Ratios and Proportions (please help on all questions)

The number of particles in 9.89 moles of carbon is solved to be

To determine the number of particles in 9.89 moles of carbon, we can use Avogadro's constant, which is defined as the number of particles (atoms or molecules) in one mole of a substance.

Avogadro's constant is approximately 6.02 x 10^23 particles per mole.

So, the number of particles in 9.89 moles of carbon is:

= 9.89 moles x (6.02 x 10^23 particles/mole)

= 5.95 x 10^24 particles

Therefore, there are approximately 5.95 x 10^24 particles in 9.89 moles of carbon.

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The solution to the trigonometric expression is given as follows:

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)) = csc(x) + sec(x).

The trigonometric expression for this problem is defined as follows:

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)).

The tangent and the cotangent are represented as follows:

Hence:

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)) = sin(x)[1 + sin(x)/cos(x)] + cos(x)[1 + cos(x)cot(x)]

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)) = sin(x)+sin²(x)/cos(x) + cos(x) + cos²(x)/sin(x)

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)) = [sin²(x)cos(x) + sin³(x) + sin(x)cos²(x) + cos³(x)]/(sin(x)cos(x))

sin(x)(1 + tan(x)) + cos(x)(1 + cot(x)) = csc(x) + sec(x).

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If Jayla makes her goal 80% of the time, we can say that she has a probability of 0.8 of achieving her goal on any given day.

The probability of Jayla making her goal every day for the next 10 days can be calculated by multiplying the probability of her achieving her goal on each day.

Assuming each day's result is independent of the previous day, the probability of Jayla making her goal every day for the next 10 days is:

0.8 x 0.8 x 0.8 x 0.8 x 0.8 x 0.8 x 0.8 x 0.8 x 0.8 x 0.8 = 0.1073741824

So, there is approximately a 10.7% chance that Jayla will make her goal every day for the next 10 days.

Answer:

Step-by-step explanation:

1,500 times 0.06 = 90

90 divided by 2 = 45

Answer: The interest rate per quarter is 5%/4 = 1.25%.

At the end of the first quarter, the balance is:

$1000 + $1000(1.25%) = $1000 + $12.50 = $1012.50

At the end of the second quarter, the balance is:

$1012.50 + $1012.50(1.25%) = $1012.50 + $12.66 = $1025.16

At the end of the third quarter, the balance is:

$1025.16 + $1025.16(1.25%) = $1025.16 + $12.82 = $1037.98

At the end of the fourth quarter, the balance is:

$1037.98 + $1037.98(1.25%) = $1037.98 + $13.00 = $1050.98

Therefore, the year-end balance is $1050.98 (rounded to the nearest penny).

Step-by-step explanation:

According to the given problem, the linear regression line for the given data is y = -0.65 + 0.26x

What is linear regression?

Linear regression is a statistical method used to find the relationship between a dependent variable (y) and one or more independent variables (x). It assumes that there is a linear relationship between the variables, meaning that changes in the independent variable(s) are associated with proportional changes in the dependent variable.

The linear regression model can be represented as a straight-line equation:

y = b0 + b1*x + e

The equation of a linear regression line can be written as:

y = b0 + b1*x

where y is the dependent variable (car sales in this case), x is the independent variable (number of TV commercials), b0 is the intercept, and b1 is the slope of the line.

To find the values of b0 and b1, we need to calculate the following:

n = number of data points = 4

Σx = sum of x values = 54

Σy = sum of y values = 28

Σxy = sum of (x*y) values = 164

Σx^2 = sum of (x^2) values = 689

Using these values, we can calculate b1:

b1 = (nΣxy - ΣxΣy) / (n*Σx^2 - Σx^2)

b1 = (4164 - 5428) / (4*689 - 54^2)

b1 = 0.26 (rounded to two decimal places)

Next, we can use b1 to calculate b0:

b0 = (Σy - b1*Σx) / n

b0 = (28 - 0.26*54) / 4

b0 = -0.65 (rounded to two decimal places)

Therefore, the linear regression line for the given data is:

y = -0.65 + 0.26x

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Answer:

see explanation

Step-by-step explanation:

Part A is correct

Part B

student A solved the system correctly

Part C

student B  made the error from step 3 to step 4 , that is

step 3 : 3x - 5x + 150 = 114

step 4 : - 2x + 150 = 114 ( should be - 2x not 2x was the error made )

step 5 : - 2x = 114 - 150 = - 36

step 6 : - 2x = - 36 ( divide both sides by - 2 )

                x = 18

substitute x = 18 into y = - x + 30 ( from step 1 )

y = - 18 + 30 = 12

Answer : (18, 12 ) which is the answer student A obtained correctly

Answer:

The true statement about the circumference of a circle is: circumference is found by multiplying Pi by the diameter

Step-by-step explanation:

Answer:

3(5x+7)-6 (4-2x)

15x+21-24+12x = 27x-3

or

15x+21-6+4-2x = 13x+19

Answer:

give full question please its not full

Answer:

Let's begin by finding the total work required to complete the manuscript of the book:

Total work = (Number of typists) x (Number of hours per day) x (Number of days) = 6 x 5 x 16 = 480

Now let's find the work done by 4 typists working 6 hours per day:

Work done by 4 typists = (Number of typists) x (Number of hours per day) x (Number of days) = 4 x 6 x d

where d is the number of days required to complete the manuscript.

Since the amount of work done is the same in both cases, we can set the two equations equal to each other and solve for d:

6 x 5 x 16 = 4 x 6 x d

Simplifying this equation, we get:

480 = 24d

Dividing both sides by 24, we get:

d = 20

Therefore, it will take 4 typists working 6 hours per day a total of 20 days to complete the manuscript of the book.

Step-by-step explanation:

Answer:

To find the lowest form of 28 upon 36, we need to simplify or reduce the fraction to its lowest terms. This can be done by finding the greatest common factor (GCF) of the numerator (28) and the denominator (36) and dividing both by it.

First, we can find the prime factors of 28 and 36:

28 = 2 × 2 × 7

36 = 2 × 2 × 3 × 3

Next, we can identify the common factors, which are 2 and 2.

To find the greatest common factor, we need to multiply the common factors together. In this case, 2 × 2 = 4, so the greatest common factor is 4.

Now we can divide both the numerator and the denominator by the GCF:

28 ÷ 4 = 7

36 ÷ 4 = 9

Therefore, the lowest form of 28 upon 36 is 7/9.

Step-by-step explanation:

Answer:
The area is given by the expreesion:

A  = 5f + 10

Step-by-step explanation:

Notice the height of the shaded area is 5. But the base is the difference between f+9 and 7
So the length of the shaded area will be f+9-7=f+2

then the area of a rectangle is given by A=height*length
This is
A = 5 (f+2) = 5f+10

Question: Write an expression for the area shaded section of this rectangle. Expand your brackets


The area of shaded section is 5f+10

To calculate the area of ​​the rectangle, it is known that just multiply the measurement of the height by the length.

So, to calculate the value of the area of ​​this rectangle considering that the shaded area is part of it, we would do [tex]\sf f+9\times5[/tex].

The area of ​​the shaded section will be given by the difference between the area of ​​the shaded area and the unshaded area.

That is, [tex]\sf(f+9-7)\times5[/tex]

[tex]\begin{array}{l}\sf(f+9-7)\times5\\\sf(f+2)\times5\\\sf 5f+2\times5\\\therefore \bf 5f+10\end{array}[/tex]

5f+10 is the shaded section area expression

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The next three terms of the sequence 240,-120,60 are -30, 15 and -7.5

240, -120, 60

From observation, the second term is found by halving the first term and multiplying by negative

The third is found by halving the second term and multiplying by negative.

The fourth term = negative third term divided by half

= -(60/2)

= -30

The fifth term = negative fourth term divided by half

= -(-30/2)

= 15

The sixth term = negative fifth term divided by half

= -(15/2)

= -7.5

Hence, the next terms of 240, -120, 60 are -30, 15 and -7.5

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The sequence generated by the formula f(n) = (4n - 7) starting with n = 1 is: -3, 1, 5, 9, 13

A function is typically denoted by a symbol, such as "f(x)", where "x" is the input value and "f(x)" is the output value. The input value is sometimes referred to as the "argument" of the function.

The formula f(n) = (4n - 7) generates a sequence of numbers when we plug in different values of "n". To generate the terms f(1), f(2), f(3), f(4), f(5) we need to substitute each value of n into the formula and evaluate the expression.

Starting with n = 1, we can generate the terms as follows:

f(1) = (4 × 1 - 7) = -3

f(2) = (4 × 2 - 7) = 1

f(3) = (4 × 3 - 7) = 5

f(4) = (4 × 4 - 7) = 9

f(5) = (4 × 5 - 7) = 13

So the sequence generated by the formula f(n) = (4n - 7) starting with n = 1 is: -3, 1, 5, 9, 13

Each term in the sequence is found by plugging in a different value of "n" into the formula f(n) = (4n - 7). The first term, f(1), is found by plugging in n = 1, the second term, f(2), is found by plugging in n = 2, and so on.

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Fοr the fifth mοnth, priοr balance is $4469.69, interest οn priοr balance is $77.78, mοnthly payment is $175, and ending balance is $4389.72.

Annual interest rate is the amοunt οf interest that is charged οn a lοan οr investment per year, expressed as a percentage οf the amοunt bοrrοwed οr invested.

Tο cοmplete the table, we can use the fοllοwing steps:

Fοr the first mοnth:

Priοr balance: $4900

Interest οn priοr balance: 1.75% οf $4900 = $85.75 (rοunded tο the nearest cent)

Mοnthly payment: $175

Ending balance: $4900 + $85.75 - $175 = $4710.75 (rοunded tο the nearest cent)

Fοr the secοnd mοnth:

Priοr balance: $4710.75

Interest οn priοr balance: 1.75% οf $4710.75 = $82.46 (rοunded tο the nearest cent)

Mοnthly payment: $175

Ending balance: $4710.75 + $82.46 - $175 = $4628.21 (rοunded tο the nearest cent)

Repeat the same prοcess fοr the next three mοnths:

Fοr the third mοnth, priοr balance is $4628.21, interest οn priοr balance is $80.89, mοnthly payment is $175, and ending balance is $4549.10.

Fοr the fοurth mοnth, priοr balance is $4549.10, interest οn priοr balance is $79.34, mοnthly payment is $175, and ending balance is $4469.69.

Fοr the fifth mοnth, priοr balance is $4469.69, interest οn priοr balance is $77.78, mοnthly payment is $175, and ending balance is $4389.72.

Mοnth    Priοr Balance      Interest              Mοnthly           Ending

                                              οn                  Payment          Balance

                                       Priοr Balance    

1                   $4900           $85.75                 $175          $4710.75

2                  $4710.75        $82.46                 $175          $4628.21

3                   $4628.21       $80.89                $175         $4549.10

4                  $4549.10        $79.34                 $175         $4469.69

5                  $4469.69       $77.78                 $175          $4389.72

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The probability that they do not like cats given that person does not like dogs: 13/51.

Total people : 324.

People like dogs D: 120

Probability P(D) = 120/324

Probability Not like dogs P(D') = 1 - 120/324 = 204/324

People like cats C: 150

Probability P(C) = 150/324

Probability who don't like digs but like cats:

P(C ∩ D') = 52/ 324

Probability that they do not like cats given that person does not like dogs:

P(C'/D') = 1  -  P(C ∩ D')/P(D')

P(C'/D') = 1 - (52/324) /(204/324)

P(C'/D') = 1 - 52/204

P(C'/D') = 152/204 = 13/51

Thus, the probability that they do not like cats given that person does not like dogs: 13/51.

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Answer:

50¢/cookie, $1.00/lemonade

Step-by-step explanation:

Let l = cost of one lemonade

c = cost of one cookie

We have:

5l + 2c = 1.50 -------> 10l + 4c = 3.00

2l + 5c = 2.70 -------> 10l + 25c = 13.50

-----------------------

21c = 10.50

c = .50

5l + 2(.50) = 1.50

5l + 1.00 = 1.50

5l = 5, so l = 1.00

Each cookie costs 50¢, and each lemonade costs $1.00.

Answer:

Step-by-step explanation:

Find the area of the outer trapezoid and then subtract the area of the inner trapezoid.

[tex]A=\frac{1}{2} (a+b)h[/tex]

[tex]A_o=\frac{1}{2} (6+2)6=24[/tex]

[tex]A_i=\frac{1}{2} (4+2)3=9[/tex]

Total area = 24 - 9 =15 square units

The required point's coordinates are (0,3).

A mathematical statement known as an equation consists of two algebraic expressions separated by equal signs (=) on either side.

It demonstrates the equality of the relationship between the printed statements on the left and right.

Left side equals right side in all formulas.

To find the values of unknowable variables, which stand in for unknowable quantities, you can solve equations.

A statement is not an equation if it lacks the equals sign. When two expressions have the same value, a mathematical statement known as an equation will include the symbol "equal to" between them.

Hence, The required point's coordinates are (0,3).

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Regan invested the money for 8 years at simple interest to earn $2000.

Simple interest is calculated on the loan amount or principle amount, whereas compound interest is calculated using both the principal amount and the interest that has accrued over the course of a prior period or particular time. Simple interest is based on the principal amount, which is the main distinction between it and compound interest. Contrarily, compound interest is calculated using the principle sum and interest that has been compounded over the course of a period.

The simple interest is given as:

SI = Prt

where I is the interest earned.

P is the principal, = 500.

is the interest rate = 5% = 0.05.

t is the time (in years).

Substituting the values:

2000 = 500 * 0.05 * t

t = 8 years

Hence, Regan invested the money for 8 years at simple interest to earn $2000.

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Option B. g(x)=(x-2)²is the equation of blue graph.

A graph is a visual representation or diagram that displays facts or values in an organized manner in mathematics.

The red graph is represented by the function:

f(x)=x²

Also, we need the formula for the blue graph.

We can see that the blue graph is just the red graph with the horizontal axis moved 2 units to the right.

An example of a horizontal transition is:

f(x-h) where h is the quantity we shift (to the right).

h = 2 since we moved two units to the right.

Our new role will thus be:

g(x)=f(x-2)=(x-2)²

Therefore:

g(x)=(x-2)²

Our response is B.

Notes:

A denotes a downward vertical movement of two units.

C (assuming it is x²) denotes a two-unit vertical displacement upward.

And D (if you let h = -2, then f(x - (-2)) = f(x + 2) = (x + 2)²) is a horizontal shift of two units to the left.

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the complete question is:

The graphs below have the same shape. What is the equation of the blue

graph?

f(x) = x2

g(x) = ?

9(x) =

O A. g(x) = x² - 2

B. g(x) = (x - 2)2

c. g(x) = x + 2

D. Q(x) = (x + 2)2

Image is attached below;

We can plot (0, 4) and (1, -28) points on a coordinate plane and draw a straight line passing through both points to graph the function.

What is a coordinate plane?

A coordinate plane, also known as a Cartesian plane, is a two-dimensional plane that is used to plot points and graph mathematical equations. It consists of two perpendicular number lines called the x-axis and the y-axis. The x-axis is the horizontal line, with positive values to the right of the origin (0) and negative values to the left of the origin. The y-axis is the vertical line, with positive values above the origin and negative values below the origin. The x-coordinate gives the horizontal position of the point, and the y-coordinate gives the vertical position of the point. By plotting points on a coordinate plane, we can graph lines, curves, and other mathematical functions. It is a fundamental tool in mathematics, science, and engineering for visualizing and analyzing relationships between variables.

To find two points on the line of the function r(x) = 4 - 32x, we can simply choose any two values of x and find the corresponding values of r(x).

For example, when x = 0:

r(0) = 4 - 32(0) = 4

So one point on the line is (0, 4).

When x = 1:

r(1) = 4 - 32(1) = -28

So another point on the line is (1, -28).

Therefore, we have two points on the line: (0, 4) and (1, -28).

We can plot these points on a coordinate plane and draw a straight line passing through both points to graph the function.

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We can write the number in scientific nοtatiοn as: $1.5489*107 = 1.5489 * 10 pοwer 7$ This is the standard nοtatiοn fοr the given number.

Algebraic expressiοn can be defined as cοmbinatiοn οf variables and cοnstants.

In scientific nοtatiοn, a number is expressed as the prοduct οf a decimal number between 1 and 10 (called the cοefficient) and a pοwer οf 10 (called the expοnent). The expοnent indicates hοw many places the decimal pοint needs tο be mοved tο οbtain the οriginal number.

In the given number, $1.5489*107$, the cοefficient is 1.5489, and the expοnent is 7, which means the decimal pοint needs tο be mοved 7 places tο the right tο οbtain the οriginal number.

Therefοre , we can write the number in scientific nοtatiοn as: $1.5489*107 = 1.5489 * 10 pοwer 7$ This is the standard nοtatiοn fοr the given number.

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By answering the given question, we may state that We can apply the formula if we know the radius: C = 2πr where the radius r is.

In geometry, a circle's diameter is any straight line segment whose endpoint is on the circle and which passes through its centre. Another name for it is the circle's longest chord. The diameter of a sphere can be defined using either idea. The diameter is the length of the line perpendicular to the two points at either end of the circle. If you think of length as the distance between two points, then diameter is length. The diameter of a circle is the separation between its two farthest points.

We must know the base's diameter or radius in order to calculate the circumference of the tin.

If we know the diameter, we can apply the following formula to determine the circle's circumference:

C = πd

where d is the diameter and C is the circumference.

We can apply the formula if we know the radius:

C = 2πr

where the radius r is.

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Answer:

To find the cost of supplying bins to 10%, 50%, and 85% of the cost to supply 10%, we can use proportional reasoning.

Let X be the cost to supply 10%. Then:

The cost to supply 50% is 5 times the cost to supply 10%, so it is 5X.

The cost to supply 85% is 8.5 times the cost to supply 10%, so it is 8.5X.

The cost to supply 10% is X.

To find the cost of supplying bins to 10%, 50%, and 85% of the cost to supply 10%, we can substitute X = $1 and multiply by the appropriate percentages:

The cost to supply bins to 10% of the cost to supply 10% is 0.1 * X = 0.1 * $1 = $0.10.

The cost to supply bins to 50% of the cost to supply 10% is 0.5 * X = 0.5 * $1 = $0.50.

The cost to supply bins to 85% of the cost to supply 10% is 0.85 * X = 0.85 * $1 = $0.85.

Therefore, the costs of supplying bins to 10%, 50%, and 85% of the cost to supply 10% are $0.10, $0.50, and $0.85, respectively.

Answer:

Let the cost to supply 10% of the bins be X dollars.

To find the cost of supplying bins to 50% of the cost to supply 10%, we can set up the following proportion:

10% of the cost = X dollars

50% of the cost = Y dollars

We know that the two costs are proportional, so we can set up the following equation:

10% / 50% = X / Y

Simplifying this equation, we get:

0.1 / 0.5 = X / Y

0.2 = X / Y

Multiplying both sides by Y, we get:

Y * 0.2 = X

Y = X / 0.2

Y = 5X

Therefore, the cost of supplying bins to 50% of the cost to supply 10% is 5 times the cost of supplying bins to 10%.

Substituting X = C/10 (where C is the cost to supply 10% of the bins), we get:

Y = 5X = 5(C/10) = C/2

So the cost of supplying bins to 50% of the cost to supply 10% is C/2 dollars.

To find the cost of supplying bins to 85% of the cost to supply 10%, we can set up a similar proportion:

10% of the cost = X dollars

85% of the cost = Z dollars

We know that the two costs are proportional, so we can set up the following equation:

10% / 85% = X / Z

Simplifying this equation, we get:

0.1 / 0.85 = X / Z

0.1176 = X / Z

Multiplying both sides by Z, we get:

Z * 0.1176 = X

Z = X / 0.1176

Z = 8.5X

Therefore, the cost of supplying bins to 85% of the cost to supply 10% is 8.5 times the cost of supplying bins to 10%.

Substituting X = C/10 (where C is the cost to supply 10% of the bins), we get:

Z = 8.5X = 8.5(C/10) = 0.85C

So the cost of supplying bins to 85% of the cost to supply 10% is 85% of the cost to supply 10%, or 0.85C dollars.

Therefore, the costs of supplying bins to 10%, 50%, and 85% of the cost to supply 10% are:

- 10% of the cost: X dollars = C/10 dollars

- 50% of the cost: Y dollars = C/2 dollars

- 85% of the cost: Z dollars = 0.85C dollars

Answer:

95% of that number is 361

Step-by-step explanation:

Let's start by finding the actual value of the number.

If 80% of a number is 304, we can set up the equation:

0.8x = 304

To solve for x, we can divide both sides by 0.8:

x = 380

So the number is 380.

Now we can use the second piece of information to find 15% of the number:

0.15(380) = 57

This confirms that our value for x is correct.

Finally, we can use this information to find 95% of the number:

0.95(380) = 361

Therefore, 95% of the number is 361.

Answer: The circumference would be 62.83

Step-by-step explanation:

C=2πr=2·π·10≈62.83185

Answer: I think line plot and bar graph

Step-by-step explanation: