URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS

Which descriptions of this function are true? Select 4 that apply.

A. the function is increasing

B. the slop of the function is -4/3 and the y-intercept is 9.

C. the slope of the function is -3/4 and the y-intercept is 7.

D. y= -3/4x + 7 represents this function.

E. the function is linear and continuous.

F. y = 7x -3/4 represents this function.

G. the function is decreasing.

H. the function is linear and discrete.

I. y = -4/3x +9 represents this function

Answers

Answer 1

Answer:

We did this by substituting the slope and point values into the equation

and then solving the equation for b.

We will now show you how you can use either use the slope and a point or just two points to define the equation of the line using point-slope form:

−

(

−

)

This is an important formula, as it will be used in other algebra courses and often in calculus to find the equation of a tangent line. We need only one point and the slope of the line to use the formula. After substituting the slope and the coordinates of one point into the formula, we can simplify it and then write the equation in slope-intercept form.

POINT-SLOPE FORM

Given a point

(

)

and slope m, point-slope form will give the following equation of a line:

−

(

−

)

Now that we know both the slope-intercept form and the point-slope for linear equations, when we are asked to find an equation for a linear function, we can choose which method to use based on the information we are given and our personal preferences. The information provided may be in the form of a graph, a point and a slope, two points, and so on. Let’s look at the graph of the function f below and determine its equation.

Answer 2

A because I think this the best answer

Related Questions

Answer the following questions.

Answers

Answer:

A=60

B=27

Step-by-step explanation:

75% of flights arriving in Memphis are on time if the FAA Selects 60 random flights what is the probability that more than 80% of a simple flights are on time?

Answers

To solve this problem, we will first determine the mean and standard deviation of the distribution of sample proportion.

The mean of the distribution of sample proportion is equal to the population proportion, which is 0.75.

The standard deviation of the distribution of sample proportion is given by:

σ = sqrt[ (p * (1 - p)) / n ]

where p is the population proportion (0.75), and n is the sample size (60).

σ = sqrt[ (0.75 * (1 - 0.75)) / 60 ]
= 0.0625

To find the probability that more than 80% of the sample flights are on time, we will use a z-score calculation.

z = (x - μ) / σ

where x is the value we want to find the probability of, μ is the mean of the distribution (0.75), and σ is the standard deviation of the distribution (0.0625).

z = (0.8 - 0.75) / 0.0625
= 0.8

Using a standard normal table or calculator, we can find that the probability of a z-score of 0.8 or higher is approximately 0.2119.

Therefore, the probability that more than 80% of the sample flights are on time is approximately 0.2119.

Supplementary angles

Answers

Answer: ∠EAI and/or ∠EDG (More listed below lol)

Step-by-step explanation:

Starting Angle: ∠ADE

Possible Supplements: ∠EAI, ∠EDG, ∠DAH, ∠DEC, ∠ADF, and ∠AEB

Please see the attached

Answers

a. Monthly payment for the bank's car loan is $407.67

b. Monthly payment for the savings and loan association's car loan is $315.99

c. Total amount paid would be $2,035 less for the bank's car loan than for the savings and loan association's car loan.

What is interest rate?

The cost of borrowing money, usually expressed as a percentage of the amount borrowed, is what a lender charges a borrower to use their money. This cost is known as an interest rate.

(a) To find the monthly payment for the bank's car loan, we can use the formula for the present value of an annuity:

[tex]PV = PMT * \frac{1 - (1 + \frac{r}{n})^{(-n*t)}}{\frac{r}{n} }[/tex]

putting the given values,

⇒ [tex]21000 = PMT * \frac{1 - (1 + \frac{0.065}{12})^{(-12*5)}}{\frac{0.065}{12} }[/tex]

Solving for PMT, we get:

PMT = $407.67

Therefore, the monthly payment for the bank's car loan is $407.67

(b) To find the monthly payment for the savings and loan association's car loan, we can use the same above formula:

where PV is still $21,000, PMT is the monthly payment, r is still 0.065, n is still 12, but t is now 7 years x 12 months/year = 84 payments.

putting the given values,

[tex]21000 = PMT * \frac{1 - (1 + \frac{0.065}{12})^{(-12*7)}}{\frac{0.065}{12} }[/tex]

Solving for PMT, we get:

PMT = $315.99

Therefore, the monthly payment for the savings and loan association's car loan is $315.99.

Savings and loan association's car loan: $315.99 x 84 = $26,495.16

Therefore, the bank's car loan would have the lowest total amount to pay off, by: $26,495.16 - $24,460.20 = $2,034.96

Therefore, the total amount paid would be $2,035 less for the bank's car loan than for the savings and loan association's car loan.

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Determine the equation of straight line passing through the point (1,0) and (2, - 3)

Answers

first you need to find the gradient of the line and to do that you divide the height of a part of the line by its length. so to find the height we do -3-0=-3 and to find the length we do 2-1=1. then divide -3 by 1 and the gradient is -3. so now we know the equation is y=-3x+b. to find b we replace y with the y coordinate of one of the 2 points. lets take the first point. so it will be 0=-3+b. Now we can easily find b by doing 0-(-3) which is 3. so the equation of the line is y=-3x+3. Also please mark this as brainliest answer if you found it helpful thanks.

Answer:

y = - 3x + 3

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (1, 0 ) and (x₂, y₂ ) = (2, - 3 )

m = [tex]\frac{-3-0}{2-1}[/tex] = [tex]\frac{-3}{1}[/tex] = - 3 , then

y = - 3x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (2, - 3 )

- 3 = - 3(2) + c = - 6 + c ( add 6 to both sides )

3 = c

y = - 3x + 3 ← equation of line

If the first 4 terms of an infinite geometric sequence are 150, 120, 96, and 76.8, then the sum of all the terms in the sequence is ______.

Answers

Answer:

The common ratio of this sequence is 120/150 = 4/5, so we have:

[tex] \frac{150}{1 - \frac{4}{5} } = \frac{150}{ \frac{1}{5} } = 150 \times 5 = 750[/tex]

So the sum of all the terms in this sequence is 750.

a random sample of 50 employees at a large firm has 22 females and 28 males. if the company has 1300 workers, what is the expected number of male workers?

Answers

Step-by-step explanation:

We can use the proportion of males in the sample to estimate the proportion of males in the population, and then use that proportion to find the expected number of male workers.

The proportion of males in the sample is:

p = 28/50 = 0.56

We can use this proportion to estimate the proportion of males in the population:

p' = 0.56

The expected number of male workers is then:

E(X) = n * p'

where n is the total number of workers in the population:

E(X) = 1300 * 0.56

E(X) = 728

Therefore, we would expect there to be approximately 728 male workers in the company.

I need to know the order asap

Answers

The inverse of the function f(x) = 3 · x / (8 + x) is f⁻¹(x) = 8 · x / (3 - x).

How to find the inverse of a function

In this problem we must determine the inverse of a function, this can be done by means of algebra properties. First, write the entire function:

f(x) = 3 · x / (8 + x) (Step 0)

y = 3 · x / (8 + x) (Step 1)

Second, use the following substitutions:

x → y

y → x

x = 3 · y / (8 + y) (Step 2)

Third, clear y within the expression:

x · (8 + y) = 3 · y (Step 3)

8 · x + x · y = 3 · y

8 · x = 3 · y - x · y (Step 4)

8 · x = y · (3 - x)

y = 8 · x / (3 - x)

Fourth, use final notation:

f⁻¹(x) = 8 · x / (3 - x) (Step 5)

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Two partner a and b agree to divide 30% of the total profits equally between than a and the balance in the ratio 3:4.if the profits is rs 30000 find a,s share of the profits.

Answers

well, let's first find out how much is 30% of 30000

[tex]\begin{array}{|c|ll} \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{30\% of 30000}}{\left( \cfrac{30}{100} \right)30000}\implies 9000[/tex]

ok, that means if we split that down the middle, each will get 4500.

so the remaining is 21000, and that's split on a 3:4 ratio, assuming from A to B, so let's simply divide the total 21000 by (3 + 4) and distribute accordingly.

[tex]\stackrel{A}{3}~~ : ~~\stackrel{B}{4} ~~ \implies ~~ \stackrel{A}{3\cdot \frac{21000}{3+4}}~~ : ~~\stackrel{B}{4\cdot \frac{21000}{3+4}}\implies \stackrel{A}{3\cdot 3000}~~ : ~~\stackrel{B}{4\cdot 3000} \\\\\\ \stackrel{A}{9000}~~ : ~~\stackrel{B}{12000}\hspace{9em}\underset{ \textit{share for A} }{\stackrel{ 4500~~ + ~~9000 }{\text{\LARGE 13500}}}[/tex]

Practice: Tell and Write Time-Practice-Level C
Determine if each statement describes the time shown on the clock.
i-Ready
......................
10
9
8
12
11
76
1
5
2
4
3:
(16 minutes before 10:00
»44 minutes after 9:00
Yes
(47 minutes after 8:00
No
» 13 minutes before 10:00 O
13 minutes before 9:00
O
O
00
O
O
O
O

Answers

7:76 - This is not a valid time. There are only 60 minutes in an hour, so the minutes place cannot be 76.

What is time?

Time is a measurable and non-spatial quantity used to describe or quantify the sequence, duration, or occurrence of events. It is a concept used to understand the order in which events occur and to measure the duration of those events.

According to question:

10:44 - Yes, the statement is true. The time is 44 minutes after 10:00.

9:47 - No, the statement is false. The time is 13 minutes before 10:00.

12:13 - Yes, the statement is true. The time is 13 minutes after 12:00.

11:00 - Yes, the statement is true. The time is exactly 11:00.

7:76 - This is not a valid time. There are only 60 minutes in an hour, so the minutes place cannot be 76.

1:05 - Yes, the statement is true. The time is 5 minutes after 1:00.

5:02 - No information is provided about this time on the clock.

2:00 - Yes, the statement is true. The time is exactly 2:00.

4:00 - Yes, the statement is true. The time is exactly 4:00.

3:00 - Yes, the statement is true. The time is exactly 3:00.

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If the sides of a square are increased by 11, the area becomes 400. What is the length of the original side?

Answers

Answer: The length of the original side of the square is 22 units.

Step-by-step explanation:

Let x be the length of the original side of the square.

If the sides are increased by 11, the new side length is x + 11.

The area of the new square is given as 400, so we have:

(x + 11)^2 = 400

Expanding the left side: x^2 + 22x + 121 = 400

Subtracting 400 from both sides: x^2 + 22x - 279 = 0

Using the quadratic formula:

x = (-22 ± sqrt(22^2 - 41(-279))) / (2*1)

x = (-22 ± sqrt(12100)) / 2

x = (-22 ± 110) / 2

Taking the positive solution:

x = (-22 + 110) / 2

x = 44 / 2

x = 22

Each graph below was obtained by transformation(s) of the graph of the cubic function. Write the equation for the function each graph represents.

Correct answer gets brainliest !

Answers

The cubic equation graphed have the functions as follows

3/40(x + 5)^3 - 7 y = 2 - 2/5(x + 0.5)^3

How to write the equation of the functions

Graph of cubic function

The equation of cubic function is

y = a(x - h)^3 + k

For horizontal inflection at (-5, -7)

y = a(x + 5)^3 - 7

passing through point (-1, -3.8)

-3.8 = a(-1 + 5)^3 - 7

4.8 = -64a

a = 4.8/64 = 3/40

hence the equation is: y = 3/40(x + 5)^3 - 7

Graph of cubic function

The equation of cubic function is

y = k - a(x - h)^3

For horizontal inflection at (-0.5, 2)

y = 2 - a(x + 0.5)^3

passing through point (-5, 38.45)

38.45 = 2 - a(-5 + 0.5)^3

38.45 -2 = -a(-4.5)^3

a = -36.45/(-4.5)^3 = 2/5

hence the equation is: y = 2 - 2/5(x + 0.5)^3

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Elnaz rewrote the equation x² - 6x - 18 = 0 so that she can solve by completing the square. Which equation did she write?
A. (x-3)² = -9
B. (x-3)² = 18
C. (x-3)² = 27
D. (x-3)² = 54

Answers

Answer:

Step-by-step explanation:

(x-3)(x-3)=27

x^2-3x-3x+9=27

x^2-6x+9=27

-27. -27

x^2-6x-18=0

Answer:

(x-3)²=27

Step-by-step explanation:

x²+6x-18=0

add 18 to both sides of the equation

To complete the square add 3² to both sides and factor what is on the left side. You will be getting

(x-3)² = 27 is the answer to this problem

Answer:

Step-by-step explanation:

(x-3)(x-3)=27

x^2-3x-3x+9=27

x^2-6x+9=27

-27. -27

x^2-6x-18=0

Answer:

(x-3)²=27

Step-by-step explanation:

x²+6x-18=0

add 18 to both sides of the equation

To complete the square add 3² to both sides and factor what is on the left side. You will be getting

(x-3)² = 27 is the answer to this problem

The lateral area of a cone is 473pi cm^2. The radius is 43 cm. Find the height to the nearest tenth

Answers

The slant height of the cone is about 11 cm. Using the Pythagorean theorem, the height is approximately 41.4 cm to the nearest tenth.

Use the formula for the lateral area of a cone: L = πrs, where L is the lateral area, r is the radius of the base, and s is the slant height.

Plug in the given values: L = 473π cm² and r = 43 cm. Then solve for s

L = πrs

473π = π(43)s

s = 473/43 ≈ 11

So the slant height of the cone is approximately 11 cm.

Use the Pythagorean theorem to find the height of the cone. Let h be the height of the cone. Then the Pythagorean theorem gives

h² + s² = r²

Substituting in the values for s and r, we get

h² + 11² = 43²

Simplifying this equation, we get

h² = 43² - 11²

Evaluating the right-hand side, we get

h² = 1764

Taking the square root of both sides, we get

h ≈ 41.4

So the height of the cone is approximately 41.4 cm to the nearest tenth.

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A hiker travels 6 mph, which is 3/11 of the rate of a cyclist.Suppose the hiker and cyclist are traveling toward each other.How fast does the distance between them decrease?

Answers

Answer:

28 mph

Step-by-step explanation:

let x= rate of cyclist

3/11(x)=6

x=66/3=22 mph

22mph+ 6mph=28 mph

they move towards each other with a relative speed of 28 mph

When Caroline runs the 400 meter dash, her finishing times are normally distributed with a mean of 68 seconds and a standard deviation of 1.5 seconds. Using the empirical rule, determine the interval of times that represents the middle 99.7% of her finishing times in the 400 meter race.

Answers

The interval of times that represents the middle 99.7% of Caroline's finishing times is (63.5, 72.5) seconds

How to calculate the interval

In this case, we are looking for the interval of times that represents the middle 99.7% of Caroline's finishing times.

The middle 99.7% of the data corresponds to three standard deviations from the mean in both directions

Three standard deviations from the mean is 3 x 1.5 = 4.5 seconds.

Therefore, the interval of times that represents the middle 99.7% of Caroline's finishing times is (68 - 4.5, 68 + 4.5) = (63.5, 72.5) seconds

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Prepare a statement of cash flows for Business Solutions using the indirect method for the three months ended March 31, 2022. Owner Santana Rey contributed $25,000 to the business in exchange for additional stock in the first quarter of 2022 and has received $4,800 in cash dividends.

Answers

It is 47 because division

Felicia is deciding on her schedule for next semester. She must take each of the following classes: English 102, Spanish 102, History 102, and College Algebra. If there are 15 sections of English 102, 9 sections of Spanish 102, 12 sections of History 102, and 13 sections of College Algebra, how many different possible schedules are there for Felicia to choose from? Assume there are no time conflicts between the different classes.

Answers

Okay, here are the steps to solve this problem:

* There are 15 sections of English 102 to choose from

* There are 9 sections of Spanish 102 to choose from

* There are 12 sections of History 102 to choose from

* There are 13 sections of College Algebra to choose from

So for English 102 Felicia has 15 options, for Spanish 102 she has 9 options, for History 102 she has 12 options, and for College Algebra she has 13 options.

By the Fundamental Principle of Counting, the total number of possible schedules is:

15 * 9 * 12 * 13 = 16,920

Therefore, the total number of possible schedules for Felicia is 16,920

please help me!!!!!!

Answers

Answer:2nd one

Step-by-step explanation:

A pool measuring 18 meters by 30 meters is surrounded by a path of uniform width, as shown in the
figure. If the area of the pool and the path combined is 1900 square meters, what is the width of
the path?

Answers

The width of the path is approximately 7.45 meters.

What is meant by width?

The width refers to the measurement of something from side to side, typically in a direction perpendicular to its length or height, such as the width of a door or the width of a piece of paper.

What is meant by meters?

Meters are a unit of measurement used to measure the length in the metric system. One meter is equal to 100 centimetres or approximately 3.28 feet. It is commonly used to measure distances, heights, and lengths.

According to the given information

The area of the pool is given by the product of its length and width:

18 × 30 = 540 square meters

The area of the entire region, including the pool and the path, is given by the product of the length and width of the outer rectangle:

(18 + 2x) × (30 + 2x)

Expanding this expression, we get:

540 + 36x + 60x + 4x²

Simplifying, we get:

4x² + 96x + 540

We are given that the area of the entire region is 1900 square meters:

4x² + 96x + 540 = 1900

Subtracting 1900 from both sides, we get:

4x² + 96x - 1360 = 0

Dividing both sides by 4, we get:

x² + 24x - 340 = 0

We can use the quadratic formula to solve for x:

x = (-24 ± √(24² - 4 × 1 × (-340))) / (2 × 1)

Simplifying, we get:

x = (-24 ± √(1216)) / 2

x ≈ -17.45 or x ≈ 7.45

Since the width of the path cannot be negative, we can ignore the negative solution.

Therefore, the width of the path is approximately 7.45 meters.

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An archaeologist found a fossil whose length is489.44 in.
Consult the conversion table to calculate the length of the fossil infeet.
Round your answer to the nearest tenth.

Answers

If the archaeologist found a fossil whose length is 489.44 inches, using the conversion table, the length in feet, to the nearest tenth, is 40.8 feet.

What is the conversion table?

The conversion table refers to the tabulated standard units of measurement, showing temperature, length, area, volume, weight, and metric conversions

For instance, the conversion table shows that 12 inches equal 1 foot.

The length of the fossil = 489.44 inches

12 inches = 1 foot

489.44 inches = 40.8 feet (489.44 ÷ 12)

Thus, using the conversion table, which relies on multiplication or division operations using the conversion factors, the length in feet of the fossil is 40.8 feet.

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find the area of the shaded region round to the nearest hundredth where necessary 23.8 21 15

Answers

To find the area of the shaded region, we need to subtract the area of the smaller semicircle from the area of the larger semicircle, and then subtract the area of the triangle.

First, we need to find the radii of the two semicircles. The larger semicircle has a diameter of 23.8, so its radius is 23.8/2 = 11.9. The smaller semicircle has a diameter of 15, so its radius is 15/2 = 7.5.

The area of the larger semicircle is (π/2)(11.9)^2 ≈ 222.93 square units.

The area of the smaller semicircle is (π/2)(7.5)^2 ≈ 44.18 square units.

Next, we need to find the area of the triangle. We can use the Pythagorean theorem to find the height of the triangle:

h^2 = 11.9^2 - 7.5^2
h^2 ≈ 72.16
h ≈ 8.49

The base of the triangle is 21, so the area of the triangle is (1/2)(21)(8.49) ≈ 89.29 square units.

Finally, we can find the area of the shaded region by subtracting the area of the smaller semicircle from the area of the larger semicircle, and then subtracting the area of the triangle:

222.93 - 44.18 - 89.29 ≈ 89.46

Therefore, the area of the shaded region is approximately 89.46 square units, rounded to the nearest hundredth.

Review the information given based on a principal balance of $8,000 to answer the question:

FICO Score Simple Interest Rate Total # of Payments Total Amount Paid
800–850 12% 29 $9,256.00
740–799 15% 33 $9,812.00
670–739 18% 38 $10,554.00
580–669 21% 48 $11,891.00
300–579 28% 60 $14,945.00

Calculate how much more a household with a credit score of 525 will pay compared to a household with a credit score of 675.

Answers

a household with a credit score of 525 would pay $4,280.82 more than a household with a credit score of 675 for a principal balance of $8,000.

what is principal balance ?

Principal balance refers to the amount of money that you still owe on a loan or debt, not including any interest or fees that have accrued. When you make a payment towards your loan or debt, a portion of the payment goes towards paying down the principal balance,

In the given question,

To calculate the difference in payment between a household with a credit score of 525 and one with a score of 675, we need to compare the total amount paid for each score range.

For a principal balance of $8,000, based on the given information:

A household with a credit score of 525 would have a simple interest rate of 28%, and would make 60 payments of $249.08 each, for a total amount paid of $14,945.00.

A household with a credit score of 675 would have a simple interest rate of 18%, and would make 38 payments of $280.61 each, for a total amount paid of $10,664.18.

The difference in payment between these two scores would be:

$14,945.00 - $10,664.18 = $4,280.82

Therefore, a household with a credit score of 525 would pay $4,280.82 more than a household with a credit score of 675 for a principal balance of $8,000.

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Exercise
find the truth set of the
1.5(3x-5)-2(x-7)=11

Answers

Que ódio de mim e eu não sei se você não tem a sua mãe e eu não tem a sua vida que você está com o contato do cara do pai e a gente vai se ver e te aviso tá tá ai quando foi que eu vou fazer o contato do cara do pai e a gente vai se

On Friday, three friends shared how much they read during the week
Barbara read the first 100 pages from a 320-page in the last 4 days
Judy read the first 54 pages from a 260-page book in the last 3 days.
Nancy read the first 160 pages from a 480-page book in the last 5 days

Order the friends from the first one who is predicted to finish her book to the third one who is predicted to finish her book(Show all work)

Answers

The friends from the first one who is predicted to finish her book to the third one who is predicted to finish her book is given by the order Nancy > Barbara > Judy

Given data ,

The total number of pages in each friend's book as follows:

Barbara's book: 320 pages

Judy's book: 260 pages

Nancy's book: 480 pages

Now, we can calculate their reading rates as pages read per day:

Barbara's reading rate: 100 pages / 4 days = 25 pages/day

Judy's reading rate: 54 pages / 3 days = 18 pages/day

Nancy's reading rate: 160 pages / 5 days = 32 pages/day

Hence , the descending order is Nancy > Barbara > Judy

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You want to buy a $12,000 car. The company is offering a 2% interest rate for 48 months (4 years). What
will your monthly payments be?

Answers

Answer:

240

Step-by-step explanation:

1. (i) Find the first 3 terms in the expansion of (2 - y)^5 in ascending powers of y.
(ii) Use the result in part (i) to find the coefficient of x² in the expansion of (2 − (2x - x²))^5.

Answers

1) The first three terms in the expansion of [tex](2 - y)^{5}[/tex] in ascending powers of y are as follows:

32, -80y, and [tex]80y^2[/tex]

2)The [tex]x^{2}[/tex] coefficient in the expansion of (2 (2x - [tex]x^{2}[/tex]))5 is 80.

What is the binomial theorem?

As the power increases, the expansion gets more difficult to compute. The Binomial Theorem can be used to easily calculate a binomial statement that has been raised to very big power.

(i) Using the binomial theorem, we can expand [tex](2 - y)^{5}[/tex] as follows:

[tex](2 - y)^{5}[/tex] = [tex]2^{5} - 5(24)y^{1} + 10(23)y^{2} + 10(23)y^{3} + 5(2)y^{4} - y^{5}[/tex]

By combining the powers of two and simplifying, we get:

[tex]32 - 80y + 80y^{2} - 40y^3 + 10y^4 - y^5[/tex]

As a result, the first three terms in the expansion of [tex](2 - y)^{5}[/tex] in ascending powers of y are as follows:

32, -80y, and [tex]80y^2[/tex]

(ii) Using the result of section (i), we can expand [tex](2 - (2x - x^{2} ))^{5}[/tex] by substituting y with 2x - x2:

[tex](2 - (2x - x^2))^5 = 2^5 - 5(2^4)(2x - x^2) + 10(2^3)(2x - x^2)^2 - 10(2^2)(2x - x^2)^3 + 5(2)(2x - x^2)^4 - (2x - x^2)^5[/tex]

By combining the powers of two and simplifying, we get:

[tex]32 - 80x + 80x^2 - 40x^3 + 10x^4 - x^5[/tex]

As a result, the [tex]x^{2}[/tex] coefficient in the expansion of (2 (2x - [tex]x^{2}[/tex]))5 is 80.

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A teacher asks her students to find an expression for the number of tiles needed to
surround such a square pool, and sees the following responses from her students:
4(s+1)
s²
4s+4
2s+2(s+2)
4s
Is each mathematical model correct or incorrect? How do you know?

Answers

The correct mathematical expression to find the number of tiles needed to surround a square pool would depend on how the tiles are arranged and how the dimensions of the pool and the tiles are related.

4(s+1): This expression appears to be correct if we assume that each side of the square pool is surrounded by a row of tiles, and each corner requires an additional tile.

So, the expression can be simplified to 4s+4. This is a valid expression for the number of tiles needed to surround the pool.

s²: This expression does not appear to be correct, as it only gives the area of the square pool, and does not take into account the dimensions of the tiles or the need to surround the pool.

4s+4: This expression is the same as the first expression, 4(s+1), and is a valid expression for the number of tiles needed to surround the pool.

2s+2(s+2): This expression appears to be incorrect, as it gives the total perimeter of the pool plus an additional 4 units, but does not take into account the size of the tiles or the need to surround the pool.

4s: This expression is incorrect, as it only gives the perimeter of the pool and does not take into account the need to surround the pool with tiles.

Thus, two of the given expressions (4(s+1) and 4s+4) are correct, one expression (s²) is incomplete, and two expressions (2s+2(s+2) and 4s) are incorrect.

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Giving a test to a group of students, the grades and gender are summarized below

A B C Total
Male 12 15 4 31
Female 9 8 16 33
Total 21 23 20 64
If one student is chosen at random, find the probability that the student was male GIVEN they got a 'C':

Answers

Answer: [tex]\frac{1}{5}[/tex]

Step-by-step explanation:

Males who got a C = 4

Total amount of people who got a C = 20

[tex]\frac{4}{20}[/tex]

[tex]\frac{4}{20}[/tex] simplifies to [tex]\frac{1}{5}[/tex]

To find the probability that the student was male given they got a 'C', we need to use Bayes' theorem. Bayes' theorem states that:

P(A|B) = P(B|A) * P(A) / P(B)

where P(A|B) is the probability of event A given event B, P(B|A) is the probability of event B given event A, P(A) is the prior probability of event A, and P(B) is the prior probability of event B.

In this case, event A is "the student is male" and event B is "the student got a 'C'". We are given the following information:

- P(A) = 31/64 (the prior probability of a student being male)
- P(B|A) = 4/31 (the probability of getting a 'C' given the student is male)
- P(B) = 20/64 (the prior probability of getting a 'C')

Using Bayes' theorem, we can calculate P(A|B) as:

P(A|B) = P(B|A) * P(A) / P(B)
P(A|C) = (4/31) * (31/64) / (20/64)
P(A|C) = 4/20
P(A|C) = 0.2

Therefore, the probability that the student was male given they got a 'C' is 0.2 or 20%.

Can someone please help me

Answers

The height of point A is 0 feet. However, this is not the actual height of point A, as it is at the highest point on the Ferris Wheel, which is 185 feet as calculated previously.

How to solve

The height of point A on the Ferris Wheel can be calculated using the sine function, as it is the vertical component of the point's position. The center of the Ferris Wheel is 100 feet off the ground, and its radius is 85 feet.

Let's denote the height of point A as h_A, which is the vertical distance from the center of the Ferris Wheel to point A.

Since point A is at the 0 radian position, it is at the highest point on the Ferris Wheel. At this point, the height of point A is equal to the sum of the radius and the center's height:

h_A = radius + center's height

h_A = 85 + 100

h_A = 185 feet

So, the height of point A off the ground is 185 feet.

To estimate the value of h_A using the sine function, we can use the fact that at any given angle θ on the unit circle, the height of the point on the circle is given by the sine of that angle multiplied by the radius. In this case, since point A is at the highest point on the Ferris Wheel, we can use the sine of 0 radians (which is 0) to estimate the height of point A:

h_A = radius * sin(0)

h_A = 85 * 0

h_A = 0

So, using the sine function, we estimate that the height of point A is 0 feet. However, this is not the actual height of point A, as it is at the highest point on the Ferris Wheel, which is 185 feet as calculated previously.