The students at Kayla's school are forming teams of three students for a quiz bowl competition. Kayla is assuming that each member of a team is equally likely to be male or female. She uses a coin toss (heads = female, tails = male) to simulate this probability. Here is Kayla's data from 50 trials of 3 coin tosses:



thh tth tth tht thh htt hth hht hth tth tth hht hth tht tht tth tth thh thh htt tht thh tth hht hth thh tht tth hht thh hhh tth tth hth htt tht thh hhh htt thh htt ttt tht ttt thh hht hth htt hht hth



According to this data, what is the experimental probability that a team will consist of two girls and a boy?

0.33
0.375
0.23
0.46

Answer:

49

Step-by-step explanation:

[tex]\int\limits^{12}_0 {-0.002t^{2} +0.7t} \, dt \\=(-0.002\frac{{12}^{3} }{3} )+(0.7\frac{{12}^{2} }{2} )\\-(-0.002\frac{{0}^{3} }{3} )-(0.7\frac{{0}^{2} }{2} )\\\\=(-0.002\frac{{12}^{3} }{3} )+(0.7\frac{{12}^{2} }{2} )-0-0\\\\=49.248\\[/tex]

The answer choice which gives the best-example of the "random-sample" is (c) Ask 10 people from each "grade-level" at Allison's school about how many games they have on their phones.

A "Random-Sample" is a subset of a larger population which is chosen in such a way that each member of the population has an equal chance of being selected.

The Option (c) :  gives the best example of a random sample that Allison could use to help answer her question. By asking 10 people from each grade level at her school, Allison can obtain a sample that includes a variety of ages, genders, and backgrounds.

This can help to ensure that the sample is representative of the population she is interested in studying.

Option (a) : is not a random sample because it only includes teenagers who happen to be at the grocery store at the time Allison is conducting her survey. This may not represent entire population of teenagers at her school.

Option (b) : is not a random sample either because it only includes people who happen to be at the library on Saturday morning. This may not be representative of the entire population of teenagers at her school.

Option (d) :  is not a random sample because it only includes teenagers from 20 different countries. This may not be representative of the population of teenagers at Allison's school or in her local area.

Therefore, the correct option is (c).

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The effect of the transformation is a vertical srhink of scale factor 1/9.

For a function f(x), can define a vertical dilation of scale factor k as:

g(x) = k*f(x).

In this case the transformation is:

f(x) ---> (1/9)*f(x)

So we have a vertical dilation of scale factor k = 1/9, so we have a vertical contraction.

Then the effect that this will have in the graph is that it will contract/shrink it vertically.

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Answer:

The greatest area enclosed by the fence will be a square. If the farmer has 60 metres of perimeter fencing, he can use 15 meters of fencing for each side of the square. This would give him an area of 15² = 225 m². Since he can keep one chicken for every square meter, he can keep 225 chickens. Therefore, the farmer should arrange his fence in the shape of a square to get the greatest area.

Answer:

Beauty algebra is not a recognized term or concept within the field of mathematics. Therefore, there is no main idea associated with it in mathematical context. It is possible that the term is used in a different context or field, but without additional information, it is not possible to provide a more accurate answer.

The point in Figure 2 that corresponds to point L in Figure 1 is the midpoint of line segment NP.

When two figures are congruent, it means that they have the same shape and size. This implies that corresponding points in the two figures have the same position and distance from each other.

In Figure 1, the points I, J, L, K, N, P, and Q are labeled. To find the point in Figure 2 that corresponds to point L, we need to look for a point that has the same relative position and distance as point L in Figure 1.

From Figure 1, we can see that point L is the midpoint of the line segment JK. Therefore, to find the corresponding point in Figure 2, we need to look for a point that is the midpoint of the line segment that corresponds to JK. In Figure 2, the line segment that corresponds to JK is NP, and the midpoint of NP corresponds to the point that is equivalent to point L. Therefore, the point that corresponds to point L in Figure 2 is the midpoint of line segment NP.

It is important to note that identifying corresponding points in congruent figures is a fundamental concept in geometry and is often used to solve problems involving congruence and similarity.

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Answer:

A.

Step-by-step explanation:

A positive angle has the initial side at the positive x-axis and the terminal side rotated counterclockwise from it.

That is shown in diagram A.

Answer:

Okay, let's solve this step-by-step:

   The figure shows a rectangle partitioned into 6 smaller rectangles

   4 of these rectangles are shaded

   To find the probability a randomly chosen point lies in a shaded area, we calculate:

Probability = (Number of shaded squares) / (Total number of squares)

   There are 6 smaller rectangles

   4 of these are shaded

   So Number of shaded squares = 4

   And Total number of squares = 6

   Plugging this in:

   Probability = (4) / (6)

   = 2/3

   Converting to a percent:

   2/3 = 66.7%

   Rounded to the nearest tenth: 67%

So the final answer is:

The probability that a point chosen at random would lie in the shaded area of the figure is 67% (rounded to the nearest tenth of a percent).

Let me know if this helps explain the steps and solution. I can provide more details if needed.

Good luck!

Step-by-step explanation:

The country that had the greatest percentage of its students report being right-hand dominant with approximately 87% is UK

For Australia, 79 out of 120 students reported being right-hand dominant. So, the percentage of right-hand dominant students in Australia is:

(79/120) x 100 = 65.8%

For Canada, 68 out of 80 students reported being right-hand dominant. So, the percentage of right-hand dominant students in Canada is:

(68/80) x 100 = 85%

For the United Kingdom, 139 out of 160 students reported being right-hand dominant. So, the percentage of right-hand dominant students in the UK is

(139/160) x 100 = 86.9%

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The annual insurance premium for John Noel and his wife is $616, which corresponds to option (b).

The annual insurance premium can be calculated using the following formula:

Annual premium = (Amount of insurance coverage / $100) x Rate per $100 of insurance

The amount of insurance coverage is 80% of the replacement value of the home, which is $250,000, so it is:

Amount of insurance coverage = 0.8 x $250,000 = $200,000

The rate per $100 of insurance depends on the fire protection class of the home. According to industry standards, fire protection class 5 has a rate of $0.308 per $100 of insurance.

Therefore, the rate per $1 of insurance is:

Rate per $1 of insurance = $0.308 / 100 = $0.00308

The rate per $100 of insurance is:

Rate per $100 of insurance = $0.00308 x 100 = $0.308

Using the formula above, we can calculate the annual insurance premium:

Annual premium = ($200,000 / $100) x $0.308 = $616

Therefore, the annual insurance premium for John Noel and his wife is $616, which corresponds to option (b).

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Answer:

When n is greater than 1/2 or always true

n > 1/2

Step-by-step explanation:

Rewrite.

0+0+6(n−1)=2(n+1)

Simplify by adding zeros.

6(n−1)=2(n+1)

Apply the distributive property.

6n+6⋅−1=2(n+1)

Multiply 6 by −1.6n−6=2(n+1)

Simplify 2(n+1).

6n−6=2n+2

Move all terms containing n to the left side of the equation.

4n−6=2

Move all terms not containing n to the right side of the equation.

4n=8

Divide each term in 4n=8 by 4 and simplify.

n=2

The sinusoidal function that matches the specified graph, expressed using π ≈ 3.1416 is; y ≈ 4·sin(0.628·(x + 3))

A sinusoidal function is a periodic function that is based on either the sine or the cosine function.

The general form of a sinusoidal function is; y = A·cos(B·(x - C)) + D

The peak and the trough of the graph of the function indicates that the amplitude, A = (4 - (-4))/2 = 4

The vertical shift, D = (4 + (-4))/2 = 0

The period, P = 2·π/B

A cycle is completed in -0.5 - (-10.5) = 10 units of the x-value interval

P = 10 = 2·π/B

Therefore; B = π/5

When x = -8, y = 0, therefore;

0 = 4·sin((π/5)·((-8) - C)) + 0

4·sin((π/5)·((-8) - C)) = 0

sin((π/5)·((-8) - C)) = 0

(π/5)·((-8) - C) = 0

((-8) - C)  = 0

C = -8

When x = 2, y = 0, therefore;

0 = 4·sin((π/5)·(2 - C)) + 0

4·sin((π/5)·(2 - C)) = 0

sin((π/5)·(2 - C)) = 0

(π/5)·(2 - C) = 0

(2 - C)  = 0

C = 2

Similarly; When x = -3, y = 0, therefore; C = -3

y = 4·sin((π/5)·(x + 3))

The value C = -3, corresponds to the horizontal shift of the graph of the sine function, which is shifted 3 units to the left

The sinusoidal function, where π ≈ 3.1416 is therefore;

y ≈ 4·sin((0.628)·(x + 3))

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y = x + 2 represents the correct equation for the situation.

Option D is the correct answer.

We have,

The problem states that the number of miles the runner runs this week (y) will be 2 more than the number of miles she ran last week (x).

We can express this relationship using the equation:

y = x + 2

This equation means that if we know the number of miles the runner ran last week (x), we can find the number of miles she runs this week (y) by adding 2.

Thus,

y = x + 2 represents the correct equation for the situation.

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Answer:

The inverse tangent of 3/1 can be found using a scientific calculator or graphing calculator by taking the arctan(3/1), which gives the angle in radians. To convert to degrees, we can multiply by 180/π. Rounding to the nearest degree gives:

arctan(3/1) = 71.57° ≈ 72°

Therefore, the answer is option C: 72°.

The equation that models the relationship between the number of guests, x, and the total charge, y is A. y = 450 + 125x. The base charge for a single guest is $450, and for each additional guest, the charge increases by $125. So, we add 125 times the number of additional guests to the base charge of $450.

Answer: 4

Step-by-step explanation: because he needs to divided by 2

Answer:

Step-by-step explanation:

Add '-1.25' to each side of the equation.

1.25 + -1.25 + -0.5x = 0.75 + -1.25 + 3.5n

Combine like terms: 1.25 + -1.25 = 0.00

0.00 + -0.5x = 0.75 + -1.25 + 3.5n

-0.5x = 0.75 + -1.25 + 3.5n

Combine like terms: 0.75 + -1.25 = -0.5

-0.5x = -0.5 + 3.5n

Divide each side by '-0.5'.

x = 1 + -7n

Simplifying

x = 1 + -7n

Answer:

To determine the domain of f - g, we need to first find the expression for f - g.

f - g = (x^2 - 4) - (2x + 3)

f - g = x^2 - 2x - 7

The domain of f - g is the set of all real numbers for which the expression x^2 - 2x - 7 is defined.

We know that a quadratic expression of the form ax^2 + bx + c is defined for all real numbers x, so long as the expression under the square root in the quadratic formula (b^2 - 4ac) is non-negative.

In this case, a = 1, b = -2, and c = -7, so the expression under the square root is:

b^2 - 4ac = (-2)^2 - 4(1)(-7) = 4 + 28 = 32

Since 32 is positive, we know that the expression x^2 - 2x - 7 is defined for all real numbers x, and therefore the domain of f - g is all real numbers.

So the answer is not among the choices given.

Answer:

x = 12

Step-by-step explanation:

We are given that the dimensions of a rectangle are (x-1) and (x+7) meters, and we know that the area of the rectangle is 128 square meters.

We can set up an equation to solve for x as follows:

Area of rectangle = Length × Width

128 = (x-1)(x+7)

Expanding the right side, we get:

128 = x^2 + 6x - 7

Bringing all the terms to one side, we get:

x^2 + 6x - 135 = 0

Now we can use the quadratic formula to solve for x:

x = (-6 ± √(6^2 - 4(1)(-135))) / (2(1))

x = (-6 ± √936) / 2

x = (-6 ± 30) / 2

x = -3 ± 15

x = -18 or x = 12

Since x represents a length, it must be positive. Therefore, the value of x is 12.

The proof for the above is given as  follows:

∠A ≅ ∠C -  Given

BD ⊥ ∠ABC - Given
AC ⊥ BD - Angle Bisector Theorem

According to the angle bisector theorem, a triangle's opposing side is split into two segments that are proportionate to its other two sides. A ray that splits a given angle into two equal angles is known as an angle bisector.

Thus, it is correct to state that AC ⊥ BD according to the angle bisector theorem.

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The surface area of the cube of side x-4 in terms of x is 6x² - 48x + 96.

Given length of a side of a cube (a) = x-4

The formula for finding the surface area of a cube = 6a²

By, substituting the 'a' value in the above formula we can obtain the surface area of the cube.

6a² = 6 * (x-4)²                           [a = x-4]

      = 6 * (x² - 8x + 16)

      = 6x² - 48x + 96

From the above analysis, we can conclude that the surface area of the given cube in terms of 'x' is 6x² - 48x + 96.

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The method can be used to find the range of a set of data is Find the difference between the maximum and minimum values. Option A

The range of a given set of data can simply be defined as  the difference that exists between the lowest and highest values of the data.

This is done irrespective of the arrangement of data like in ascending or descending order.

The range of values can be misleading sometimes when there are extremely high or low values.

For a range of function, it is the mean value of all the outputs of that function.

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Answer:

So Alina can make a box with dimensions 8.445 inches by 8.445 inches by 8.445 inches (with a metal top) that will hold approximately 606.526 cubic inches.

Step-by-step explanation:

Let's assume that the length of one side of the square base of the box is "x". Then the height of the box is also "x" to maximize the volume.

The surface area of the box (excluding the top) is given by:

2(x^2) + 4(x^2) = 6(x^2)

The surface area of the metal top is:

x^2

The total surface area of the box is the sum of the surface area of the box and the surface area of the metal top:

6(x^2) + x^2 = 7(x^2)

The cost of the wood for the box is:

5 cents per square inch * 6(x^2) = 30x^2 cents

The cost of the metal for the top is:

12 cents per square inch * x^2 = 12x^2 cents

The total cost of the box is:

30x^2 + 12x^2 = 42x^2 cents

We want to find the maximum volume of the box that can be made with $30, which is 3000 cents. Therefore, we can set up the equation:

42x^2 = 3000

Solving for x, we get:

x^2 = 71.429

x ≈ 8.445

Therefore, the maximum volume of the box is:

V = x^2 * x = (8.445)^3 ≈ 606.526 cubic inches.

So Alina can make a box with dimensions 8.445 inches by 8.445 inches by 8.445 inches (with a metal top) that will hold approximately 606.526 cubic inches.

The monthly cell phone bill when shared data equals zero is given as follows:

$26.

The slope-intercept representation of a linear function is given by the equation presented as follows:

y = mx + b

The coefficients of the function and their meaning are described as follows:

The intercept of the line in this problem is given as follows:

b = 26.

Hence $26 is the monthly cell phone bill when shared data equals zero.

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Answer: 599.7 square miles

Step-by-step explanation: Divide 2,099,451 by 3501 and then round to the nearest tenth.

The steps for the construction are given below:

A new line can be created connecting the points where these two circles intersect using just a simple ruler.

Now that you have succeeded in this task, feel free to experiment and manipulate the astonishing construction you've completed using the same innovative tools.

While this is only an elementary blueprint, there are numerous advanced constructions that can be produced by taking advantage of both GeoGebra and traditional paper/pencil/ruler/compass techniques.

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The domain of the relation, given the points the coordinate plane has, is A.{−5, −3, 0, 2, 5}

The range of representable x-values in a function or relation when plotted on a coordinate plane are regarded as the domain. This values serve as inputs that can generate correspondig outputs within functions and relations. Displayed along the x-axis, domains strictly adhere to their input-based designation.

The x values from the graph are, - 5, - 3, 0, 2, 5 .

This means that the domain is {−5, −3, 0, 2, 5}.

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The sum of the geometric series is -12,276.

So, the correct answer is C. -12,276.

To find the sum of the geometric series, we can use the formula:

[tex]S = a \times (1 - r^n) / (1 - r),[/tex]

where S is the sum of the series,

a is the first term,

r is the common ratio, and

n is the number of terms.

In this case, the first term (a) is 6(2) = 12, the common ratio (r) is 2, and the number of terms (n) is 10.

Plugging these values into the formula, we get:

[tex]S = 12 \times (1 - 2^{10} ) / (1 - 2).[/tex]

Calculating further:

[tex]S = 12 \times (1 - 1024) / (-1) = 12 \times 1023 = 12276.[/tex]

Therefore, the sum of the geometric series is -12,276.

So, the correct answer is C. -12,276.

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A recursive sequence are -20, -80, -320 and  -1280.

To write a recursive sequence that represents the sequence defined by the given explicit formula, we need to find a rule that relates each term of the sequence to the previous term.

The explicit formula for the sequence is

[tex]a_{n}[/tex] = -5 [tex](4)^{n-1}[/tex]

To find the recursive formula, we need to express each term in terms of the previous term. Let's say the first term of the sequence is  [tex]a_{1[/tex].

[tex]a_{1[/tex]  = -5 * 1 = -5

[tex]a_{2}[/tex] = -5 * 4 = -20

[tex]a_{3}[/tex] = -5 * 16 = -80

...

[tex]a_{n}[/tex] = -5 [tex](4)^{n-1}[/tex]

We can see that each term in the sequence is 4 times the previous term, so we can express the nth term in terms of the (n-1)th term as follows

[tex]a_{1[/tex] = -5

[tex]a_{n}[/tex] =  4[tex]a_{n-1}[/tex] , for n > 1

This gives us the recursive formula for the sequence. To generate the sequence, we start with the initial term [tex]a_{1[/tex] =-5 and use the recursive formula to find the subsequent terms.

For example, if we want to find a5, we can use the recursive formula

[tex]a_{2}[/tex] = 4[tex]a_{1[/tex] = 4(-5) = -20

[tex]a_{3}[/tex] =  4[tex]a_{2}[/tex] = 4(-20) = -80

[tex]a_{4}[/tex] = 4[tex]a_{3}[/tex] = 4(-80) = -320

[tex]a_{5}[/tex] = 4[tex]a_{4}[/tex] = 4(-320) = -1280

Therefore, [tex]a_{5}[/tex] = -1280.

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a) 18 Kids own their own instruments.

b) 72 kids rent instruments.

c) 80%  percentage of the kids rent their instruments.

We have,

There are 90 kids in the band.

20% of the kids own their own instruments.

a. How many kids own their own instruments?

So, 20% of 90

= 20/100 x 90

= 1/5 x 90

= 18 kids

b. How many kids rent instruments?

= 90 - 18

= 72 Kids

c. . What percentage of the kids rent their instruments?

So, x% of 90 = 72

90x = 7200

x= 80%

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