In a class of 20 children, 8 had one sister, 6 had 2 sisters. The mean number of children was 1. how many children had no sisters

The equatiοn οf the circle is (x + 6)(x+6) + (y + 2)(y+2) = 9.

A circle is a twο-dimensiοnal geοmetric figure that cοnsists οf all pοints that are equidistant frοm a single fixed pοint called the center. A circle can alsο be defined as the lοcus οf a pοint that mοves in a plane in such a way that its distance frοm a fixed pοint is always cοnstant.

Tο find the equatiοn οf a circle, we need the cοοrdinates οf the center and the radius.

The center οf the circle is given as (-6, -2), sο the cοοrdinates οf the center are (h, k) = (-6, -2).

The pοint (-9, -2) is οn the circle, sο its distance frοm the centre is equal tο the radius. We can use the distance fοrmula tο find the radius:

[tex]\rm r = \sqrt{((x_2 - x_1)\times (x_2 - x1) + (y_2 - y_1)\times(y_2 - y_1))}[/tex]

[tex]= \sqrt{((-3)^2 + 0^2)[/tex]

= 3

Therefοre, the radius οf the circle is 3.

Nοw we can use the standard fοrm οf the equatiοn οf a circle, which is:

(x - h)(x-h)+ (y - k)(y-k)= r*r

Substituting the values we fοund, we get:

Simplifying:

(x + 6)(x+6) + (y + 2)(y+2) = 9

Therefοre, The equatiοn οf the circle is [tex](x + 6)(x+6) + (y + 2)(y+2) = 9[/tex].

To learn more about Circle from given link.

https://brainly.com/question/266951

#SPJ1

Answer:

Step-by-step explanation:

divide both by 100 to get

3072/1

answer: 3072

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

Answer:  [tex]\textsf{B (-3), C (3), and D (24)}[/tex]

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

Given:  [tex]\textsf{8(x - 3) = 2x + b + 6x}[/tex]

Find: [tex]\textsf{Which values for b are not a solution}[/tex]

Solution: In order to make it easier for us to determine the answer, let us first simplify the expression that was given to us.  We can do that by first combining like terms on the right side of the equation and distributing the 8 on the left side of the equation.

We can now subtract 8x from both sides of the equation.

Now that we know that b is equal to -24, that means that any value other than -24 would cause the equation to have no solutions.  Therefore, the correct answer would be B (-3), C (3), and D (24).

Therefore, the probability that AT LEAST ONE of them has been vaccinated is 0.98693

If 58% = 58÷100 of the people have been vaccinated, then;

1 - (58/100) = 42% = 42÷100 of the people who have not been vaccinated.

Now:

Probability, P( > 1 ), that at least one of the selected four has been vaccinated is given by;

P( > 1 ) = 1 - P(0)                 -----------(1)

Where;

P(0) = probability that all of the four have not been vaccinated.

P(0) = P(1) x P(2) x P(3) x P(4)×p(5)

Where;

P(1) = Probability that the first out of the four has not been vaccinated

P(2) = Probability that the second out of the four has not been vaccinated

P(3) = Probability that the third out of the four has not been vaccinated

P(4) = Probability that the fourth out of the four has not been vaccinated

P(5)=Probability that the fifth out of the five has not been vaccinated

Remember that 42÷100 of the population has not been vaccinated. Therefore,

P(1) = 42÷100    

P(2) = 42÷100

P(3) = 42÷100

P(4) = 42÷100

P(5)=42÷100

P(0) = (42÷100) x (42÷100) x (42÷100) x (42÷100)×(42÷100)

P(0) = (42÷100)⁵

P(0) = (0.42)⁵

P(0) = 0.013067

Therefore, from equation (1);

P( > 1 ) = 1 -0.013067

P( > 1 ) = 0.98693

Therefore, the probability that AT LEAST ONE of them has been vaccinated is 0.98693

learn more about Probability,

https://brainly.com/question/11234923

#SPJ1

Answer:

x-3

Step-by-step explanation:

For the given cone, the approximate volume of the toy top is 106.81 cubic centimeters. The three dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex.

Volume is a three-dimensional quantity that measures the amount of space occupied by an object or a region in space.

The volume of the toy top can be calculated by finding the volumes of the cone and cylinder and then adding them together.

The volume of the cone is given by the formula V = (1/3)π[tex]r^{2}[/tex]h, where r is the radius and h is the height of the cone. In this case, the slant height is given, so we need to use the Pythagorean theorem to find the height:

h = [tex]\sqrt{(l^2 - r^2)[/tex] = [tex]\sqrt{(10^2 - 6^2)[/tex] = √(64) = 8 cm

Therefore, the volume of the cone is:

V_cone = (1/3)π[tex]r^2[/tex]h = (1/3)π([tex]6^2[/tex])(8) ≈ 100.53 [tex]cm^3[/tex]

The volume of the cylinder is given by the formula V = π[tex]r^2[/tex]h, where r is the radius and h is the height of the cylinder. In this case, the diameter is given, so we need to divide by 2 to get the radius:

V_cone = (1/3)πh = (1/3)πr = d/2 = 1 cm = 2 cm

Therefore, the volume of the cylinder is:

V_cylinder = π[tex]r^{2}[/tex]h = π([tex]1^{2}[/tex])(2) ≈ 6.28

The total volume of the toy top is:

V = V_cone + V_cylinder ≈ 100.53 + 6.28  ≈  106.81 T

Therefore, the approximate volume of the toy top is 106.81 cubic centimeters.

To know more about cone, visit

brainly.com/question/1082469

#SPJ1

The position of the particle at time t = 1 would be -1.

To find the position of the particle at time t = 1, we need to integrate the velocity function v(t) from t = 0 to t = 1, and add it to the initial position x = -2:

x(1) = -2 + ∫[0,1] v(t) dt

Integrating v(t), we get:

x(1) = -2 + ∫[0,1] (6t² + 8t - 5) dt

x(1) = -2 + [2t³ + 4t² - 5t] from 0 to 1

x(1) = -2 + [2(1)³ + 4(1)² - 5(1)] - [2(0)³ + 4(0)² - 5(0)]

x(1) = -2 + [2 + 4 - 5]

x(1) = -2 + 1

x(1) = -1

Therefore, the position of the particle at time t = 1 is -1.

More on particle position can be found here: https://brainly.com/question/29187130

#SPJ1

The sides of the triangle are a ≈ 8.3, b = 7, and c = 10, and the angles are A = 51°, B ≈ 51.5°, and C ≈ 77.5°.

A triangle is a closed, double-symmetrical shape composed of three line segments known as sides that intersect at three places known as vertices. Triangles are distinguished by their sides and angles.

To solve the triangle, we need to find the values of the remaining sides and angles. We can start by using the Law of Sines, which states that:

a / sin A = b / sin B = c / sin C

where a, b, and c are the sides of the triangle, and A, B, and C are the angles opposite to those sides.

Using the given values, we can write:

a / sin 51 = 7 / sin B

a / sin 51 = 10 / sin C

To solve for a, we can use either of the two equations above. Let's use the first one and solve for sin B:

sin B = (7 / sin 51) * sin B

sin B = 7 / (sin 51 / sin B)

sin B = 7 / sin(180 - 51 - B)

sin B = 7 / sin(129 - B)

Using the sine rule, we can determine the angle B:

sin B / 7 = sin(129 - B) / 10

sin B = (7/10) * sin(129 - B)

sin B = (7/10) * (sin 129 * cos B - cos 129 * sin B)

sin B = (7/10) * sin 129 * cos B - (7/10) * cos 129 * sin B

(7/10 + (7/10) * cos 129) * sin B = (7/10) * sin 129 * cos B

sin B = (7/10) * sin 129 * cos B / (7/10 + (7/10) * cos 129)

sin B = sin 51.5

B = sin(sin B)

B = sin(sin 51.5)

B ≈ 51.5°

We can now find the remaining angle, C:

C = 180 - A - B

C = 180 - 51 - 51.5

C ≈ 77.5°

Finally, we can use the Law of Sines again to find the remaining side, a:

a / sin A = c / sin C

a / sin 51 = 10 / sin 77.5

a = (10 * sin 51) / sin 77.5

a ≈ 8.3

Therefore, the sides of the triangle are a ≈ 8.3, b = 7, and c = 10, and the angles are A = 51°, B ≈ 51.5°, and C ≈ 77.5°.

To know more about triangle visit:

brainly.com/question/2773823

#SPJ1

To find the price of the chair in the furniture store, we need to calculate the retail price, which is the wholesale price plus the markup. The markup is calculated by multiplying the wholesale price by the markup rate as a decimal:

markup = 0.22 x $181 = $39.82

So the retail price is:

$181 + $39.82 = $220.82

Rounding to the nearest cent, we get the final answer:

The price of the chair in the furniture store is $220.82.

Anand's business charges $25 for a 10-mile ride, which is less than Moussa's overall expenses.

In comparison to Moussa, Anand's business costs less per mile.

Let's examine why by contrasting the costs charged by the two businesses for a 10-mile trip:

With a $3 pick-up fee and $2.20 per mile,

Moussa's business costs a total of $3 + $2.20*10 = $25.

Less than Moussa's overall expense,

Anand's business charges $25 for a 10-mile ride.

For all other distances mentioned in the table, we can verify that Anand's business charges less per mile than Moussa's. Thus, it is accurate that

"Anand's company charges less per mile than Moussa's."

Learn more about the total cost here:

https://brainly.com/question/30355738

#SPJ1

Answer:

2

Step-by-step explanation:

2 appears the most as we can see theres only

two 0

and few of the other numbers

mode is the most common number in the list of any given numbers like the one abpve

The solution to the triangle is: a ≈ 22.4, b = 4 , c ≈ 77.2 ,A = 27° ,B ≈ 42.5°

C ≈ 110.5°  we got the answer by using law of sine

what is  law of sine?

The Law of Sines, also known as the Sine Rule, is a mathematical formula used in trigonometry to relate the sides and angles of a non-right-angled triangle. It states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides of the triangle.

In the given question,

Using the law of sines and the fact that the angles of a triangle sum up to 180 degrees, we can solve for the missing parts of the triangle:

sin(A)/a = sin(B)/b = sin(C)/c

sin(27)/a = sin(B)/42 = sin(C)/72

We can use the first equation to solve for a:

a = b(sin(A)/sin(B)) = 42(sin(27)/sin(B)) ≈ 22.4161

Next, we can use the second equation to solve for sin(B):

sin(B) = b(sin(A)/a) = 42(sin(27)/a) ≈ 0.6822

Taking the inverse sine, we find that B ≈ 42.4827 degrees.

Now we can use the fact that the angles of a triangle sum up to 180 degrees to solve for C:

C = 180 - A - B ≈ 110.5173 degrees.

Finally, we can use the law of sines again to solve for the remaining side, c:

c = a(sin(C)/sin(A)) = 22.4161(sin(110.5173)/sin(27)) ≈ 77.2352

Therefore, the solution to the triangle is:

a ≈ 22.4

b = 42

c ≈ 77.2

A = 27°

B ≈ 42.5°

C ≈ 110.5°

To know more about law of sine , visit:

https://brainly.com/question/17289163

#SPJ1

Answer:

-2x × 10^1 + 8 × 10^0

or

-2x × 10 + 8 × 1

Step-by-step explanation:

Multiply the following to put them in standard form

-4 (5x-2)=

-20x +8

standard form

-2x × 10^1 + 8 × 10^0

or

-2x × 10 + 8 × 1   (remember  PEMDAS)

Step-by-step explanation:

because the circle arcs are equal, it also means that the lengths of the chords (WV and XY) are equal.

9x - 34 = 4x + 1

5x - 34 = 1

5x = 35

x = 35/5 = 7

Answer: No, you cannot always divide by e^x. When e^x equals zero, dividing by it would result in an undefined value or division by zero error.

For example, consider the function f(x) = e^x. We know that e^x is never equal to zero for any value of x. Therefore, we can always divide by e^x for any value of x, and the resulting quotient will be well-defined.

However, if we consider the function g(x) = 1 / e^x, we cannot always divide by e^x. When e^x equals zero, g(x) will be undefined. In fact, there is no value of x for which e^x is equal to zero, so the function g(x) is well-defined for all values of x.

In summary, dividing by e^x is allowed for most cases, except when e^x equals zero.

Step-by-step explanation:

The answer is 0.351

To estimate the proportion p of American adults with monthly credit card debt, the sample proportion can be used as an estimate. The sample ratio is simply the number of people in the sample with monthly credit card debt divided by the total number of people in the sample.

p hat = 587/1669

p-hat = 0.3511 (rounded to four decimal places)

Therefore, based on this sample, the percentage of adult Americans with monthly credit card debt is estimated to be approximately 0.351. After rounding to three decimal places, its estimate is 0.351.

To know more about proportion visit : https://brainly.com/question/30657439

#SPJ1

Answer:

33 - 24x

Step-by-step explanation:

a. He made mistake here

9+(4)(5x+-6)

b.

9 - 4(5x - 6)

= 9 + (- 4)(5x - 6)

= 9 + (- 4)(5x) - (- 4)(6)

= 9 + (- 20x) - (- 24)

= 9 - 20x + 24

= 9 + 24 - 24x

= 33 - 24x

The probability of selecting a divisor of 6 is 66.7%.

It is expressed as a number between 0 and 1, where 0 represents an impossible event (it will never occur) and 1 represents a certain event (it will always occur).

1, 2, 3, and 6 can be divided by 6.

To find the probability (p) of selecting a divisor of 6, we need to divide the number of divisors of 6 by the total number of possible outcomes, which is also 6 (since there are 6 positive integers from 1 to 6).

So, p(divisor of 6) = number of divisors of 6 / total number of outcomes

= 4 / 6

= 2 / 3

We can multiply this fraction by 100 to get the percentage:

p(divisor of 6) = 2 / 3 * 100

= 66.7%

Rounded to the nearest tenth, the answer is 66.7%. Therefore, the probability of selecting a divisor of 6 is 66.7%.

To know more about probability visit:

https://brainly.com/question/29221515

#SPJ1

P(X >= 15) ≈ 0.271 is an unusual event would be one that has a very low probability of occurring (e.g., less than 5%).

What is probability?

Probability is a numerical measurement that represents the likelihood or chance of an event happening. The value of probability always lies between 0 and 1, where 0 indicates that the event is impossible and 1 indicates that the event is certain to occur.

a) To find the probability that at least 15 out of 18 U.S. college graduates expect to stay at their first employer for three or more years, we can also use the CDF of the binomial distribution:

P(X >= 15) = 1 - P(X < 15)

Using a calculator or statistical software, we find:

P(X >= 15) ≈ 0.271

An unusual event would be one that has a very low probability of occurring (e.g., less than 5%). Therefore, these outcomes could be considered unusual.

To learn more about probability visit:

https://brainly.com/question/24756209

#SPJ1

Answer: 28/52

Step-by-step explanation: its easy

Answer:

28/52. You will get it right.

Answer:

Step-by-step explanation:

Given the figure with triangle ABC similar to triangle EDC and AB=8 mi, ED=2 mi, BD = 7.5 mi, you want the measures of CD and AE.

Similar triangles will have corresponding sides proportional. That means ...

  ED/CD = AB/CB

  2/CD = 8/(7.5 -CD)

Inverting the ratios and multiplying by 8 gives ...

  4·CD = 7.5 -CD

  5·CD = 7.5 . . . . . . . add CD

  CD = 1.5 . . . . . . . . . divide by 5

The distance AE is the hypotenuse of a right triangle with side lengths 7.5 and (8+2) = 10. The Pythagorean theorem can be used to find AE:

  AE² = 7.5² +10² = 56.25 +100 = 156.25

  AE = √156.25 = 12.5

AE = 12.5 miles, the distance to the mall.

__

Additional comment

You may recognize these triangles are 3-4-5 triangles. ABC has a scale factor of 2, so has side lengths 6-8-10. EDC has a scale factor of 1/2, so has side lengths 1.5, 2, 2.5. The triangle with AE as its hypotenuse is the sum of these, so has a scale factor of 2.5 (miles).

  AE = (2.5 miles) · 5 = 12.5 miles

The area of the shaded region is 1.916 ft²

Area is a measure of the amount of space inside a two-dimensional shape, such as a square, rectangle, triangle, circle, or any other shape that has a length and a width. It is usually measured in square units, such as square inches, square feet, or square meters.

To calculate the area of the shaded region, we need to find the area of the entire circle and subtract the area of the unshaded portion.

The central angle corresponding to the shaded region is 110 degrees. The entire circle has a central angle of 360 degrees.

The unshaded portion of the circle is the sector that corresponds to the central angle of 360 - 110 = 250 degrees. The area of a sector of a circle with radius r and central angle θ is given by the formula:

A = (θ/360)πr²

Substituting θ = 110 degrees and r = 2 ft, we get:

A = (110/360)π(2)

A =  (0.305)π(2)

A =  (0.305)π(2)

A = 0.61π

A = 1.916 ft²

Therefore, the area of the shaded region is 1.916 ft².

To learn more about Area from given link.

https://brainly.com/question/12187609

#SPJ1

Complete question:

Calculate the area of the shaded region. the apothem is 2 ft, and the shaded area is 110 degrees. the figure is a circle

Answer:

[tex]\frac{13}{21}[/tex]

Hope this helps!

Step-by-step explanation:

[tex]\frac{39}{63}[/tex]  ( Simplify both numerator and denominator by 3 )

39 ÷ 3 / 63 ÷ 3

[tex]\frac{13}{21}[/tex]

The total area of construction paper needed for the project is:

180.25 + 127.5833... = 307.8333... square inches (rounded to four decimal places)

Area is the measure of the amount of surface inside a closed boundary, usually measured in square units. It is used to express the size or extent of a two-dimensional region or shape, such as a square, rectangle, circle, or triangle.

To find the total area of the construction paper needed for the project, we need to find the area of each rectangle and then add them together.

For the first rectangle with dimensions of 12 inches by 15 1/4 inches, the area is:

12 × 15 1/4 = 180 + 45/4 = 180.25 square inches

For the second rectangle with dimensions of 10 1/3 inches by 10 1/4 inches, the area is:

10 1/3 × 10 1/4 = (31/3) × (41/4) = 127.5833... square inches (rounded to four decimal places)

Therefore, the total area of construction paper needed for the project is:

180.25 + 127.5833... = 307.8333... square inches (rounded to four decimal places)

To learn more about Area from the given link

https://brainly.com/question/25292087

#SPJ1

Answer: (-3, 0)

Step-by-step explanation:

         First, we will graph these equations. See attached. One has a y-intercept of 3 and then moves right one unit for every up down (we get this from the slope of 1). The other has a y-intercept of 4, and then moves down two units for every unit right (we get this from the slope of 1).

         The point of intersection is the solution, this is the point at which both graphed lines cross each other. Our solution is:

                         (-3, 0)     x = -3, y = 0

Answer:

(-3, 0)

Step-by-step explanation:

When we graph the equations:

y = x + 3,

y = -2 - 6,

we can see that they intersect at (-3, 0).

Therefore, that is the solution to the system.

— Extra note —

When graphing a line from a slope-intercept form equation (y = mx + b), we know the following:

m is the line's slope (rise over run)

b is the y-coordinate of the line's y-intercept

Answer:16.7

Step-by-step explanation: So the first step is to add all of the numbers in the second column. (15,18,14,16,19,18). At the end of your problem it says 100. So you have 6 different numbers, and 100. You will do 100 divided by 6. Finally you will get 16.66 and you will just round it.

Answer:

98+x=154

x=154-98

x=56

x-4=20

x=20+4

x=24

x+25=-10

x=-10-25

x=-35

Answer:

  "time and a half" workers were paid 50% more per day

Step-by-step explanation:

You want to know the relative daily pay rates of laborers making time and a half versus those who were not. 4 getting time and a half and 20 not earned a total of $2080, while 2 getting time and a half and 15 not earned a total of $1440.

We can let x and y represent the daily pay of time and a half workers, and those not earning time and a half. The two payrolls can be described by ...

  4x +20y = 2080

  2x +15y = 1440

Subtracting the first equation from 2 times the second, we have ...

  2(2x +15y) -(4x +20y)  = 2(1440) -(2080)

  10y = 800 . . . . . . . simplify

  y = 80 . . . . . . . . . . divide by 10

  2x +15(80) = 1440

  2x = 240 . . . . . . . . . . subtract 1200

  x = 120 . . . . . . . . divide by 2

Workers getting time and a half made $120 per day; workers not getting time and a half made $80 per day. Workers getting time and a half made half again as much as those who didn't: $40 per day more, or 50% more, or half-again as much.

__

Additional comment

"Time and a half" means the pay is 50% more. That's what we see here. You don't need any math to say those getting time and a half were getting 50% more per day.

Answer:1,208 square centimeters

Step-by-step explanation: