²

[tex]x=\sqrt{7}[/tex]

now use cos=adjacent/hypotenuse

cos∅= [tex]\frac{\sqrt{7} }{4}[/tex]

The mean low temperature in Ketchikan from Monday to Friday is given as follows:

b. -5.4 ºF.

The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations, which is also called the cardinality of the data-set.

The five observations in the data-set are given as follows:

-10, -20, 5, 3 and -5.

Hence the mean of the data-set is given as follows:

(-10 - 20 + 5 + 3 - 5)/5 = -5.4 ºF.

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Approximately 1.18 hours the concentration is highest.

The given function is c(t)=100t/t² +85.

When the concentration is highest, the function becomes

100t/t² +85 =0

100/t +85=0

100+85t=0

85t=100

t=100/85

t=1.18 hours

Therefore, approximately 1.18 hours the concentration is highest.

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Where the conditions above are given with regard to the above triangle, the ratio AD:DB is 1:1.

Since D is the midpoint of AB, we have:

AD = DB

Let M and N be the midpoints of OA and OB, respectively. Then we have:

AM = MO = x/2

BN = NO = y/2

Also, from the given information, we have:

OD = 3/7x + 4/7y

Since D is the midpoint of AB, we have:

AD + DB = AB

Substituting AD = DB, we get:

2AD = AB

Therefore:

AD = AB/2

We can express AB in terms of x and y using the law of cosines:

AB^2 = OA^2 + OB^2 - 2(OA)(OB)cos(BOA)

Since M and N are midpoints, we have:

OM = OA/2 and ON = OB/2

Therefore, using the law of cosines, we have:

MN^2 = OM^2 + ON^2 - 2(OM)(ON)cos(MON)

Substituting OM = OA/2 and ON = OB/2, we get:

MN^2 = OA^2/4 + OB^2/4 - (OA)(OB)/2 cos(BOA)

But MN = OD, so we can also express this as:

OD^2 = (3/7x + 4/7y)^2 = OA^2/4 + OB^2/4 - (OA)(OB)/2 cos(BOA)

Substituting OD^2 = (3/7x + 4/7y)^2 and simplifying, we get:

9x^2 + 16y^2 = 49(OA^2 + OB^2) - 42(OA)(OB) cos(BOA)

Substituting AB^2 = OA^2 + OB^2 - 2(OA)(OB) cos(BOA) and simplifying, we get:

9x^2 + 16y^2 = 49AB^2

Substituting AD = AB/2, we get:

9x^2 + 16y^2 = 49(2AD)^2

Simplifying, we get:

x^2 + 4y^2 = 28AD^2

We want to find the ratio AD:DB, which is the same as the ratio AD:(AB - AD). Substituting AB = 2AD, we get:

AD:(AB - AD) = AD:AD = 1:1

Therefore, the ratio AD:DB is 1:1.

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1) The length of the segments BC =√53   FG =√53  JK =√53

2) The statements that are true are;

BC ≅ FG

BC ≅ JK

FG ≅ JK

To find the lengths of the segments, we use the formula d = √((x2 - x1)² + (y2 - y1)²)

For BC, it would be √((1 - (-6))² + (2 - 4)²) = √53.

It would ordinarily be 7.3. However, since approximations are not needed, it has been left in the form of squareroot

For  FG: √((-5 - (-7))² + (-1 - 6)²) = √53.

The answers provided are based on the questions seen in the image

Here are the endpoints of the segment BC, FG and JK.

B (-6, 4)  C (1, 2)        F (-7, 6),  G (-5, -1)        J (1, -8), K (3, -1)

Find the length of each segment. give an exact answer (not a decimal approximate)

BC =     FG =      JK =

Check all the statement that are true below;

BC ≅ FG

BC ≅ JK

FG ≅ JK

None of these are true.

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Answer:3-7=5

Step-by-step explanation: 3-7=5

Answer:

24.6 degrees.

Step-by-step explanation:

To find the degree measure of the radians in a right triangle with hypotenuse = 7 and opposite = 3, we need to use trigonometric ratios. Since the opposite and hypotenuse are given, we can use the sine ratio.

sin(θ) = opposite/hypotenuse

sin(θ) = 3/7

Now we need to find the angle measure θ. We need to use the inverse sine or arcsine function to do this.

θ = sin^-1(3/7)

θ ≈ 0.429 radians

To find the degree measure, we must convert radians to degrees by multiplying by 180/π.

θ ≈ 0.429 x 180/π

θ ≈ 24.6 degrees

Therefore, the degree measure of the radians in the given triangle is approximately 24.6 degrees.

The line plot representing the values on the number line can be presented as follows;

[tex]{}[/tex]         ×

[tex]{}[/tex]         ×                             ×

[tex]{}[/tex]         ×      ×                     ×      ×

<-|------|------|------|------|------|------|------|------|->

 [tex]{}[/tex]0     1/8    1/4          1/2   5/8  3/4           1

A line plot is a graph displaying data as points above a number, which indicates the frequency of the data.

The values in the fraction can be expressed as follows;

5/8, 5/8, 1/4, 1/8, 1/8, 3/4, 1/8

The values that are repeated can be excluded to get;

Values to be represented are; 5/8, 1/4, 1/8, 3/4

The above fractions can be expressed as fractions with a denominator of 8 as follows;

5/8, 1/4, 1/8, 3/4 = 5/8, 2/8, 1/8, 6/8

The fractions can be arranged in increasing order as follows;

5/8, 2/8, 1/8, 6/8; 1/8, 2/8, 5/8, 6/8

The fractions 1/8, 2/8, 5/8, 6/8, can therefore, be entered into the number line as follows;

<-|------|------|------|------|------|------|------|------|->

 0[tex]{}[/tex]    1/8   2/8          1/2    5/8  6/8           1

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Answer:

Step-by-step explanation:

b

Answer:

47 + 9f [tex]\leq[/tex] 120

Step-by-step explanation:

B is the correct answer.

Answer:

[tex]4k < -\frac{3}{2}[/tex]

Step-by-step explanation:

"A number k multiplied by 4 is less than -3/2"

First, let's look at the first part:

"A number k..."
We know the number we are operating is called k.

Let's look at the second part.

"...multiplied by 4..."

Now, we are multiply k by 4. After doing so, we get:

[tex]4k[/tex]

Finally, let's look at the last part.

"...is less than -3/2"

The quantity "a number k multiplied by 4" (or 4k) is less than -3/2.

We can rewrite this as:

[tex]4k < -\frac{3}{2}[/tex]

Answer:

If (x-1) is a factor of the polynomial f(x) = 4x² - 4x² - x - K, then we know that (x-1) divides evenly into the polynomial, which means that the polynomial can be written as:

f(x) = (x-1)(ax + b)

where a and b are constants that we need to determine. We can use the distributive property to expand this expression and equate it with the original polynomial:

f(x) = (x-1)(ax + b) = 4x² - 4x - K

Expanding the left side of the equation, we get:

ax² + bx - ax - b = ax² - (a-b)x - b = 4x² - 4x - K

Now we can equate the coefficients of the like terms on both sides of the equation.

The coefficient of x^2 on the left side is a, and on the right side it is 4. Therefore, we have:

a = 4

The coefficient of x on the left side is b - a, and on the right side it is -4. Therefore, we have:

b - a = -4

Substituting a=4, we get:

b - 4 = -4

Solving for b, we get:

b = 0

So the polynomial can be written as:

f(x) = (x-1)(4x + 0) = 4x² - 4x

Therefore, K = 0.

To find the roots of the equation, we need to set f(x) = 0 and solve for x:

4x² - 4x = 0

Factor out 4x:

4x(x - 1) = 0

So the roots of the equation are x = 0 and x = 1.

Therefore, you are three times more likely to be on time than be late if you take Route C to school.

Relative frequency is a statistical term that refers to the proportion or percentage of times an event or a particular value occurs within a larger set of data. It is calculated by dividing the number of times the event or value occurs by the total number of observations in the data set.

Here,

To determine how many times more likely you are to be on time than late if you take Route C, we need to compare the heights of the green and red bars for Route C. From the graph, we can see that the green bar (representing on-time arrivals) is approximately three times taller than the red bar (representing late arrivals) for Route C.

To calculate how many times more likely you are to be on time than late if you take Route C, we need to find the ratio of the heights of the green and red bars:

Ratio = height of green bar / height of red bar

Looking at the segmented bar graph, we can see that the height of the green bar for Route C is approximately 0.45, and the height of the red bar is approximately 0.15.

Ratio = 0.45 / 0.15

= 3

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Answer:

B

Step-by-step explanation:

All of the lines of best fit are close to the points in the scatter plot except B.

The line of best fit in B does not even touch any of the points in the scatter plot, so it is not a good example of a line of best fit.

The value of (a) in given triangle is approximately 7.44 cm.

A triangle is a three-sided polygon consisting of three sides and three vertices. The most important property of a triangle is that the sum of its interior angles  is  180 degrees.

Let ΔABC is a triangle

Given ∠ B = 75°

∠ C = 31.8°

AB = 12cm

AC = 22cm

find BC = ?

We can use the law of cosines to solve for BC:

BC² = AB² + AC² – 2(AB)(AC)cos(B)

We know that angle B = 75 degrees, so we can substitute:

BC² = 12² + 22² - 2(12)(22)cos(75)

Evaluating cos(75) with a calculator, we get:

BC² ≈ 144 + 484 - 572.59

BC² ≈ 55.41

Taking the square root of both sides gives us:

BC ≈ 7.44

Therefore, BC is approximately 7.44 cm.

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The correct answer is not listed among the options. The correct answer is E. 1/x.

What is function?

In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.

To find f'(x), we need to differentiate the function f(x) with respect to x. Since we are given k(x) = 3x, we can use the chain rule to differentiate f(x) = ln(k(x)) = ln(3x) as follows:

f'(x) = d/dx [ln(3x)]

= 1/(3x) * d/dx [3x] (applying the chain rule)

= 1/(3x) * 3

= 1/x

Therefore, the correct answer is not listed among the options. The correct answer is E. 1/x.

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Every six months, you will receive $21.50 back from your bond.

The 4.3% coupon is the annual interest rate, which is paid semi-annually (twice a year).

To find the amount earned every 6 months, we need to divide the annual interest rate by 2:

(4.3% / 2) = 2.15%

Next, we need to calculate the dollar amount earned every 6 months. To do this, we need to find 2.15% of the bond's face value:

2.15% of $1000 = $21.50

Therefore, you will earn $21.50 off your bond every 6 months.

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The volume of the cone is 288π m³. Hence, the answer is option C, 288π m³.

A cone is a shape created by connecting all the points of a circular base (which does not contain the apex) to a common point known as the apex or vertex using a series of line segments or lines. The height of the cone is determined by measuring the distance between its vertex and base.

The formula for the volume of a cone is given by V = (1/3)πr²h, where r is the radius and h is the height.

Substituting the given values, we get:

V = (1/3)π(6²)(24)

V = (1/3)π(36)(24)

V = (1/3)(864π)

V = 288π

Therefore, the volume of the cone is 288π m³.

Hence, the answer is option C, 288π m³.

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Answer:

g to the power of 2

Step-by-step explanation:

Me=smart

The volume of the complete prism is  1625 cubic in

The volume of the figure is solved by dividing the figure into two sections and solving for each volume then adding the individual volume together.

The divisions are section 1 and section 2

section 1 has dimensions: 20 x 15 x 5

volume = 20 x 15 x 5 = 1500 cubic in

section 2 has dimensions: 5 x 5 x 5

volume = 5 x 5 x 5 = 125 cubic in

Volume of the complete figure

section 1  + section 2

= 1500 cubic in + 125 cubic in

= 1625 cubic in

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The area of the rectangular picture frame with twenty inches in length, and a width of fifteen inches is 180inches.

Given length of the rectangular picture frame = 20inches

Given width of the rectangular picture frame = 15inches

The formula for finding the area of a rectangular frame is the multiplication of both length and width = Length x Width

So, the area of the given rectangular picture frame = 20 x 15 = 180 inches

From the above explanation, we can conclude that the area of the given rectangular frame with length of 20 inches and the width of 15 inches is 180 inches.

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Answer:

it would be 3 or 2

Step-by-step explanation:

Answer:

C. y = 3/2x + 4

Step-by-step explanation:

C. y = 3/2x + 4