The perimeter of the rectangle below is 128 units. Find the length of side CD. Write your answer without variables. 3x + 3 C 4x - 2 B CD =​

To find the proportionality of a table, you need to determine if the relationship between two variables in the table is proportional or not.

Calculating the ratio between each pair of data in a table allows you to determine whether a proportional relationship is there. The table depicts a proportionate relationship if all of those ratios are the same.

This can be done by dividing one variable by the other and checking if the ratio is equal for all data points in the table. If the ratio is constant, then the variables are proportional and the table is considered proportional.

Given that the question is incomplete and does not show the proportionality table, it is worth it to show how to find the proportionality of a table which would help solve the solution and gain knowledge.

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The question translated in English is:

Complete the following proportionality tables

The linear function giving U.S. land-line phone households(in millions in year) is f(t) = 35 - 2t

The number of U.S. households with land-line phones stood at 35 million at the beginning of 2014 and was projected to decline at the rate of 2 million households per year for the next 8 years.

let t = 0 corresponds to the beginning of 2004.

so the linear function formed by this information.

f(t) = 35 - 2t

where t is number of years since 2014 and f(t) will be the number of land-line phone households (in millions in years) in that particular year.

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Answer:

5(2x-3)-7x=x-10

or, 10x -15 -7x = x-10

or, 3x-15=x-10

or, 3x- x = 15-10

or, 2x = 5

or, x= 5/2

Answer:

To compare Bob and Alan's points per game, we can use the following summary statistics:

Mean: This is the average of the data set. It can be calculated by adding up all the values and dividing by the number of values.

Median: This is the middle value of the data set when it is arranged in order.

Range: This is the difference between the largest and smallest value in the data set.

Interquartile range (IQR): This is the range of the middle 50% of the data set, calculated as the difference between the 75th and 25th percentiles.

Mean absolute deviation (MAD): This is the average of the absolute differences between each value and the mean.

To compare the center of each player's data, the best measure of central tendency would be the mean. This is because it takes into account all the values in the data set and gives an overall average. The median can also be used, but it only considers the middle value and may not accurately represent the center if there are outliers in the data set.

To compare the spread of each player's data, the best measure of spread would be the range or IQR. This is because they give an idea of the range of values in the data set and how spread out the data is. The MAD can also be used, but it is a more complex calculation and may not provide as clear of an understanding of the spread of the data.

Based on the representations, summary statistics, and interpretations, it is not possible to determine if either friend is a basketball star without more context. A basketball star could have a high average points per game, a narrow range, and a small spread, but this would depend on the level of competition and the type of game being played. A player who consistently scores a high number of points and performs well under pressure could be considered a basketball star, but this cannot be determined solely based on the data presented.

Step-by-step explanation:

If you have a vector that starts at (a,b) and goes to (c,d), then the vector is <c-a, d-b>.

Here, that gives <-9,-12>, meaning the vector should point down to the left.

Additionally, anytime you have a vector <x,y>, you can write it as xi + yj, where i and j are unit vectors, <1,0> and <0,1> respectively.

Here that would be -9i-12j.

The magnitude of a vector <a,b> is equal to \sqrt{a^2+b^2}.

Here that would give you a length of 15.

As for the angle, if you drew a circle centered at the origin, we call 0 degrees the right side, on the x-axis.

You can shift a vector around on a plane and as long as it is parallel to and has the same magnitude as the original, it is the same. So let's put the tail of the vector at (0,0), so that the vector goes from (0,0) to (-9,-12). Now, form a triangle with those two points and the y-axis at (-9,0).

Now, the sin of the angle next to the origin is equal to 12/15, so the angle is arcsin(12/15) which is about 0.9273 radians, or 53.13 degrees. Let's use degrees.

Now, where is this angle? This angle is underneath the x-axis on the left side of the origin. Going from the x-axis on the right side, over the top, to the x-axis on the left side, is 180 degrees. We add 53.13, and get 233.13 degrees. Note that we did this counterclockwise, which you should probably note in your explanation. It is also 180-53.13 = 126.87 degrees clockwise.

In order to find a unit vector (a vector with magnitude 1) in the same direction as the original, just divide by the magnitude, giving us <-9/15, -12/15> or <-3/5, -4/5>. You can verify that the magnitude is equal to 1.

The required value of the cos(θ) for the interval 0 < θ < π/2 is given as 0.857.

These are the equation that contains trigonometric operators such as sin, cos.. etc.. In algebraic operations.

The value of cos(θ) can be found using the Pythagorean identity:

cos²(θ) + sin²(θ) = 1

Substituting the given value of sin(θ) = 0.515, we have:

cos²(θ) + 0.515² = 1

cos²(θ) = 1 - 0.515²

cos(θ) = √(1 - 0.515²)
        = √(1 - 0.265)
        = √(0.735) ≈ 0.857

So, cos(θ) = 0.857.

Thus, the required value of the cos(θ) for the interval 0 < θ < π/2 is given as 0.857.

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The division problem that the area model represents is; 0 remainder 32

We are given that the accurate division;

3600/45 = 80

We are also given that the accurate division as;

315/45 = 7

Now, we want to find 32/45 which would lead to a remainder. Thus, we have;

45 cannot go into 32 at all and as such, we will have the result as 0 remainder 32

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Answer:

-5z - 10

Step-by-step explanation:

Subtract 9z from 4z.

Answer:

[tex]0 < \text{x} \le 4[/tex]

If x is an integer, then x is any value in the set {1,2,3,4}

======================================================

Work Shown:

x = length of each side

6x = perimeter of the regular hexagon

The perimeter must be greater than 0.

Also, the perimeter must be less than or equal to 24. This is because of the phrasing "perimeter is at most 24 inches".

In other words, the perimeter is between 0 and 24, excluding 0 and including 24.

[tex]0 < \text{ perimeter } \le 24\\\\0 < 6\text{x} \le 24\\\\0/6 < 6\text{x}/6 \le 24/6\\\\0 < \text{x} \le 4\\\\[/tex]

If x is an integer, then x can be any value in the set {1,2,3,4}

Examples:

The gross pay is $496.68.

To calculate the gross pay, you need to calculate the total pay for the regular hours worked and the overtime hours worked separately, and then add them together.

Total pay for regular hours: 51 hours x $7.35/hour = $375.35

Overtime hours worked: 11 hours

Overtime rate of pay: 1.5 times the regular rate of pay, or $7.35 x 1.5 = $11.03

Total pay for overtime hours: 11 hours x $11.03/hour = $121.33

Gross pay: $375.35 + $121.33 = $496.68

So the gross pay is $496.68.

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The area of the square with side measuring 10 cm and 10 cm is 100 cm²

An equation is an expression that uses mathematical operations to show the relationship between numbers and variables. Types of equations are linear, quadratic, cubic and so on.

The area of a figure is the amount of space that is occupied by the two dimensional shape. The area of a square is the product of its length . It is given by:

Area = length * length

Let us assume that each side of the square is 10 cm, hence:

Area = 10 cm * 10 cm = 100 cm²

The area of the square is 100 cm²

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Step-by-step explanation:

A,No, there isn't a more efficient way to solve this system.

B.Yes, a more efficient way is to multiply the first equation by 4, add to eliminate y, then solve for x.

C.Yes, a more efficient way is to multiply the first equation by −4, add to eliminate y, then solve for x.

D.Yes, a more efficient way is to multiply the first equation by −4, add to eliminate x, then solve for y.

false :) thats ur answer

The volume of the sphere of radius 7 feet is given as follows:

1372 ft³.

The volume of the cube of sides 12 ft is given as follows:

1728 ft³.

The volume of a sphere of radius r is given by the multiplication of 4 by pi = 3 by the cubed radius, and the multiplication is then divided by 3, hence:

V = 4 x 3 x 7³/3

V = 1372 ft³.

The volume of a cube of side length s is given by the side length cubed, hence:

V = 12³

V = 1728 ft³.

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If x > y and a > b, the option that must be true is D. x + a > y + b.

Inequalities are simply created through the connection of two expressions. In this case, it should be noted that the expressions in an inequality are not always equal. Inequalities implies that the expressions are not equal. Here, they are denoted by the symbols ≥ < > ≤.

If two inequalities have inequality symbols facing the same direction, we can add the inequalities

For example: 4 < 7 and 1 < 10

So, we can add them to get: 4 + 1 < 7 + 10

Since x > y and a > b have inequality symbols facing the same direction, we can add the inequalities to get: x + a > y + b

The correct option is D.

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If x > y and a > b, which of the following must be true?

A. x > a

B. y > b

C. x + b > y + a

D. x + a > y + b

E. a + b > x + y

Amount of pretzel each person receives is 17/16 lb.

Fractions are numbers which are of the form a/b where a and b are real numbers. This implies that a parts of a number b.

Here, a is called the numerator and b is called the denominator.

Total weight of the bag of pretzels = 34 ounce

Elisa shares this among her two sisters equally.

Share of pretzels each sister gets = 34 / 2 = 17 ounces

We need this amount in pounds.

We know that,

16 ounce = 1 lb.

17 ounces = 17/16 lb.

Hence the amount of pretzels each get is  17/16 lb.

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The probability that Fred (a black phone) and Carrie (a white phone) are chosen next to each other is 10.2%.

The total number of cell phones in the store is 20 + 30 = 50.

The number of ways to choose 10 cell phones out of 50 is 50 choose 10, which can be calculated as:

C(50,10) = 50! / (10! * (50-10)!) = 50! / (10! * 40!)

= 19600600 / (3628800 * 8!)

= 19600600 / 3628800

= 545675

The number of ways to choose 9 black phones and 1 white phone is 20 choose 9 * 30 choose 1, which can be calculated as:

C(20,9) * C(30,1)

= 20! / (9! * (20-9)!) * 30! / (1! * (30-1)!)

= 20! / (9! * 11!) * 30! / (29!)

= 184756 * 30

= 554268

The probability of choosing 9 black phones and 1 white phone out of 10 phones is

554268 / 545675

= 0.102, or 10.2%.

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The complete questions may be:

there are 20 black cell phones and 30 white cell phones in a store. an employee takes 10 phones at random. find the probability of choosing 9 black phones and 1 white phone out of 10 phones.

Answer:

The notation for the point estimate is x = 304.

Therefore , the solution of the given problem of equation comes out to be value of g is 12 .

In a math equation, the comparable symbol (=) is used to denote equality between two propositions. It is demonstrated that by using mathematical formulas, which have been expressions of reality, different numerical factors can be compared. The equal sign, for instance, splits the integer 12 or the equation y + 6 = 12 to 2 different halves. It is possible to determine how many characters each side of such a symbol has. It's common for symbols to have conflicting meanings.

Here,

Given :

=> g -3 = 9

To find the value of g :

=> g = 9 + 3

=> g = 12

Thus , value of g is 12.

Therefore , the solution of the given problem of equation comes out to be value of g is 12 .

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The plane is 361.99 miles from its starting point on a bearing of 147.72 degrees from due north.

To calculate the distance travelled by plane, we can use the formula:

distance = speed x time

First, let's calculate the distance travelled from point A to B:

distance = 110 mph x 1.6 hours = 176 miles

Next, let's calculate the distance travelled from point B to C:

distance = 110 mph x 2.9 hours = 319 miles

To calculate the total distance from the starting point, we need to find the hypotenuse of the triangle formed by points A, B, and C. To do this, we need to utilise the Pythagorean theorem:

c² = a² + b²

Where c is the distance between the two points and a and b are the distances travelled in each direction. In this case, a is the distance from A to B (176 miles), and b is the distance from B to C (319 miles).

c² = 176² + 319²

c = √(176² + 319²)

c = √(31,521 + 100,761)

c = √(132,282)

c = 361.99 miles (rounded to three decimal places)

So, the plane is 361.99 miles from its starting point.

To find the bearing of the plane from its original location, we need to use the arctangent formula:

θ = arctan(b/a)

Where θ is the bearing, and a and b are the distances travelled in each direction. In this case, a is the distance from A to B (176 miles) and b is the distance from B to C (319 miles).

θ = arctan(319/176)

θ = 57.72 degrees (rounded to three decimal places)

This means the plane is 57.72 degrees from due north. To find the actual bearing from due north, we need to add 90 degrees since the plane is travelling in the northeasterly direction:

Bearing = 90 + 57.72 = 147.72 degrees (rounded to three decimal places)

In conclusion, the plane is 361.99 miles from its starting point on a bearing of 147.72 degrees from due north.

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The value for x is 30 cm.

equivalent triangles

According to  the following equation is valid:

x/75 = 12/30

30x = 900 is obtained by dividing by 12 * 75.

Divide both sides of 30x/30 to get 900/30x = 30.

As a result, the value of x is 30 cm.

Two rectangles are said to be comparable if the ratio of one triangle's two sides to the two sides of that other triangle is the same, and the angles that the two sides of both triangles inscribe are equal. This means that if A = X and Acceptor = AC/XZ, then ABC XYZ.

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I understand the question looking for is :

What is the value of x?

X= 4.8 cm

X= 30 cm

X= 93 cm

X= 187.5 cm

The value for x is 30 cm.

equivalent triangles

x/75 = 12/30

30x = 900 is obtained by dividing by 12 * 75.Divide both sides of 30x/30 to get 900/30x = 30.

As a result, the value of x is 30 cm.

What are some similar triangles?

Two rectangles are said to be comparable if the ratio of one triangle's two sides to the two sides of that other triangle is the same, and the angles that the two sides of both triangles inscribe are equal. This means that if A = X and Acceptor = AC/XZ, then ABC XYZ.

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I understand the question looking for is :

What is the value of x?

X= 4.8 cm

X= 30 cm

X= 93 cm

X= 187.5 cm

Answer:

$66.43

Step-by-step explanation:

In order to see how much one sweater cost you need to divide 47.45 by 5 and you will get 9.49 then after that you will multiply 9.49 by 7 and get 66.43

[tex]\begin{array}{ccll} sweaters&\$\\ \cline{1-2} 5 & 47.45\\ 7& x \end{array} \implies \cfrac{5}{7}~~=~~\cfrac{47.45}{x} \\\\\\ 5x=7(47.45)\implies x=\cfrac{7(47.45)}{5}\implies x=66.43[/tex]

Answer:

REGULAR

Step-by-step explanation:

Number of employees that are in favor of stocking healthier snacks in the break room are 192.

Ratio is described as the comparison of two quantities to determine how many times one obtains the other. The proportion can be expressed as a fraction or as a sign: between two integers.

Given;

4/5 ​start fraction of the survey respondents are in favor of stocking healthier snacks in the break room

The employees surveyed are representative of all 240 employees

Now, the number of employees in favor;

=4/5 * 240

=4*48

=192

Therefore, the answer according to the given ratio will be 192.

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Answer:

Step-by-step explanation:

You want a drawing of the vector between (1, 3) and (-8, -9), along with its component form as sum of unit vectors i and j, its magnitude and direction, and the corresponding unit vector.

See the attachment for the drawing.

The difference between the head and tail coordinates is ...

  (-8, -9) -(1, 3) = (-9, -12)

That is, the vector extends -9 units in the +x direction, and -12 units in the +y direction, so its component form is ...

  -9i -12j

The magnitude of a vector is the root of the sum of squares of its components:

  |v| = √((-9)² +(-12)²) = √(81+144) = √225

  |v| = 15

The direction can be found using the arctangent function:

  ∠v = arctan(-12/-9) = 180° +51.13° . . . . . accounting for quadrant

  ∠v =  = 233.13°

The unit vector in the same direction is found by replacing the magnitude in polar form by 1.

  u = 1∠233.13°

The component form is found by dividing the vector by its magnitude:

  u = v/|v| = (-9i -12j)/15

  u = -0.6i -0.8j

__

Additional comment

The attached calculator output shows the polar form angle as negative. That is another way the direction can be expressed. The positive angle value is found by adding 360° to that negative value.

The size class interval recommend is 30.

Assume that the observations are more or less evenly distributed across the range, and you should get about 5 observations per class.

It also presumes that your interest in the observations is uniform: you are equally interested in values close to 60 as you are in values close to 480. If you were only interested in values above 450, you could group all values from 56 to 449 into one large class and divide the rest into smaller classes.

It is also necessary to check to see if the distribution is uniform. If it is skewed in either direction, it makes more sense to have smaller classes where the observations are dense and larger classes where they are sparse.

Therefore, the size class interval recommend is 30.

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Answer:

C) 2.76

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

Given:

We know that inscribed angle is half the arc measure. Set up equation and solve for x:

Answer:

196.1 cm^2

Step-by-step explanation:

The area of a circle is given by Area = πr^2

R is (15.8 cm)/2 = 7.9 cm

Area = (3.14)*(7.0cm)^2

Area = 196.1 cm^2

Answer:

The formula to calculate the area of a circle is given by: A = π * r^2, where r is the radius of the circle.

Given the diameter of 15.8 cm, we can calculate the radius by dividing the diameter by 2: r = 15.8 cm / 2 = 7.9 cm

Plugging the value of the radius into the formula: A = π * 7.9^2 = 3.14 * 62.41 = 196.0794 cm^2

Rounding the answer to the nearest hundredth, the area of the circle with a diameter of 15.8 cm is approximately 196.08 cm^2.

The initial value of the car will be $27500 and the value after 12 years will be $3393.78.

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that the dollar value v (t) of a certain car model that is t years old is given by the following exponential function [tex]v(t) = 27,500(0.84)^t[/tex].

The initial value will be at t= 0,

[tex]v(t) = 27,500(0.84)^t[/tex]

v(t) = 27500 x (0.84)⁰

v(t) = $27500

The value of the car after 12 years will be:-

[tex]v(t) = 27,500(0.84)^t[/tex]

v(t) = 27500(0.84)¹²

v(t) = $3393.78

Therefore, the car will have a $27500 initial value and a $3393.78 value after 12 years.

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Answer:

1 year

Step-by-step explanation:

the equation to find simple interest

A = P (1 + rt)

so plug in yore numbers

400=300(1+0.4*t)

400=300+120t

120=120t

1=t