What is a commutative property in math?.

Answer:

10z

Step-by-step explanation:

20z=2*2*5*z

30z=2*3*5*z

common ones are 2, 5, z

2*5*z=10z

Answer:12

Step-by-step explanation:

The mean of the sample is 10 and median is 10.5

The mean of the sample is given by: (∑ tour day)/ n

where n is number of visitors  

∑ tour day =12 + 7 +9 + 10 + 11 +11

=> 60

so ∑ tour day = 60

n = 6

so mean = 60 /6

=> 10

so the mean of the sample is 10.

The median of the list is found by sorting the element in ascending order and then find the average of middle most value

so after sorting the list in ascending order we get:

7 , 9, 10 , 11 , 11 , 12

so the median = (10 +11 )/2

=> 10.5

so the median of the list is 10.5

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Complete question:

The tourit bureau of the Hawaiian Iland urveyed a ample of United State tourit a they left to return home. The tourit were aked how many day they pent on their viit. Their repone were a follow.

12,7,9,10,11,11

Find the mean and median of this sample of numbers. Round your answer to two decimal places.

Answer:

Step-by-step explanation:

I think that the numbers 10-(2-3990

Answer:

(0,3)

Step-by-step explanation:

y = mx + b

[tex]y=\frac{1}{2}x+b[/tex]

[tex]4=\frac{1}{2}(2)+b[/tex]

4 = 1 + b

b = 3

[tex]y=\frac{1}{2}x+3[/tex]

'b' represents the y-intercept in slope-intercept form. Another point is (0,3)

Answer:

After that, the 3X + 1 problem has appeared in various forms. It is one of the most infamous unsolved puzzles in the word. Prizes have been offered for its solution for more than forty years, but no one has completely and successfully solved it [5].

Step-by-step explanation:

Angela check out 12 library book and Inola check out 1/3v then Inola checked out 12 - 3 = 9 books.

What is algebra ?

Algebra is a branch of mathematics that deals with mathematical symbols and the rules for manipulating these symbols. It is a way to represent mathematical relations and to reason about them. Algebraic concepts include using variables (such as x or y) to represent unknown values, using operations such as addition, subtraction, multiplication and division.

We know that ,

Angela = 12 books

Inola = 1/3v less than Angela

To find the value of v, we can set up the proportion ,

12 = v + 1/3v

We can then solve for v by multiplying both sides by 3 ,

12*3 = 3v + v

36 = 4v

So, v = 9

Inola checked out 1/3v less than Angela, which is ,

1/3 * 9 = 3

So, Angela check out 12 library book and Inola check out 1/3v then Inola checked out 12 - 3 = 9 books.

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It would take approximately 12.6 years for the value of the car to be $700.

To find out how long it would take for the value of the car to be $700, we can use the formula for exponential decay. The value of the car after t years is:

[tex]V(t) = V_0 \times (1/2)^{(t/k)}[/tex]

Where V₀ is the initial value of the car, t is the time in years, k is the time constant in years, and (1/2) is the decay constant.

Given:

V₀ = $13,000

V(t) = $700

k = 3

Now you can solve for t:

[tex]700 = 13,000 \times (1/2)^{(t/3)}[/tex]

Take the natural logarithm of both sides:

[tex]ln(700) = ln(13,000 \times (1/2))^{(t/3))}[/tex]

[tex]ln(700) = ln(13,000) + ln((1/2)^{(t/3)})[/tex]

ln(700) = ln(13,000) + (t/3) × ln(1/2)

t = 3 × (ln(700) - ln(13,000))/ln(1/2)

t = 12.6 years (rounded to the nearest tenth of a year)

Thus, it would take approximately 12.6 years.

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The question seems to be incomplete the correct question would be:

A new car is purchased for $13,000 and over time its value depreciates by one-half every 3 years. How long, to the nearest tenth of a year, would it take for the value of the car to be $700?​

The number of possible ways in which Juan can pick exactly one purple counter from Box A and Box B is 3.

Given,

      We know that,   Box A contains only green and purple counters.

       We also know that,   Box B contains only green, purple, and orange counters.

According to question ,

Juan picked one counter from Box A and one counter from Box B

Possible ways to pick exactly one purple counter :

Box A                                       Box B

one purple counter       one orange counter

one purple counter       one green counter

one green counter        one purple counter

Hence, there are 3 ways in which Juan can pick exactly one purple counter.

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Answer:

[tex] \sf \: g = 12[/tex]

Step-by-step explanation:

Given equation,

→ 156 = 13g

Now the value of g will be,

→ 156 = 13g

→ 13g = 156

→ g = 156 ÷ 13

→ [ g = 12 ]

Hence, the value of g is 12.

If a quadratic equation's discriminant is equal to zero, then its roots are all identical..The format for quadratic equations is as follows: axe? + bx + c=0, where a 0.

If a quadratic equation's discriminant is equal to zero, then its roots are all identical. The format for quadratic equations is as follows: axe? + bx + c=0, where a 0.The coefficients a, b, and c are used to calculate the discriminant of such equations.

D will act as the discriminator. D= b – 4ac first, let's figure out what our equation's coefficients a, b, and c are.When the discriminant (D) of the equation equals zero, the equation 3x2 + Kx-30 has equal roots. The quadratic equation discriminant is provided by the equation D = b2 - 4ac, where a = 3, b = K, and c = -30. We obtain the following formula by substituting these values: D= K2 - 4(3) (-30)

D=K2 + 360 K2 = -360, and K=V - 360) = 6V as a result (-5)

D =0

k- 128 = 0

→ k= 128

k=tv128

k=t V64 x 2

k=t8v2

|S-{-8V2, 8V2}

Complete question:

What is the value of k for which the quadratic equation 3x2 KX 3 0 has equal roots?. And also Find the value of k if the quadratic equation 4x2 - kx + 8 = 0 has equal roots

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The value of k for which the quadratic equation 3x² + kx + 3 = 0 has equal roots is -3.

The condition for a quadratic equation to have equal roots is that its discriminant, which is given by the expression b² - 4ac, must be equal to 0. In this case, a = 3, b = k, and c = 3. Substituting these values into the expression for the discriminant gives us:

k² - 4 * 3 * 3 = 0.

Solving for k gives us

k = ±√(4 * 3 * 3) = ±6.

Since the coefficient of x in the equation is positive, both roots are real and equal only if k = -6. Hence, the value of k for which the equation 3x² + kx + 3 = 0 has equal roots is -3.

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Complete Question:

What is the value of k for which the quadratic equation 3x² + kx + 3 = 0 has equal roots?

The average rate of change of an function g(x) = 4ˣ  from x₁ = -1 to x₂ = 3 is 15.9375

The average rate of change of an function can be determine by using the formula below:

average rate of change = (g(x₂)- g(x₁)) / [x₂- x₁]

From the given information, g(x) = 4ˣ and x₁ = -1, x₂ = 3

For g(x) = 4ˣ:

average rate of change =  (4³ -  4⁻¹) / (3-(-1))

                                      = (63.75)/4

                                     = 15.9375

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The Cartesian product of A = {1, 2} and B = {a, b} is A × B = {(1, a), (1, b), (2, a), (2, b)}

We know that the Cartesian Product of sets M and N is defined as the set of all ordered pairs (x, y) such that x belongs to set M and y belongs to set N.

It is denoted as M × N = {(x,y) | x ∈ M and y ∈ N}

For example, consider a set P = {1, 2}

and set M = {3, 4, 5},

From the definition of the Cartesian Product of P and M,

P × M = {(1, 3), (1, 4), (1, 5), (2, 3), (2, 4), (2, 5)}

In this question we have been given two sets A = {1, 2} and set B = {a, b}

Using the definition of Cartesian product,

A × B = {(1, a), (1, b), (2, a), (2, b)}

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The number of push-ups did sara did during gym class if for every 7 push-ups Dulce can do, Sara can do 6 is 24 push ups.

Number of push ups Dulce can do : number of push ups Sara can do

Let

number of push ups Sara does = x

7 : 6 = 28 : x

7/6 = 28/x

cross product

7 × x = 28 × 6

7x = 168

divide both sides by 7

x = 168/7

x = 24

Therefore, Sara does 24 push ups during the gym class.

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Answer:

-6x² + 35x - 36.

Step-by-step explanation:

(-2x + 9) (3x - 4)

=-2x ( 3x - 4) + 9 (3x - 4)

=-6ײ + 8x + 27x - 36.

=-6x² + 35x - 36.

The 99th percentile for the mean height of a random sample of 20 adult women is approximately 68.7 inches, which is 3.7 inches above the mean of 65 inches.

The 99th percentile for the mean height of a random sample of 20 adult women can be calculated using the normal distribution. The normal distribution is a bell-shaped curve that describes the probability of a given event occurring. In this case, the mean and standard deviation of the height of adult women is used to calculate the probability of the mean height of a sample of 20 adult women being a certain value. For the 99th percentile, this means that the probability of the mean of the sample of 20 adult women being equal to or less than the value of 68.7 inches is 99%. This value is 3.7 inches above the mean of 65 inches, which is the expected mean height of adult women.

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The scale used for measuring the intensity of the earthquake is Richter Scale.

American seismologists Charles F. Richter and Beno Gutenberg developed the Richter scale (ML), a numerical indicator of an earthquake's size, in 1935. The height of the greatest seismic wave, as measured by the logarithm of its amplitude (height), is used to calculate the earthquake's magnitude.

Although the original Richter scale has been supplanted by other, more precise scales in modern science, the Richter scale is still frequently used incorrectly in news reporting of earthquake severity as a catch-all name for the logarithmic scale that earthquakes are measured on.

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The solution to the system of inequalities y ≤ 2x + 2 and y < -2x - 3 can be represented by a graph. The inequality y ≤ 2x + 2 represents a line with a slope of 2 and y-intercept of 2. The inequality y < -2x - 3 represents a line with a slope of -2 and y-intercept of -3. ( The graph attached)

The inequality y ≤ 2x + 2 represents a line in the form y = mx + b, where m is the slope and b is the y-intercept. In this case, the slope is 2 and the y-intercept is 2. To graph this inequality, we can first plot the line by using the y-intercept, which is the point (0,2) on the graph. Then, we can use the slope to find additional points that fall on the line, such as (1,4) or (-1,0). Once we have plotted several points, we can connect them to form the line.

The inequality y < -2x - 3 represents a similar line, but with a different slope and y-intercept. In this case, the slope is -2 and the y-intercept is -3. To graph this inequality, we can use the same process as before by first plotting the y-intercept (0,-3), and then using the slope to find additional points that fall on the line.

The solution to the system of inequalities is the area that lies on one side of the first line and the opposite side of the second line, which is the area between the two lines. This area can be represented by shading the region below the first line and above the second line on the graph. It is important to note that the solution region is not including the lines themselves, because the inequalities are strict inequalities.

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The factors of 9x² – 3x – 20 is (3x+4)(3x−5).

A number or other mathematical object is factorized or factored when it is written as the product of numerous factors, usually smaller or simpler things of the same kind.

Factorization in mathematics is the method of dividing a large number into tiny ones that, when multiplied together, give you the original number. Factorization is the split of a number into its factors or divisors.

We can also format it as

9x²−3x−20=9x²−15x+12x−20

by avoiding the everyday language

9x²−3x−20=3x(3x−5)+4(3x−5)

hence, we do

9x²−3x−20=(3x+4)(3x−5)

Factorization, also known as factoring, is the process of dividing or decomposing a thing into factors that, when multiplied together, form the original number, matrix, etc.

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The subtraction is not commutative because the order in which we subtract numbers affects the result.

Commutative property is applicable only for addition and multiplication processes. Thus, it means we can change the position or swap the numbers when adding or multiplying any two numbers.

The commutative property of subtraction does not apply to all real numbers. Subtraction is not commutative because the order in which we subtract numbers affects the result. For example, if we subtract 3 from 5, we get 2. But if we subtract 5 from 3, we get -2. The commutative property only applies to addition because a + b = b + a for all real numbers.

hence, the subtraction is not commutative because the order in which we subtract numbers affects the result.

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m<1=64

m<2=150

The equation is m+64=150

m= 86

Answer:

69.44

Step-by-step explanation:

now is 100%

100%=1

12%=0.12

1.12*62=69.44

Answer:

D = 6

Step-by-step explanation:

We can find D by:

[tex]D^{2*\frac{1}{2}} = 36^{\frac{1}{2}}[/tex]

We can multiply the square root of 1/2 to cancel out the 2 and put 36 into square root form, giving us:

D = [tex]\sqrt[2]{36}[/tex]

= 6

The vertical portion of this plane's path is 81 degrees because it is travelling at a 90-degree angle of depression. She will have 393.3 yards remaining after multiplying 450 by 45 by 126.

The vertical component of this plane's angle of descent is 81 degrees, or 90 degrees. The landing field is no longer in this location. This is the landing area. I have 450 points and a 126-degree angle. Since this is not a right triangle, I will apply the law of sins.

I'm going to perform my x over my sin of 45, which is equivalent to my 450 yards over the 126 point. I'll multiply 126 times by 45 times to get 450 times. Divide both sides by 126 degrees; we'll do that. She will have 393.3 yards remaining after multiplying 450 by 45 by 126.

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The median mass is given as follows:

40 g.

The median of a data-set is the middle value of a data-set, the value of which 50% of the measures are less than and 50% of the measures are greater than.

The dot plot shows the number of times that each measure appears in the data-set, hence the data-set is given as follows:

35, 35, 38, 38, 39, 39, 41, 42, 43, 43, 44, 45.

The data-set is composed by 12 elements, which is an even cardinality, hence the median is the mean of the two middle elements, the 6th and the 7th elements, thus:

Median = (39 + 41)/2 = 40.

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Answer:

6x²-22x+

Step-by-step explanation:

perimeter=2(L+W)

L=3x²-12x

W=2+x

perimeter=2(3x²-12x+2+x)

=2(3x²-11x+2)

6x²-22x+4=0

There is no solution for the given equation "-15y + 7 + 17y = 2y + 70".

We are given an equation.

"-15y + 7 + 17y = 2y + 70"

We have to calculate the number of solutions to the given equation.

"-15y + 7 + 17y = 2y + 70"

Rearrange the terms

-15y + 17y + 7 = 2y + 70

Combine like terms

2y + 7 = 2y + 70

Subtraction property of equality

2y - 2y = 70 - 7

Combine like terms

0 = 61

But it is not possible.

Thus, there is no solution for the given equation -15y + 7 + 17y = 2y + 70.

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The formula using the pronumerasl we get

For 'e' the formula stands as 2f = g+1

For 'f' the formula stands as c = 3s + 1

For 'g' the formula stands as a = 4d-3

For 'h' the formula stands as g = 5g-4

For 'i' the formula stands as e = 11f- 20

For 'j' the formula stands as q = 20p + 4

For 'k' the formula stands as t = 4b

For 'l' the formula stands as p = 3u - 1

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides. We have LHS = RHS (left hand side = right hand side) in every mathematical equation. To determine the value of an unknown variable that represents an unknown quantity, equations can be solved. The statement is not an equation if there is no "equal to" sign in it.

One of the significant forms used to express a straight line algebraically is the two point form. Each point on the line fulfills the equation for the line, which means that the equation for the line represents every single point on the line. When two points on a line, (x 1, y 1) and (x 2, y 2), are known, the two-point form of a line is used to get the equation of the line.

For 'e' the formula stands as 2f = g+1

For 'f' the formula stands as c = 3s + 1

For 'g' the formula stands as a = 4d-3

For 'h' the formula stands as g = 5g-4

For 'i' the formula stands as e = 11f- 20

For 'j' the formula stands as q = 20p + 4

For 'k' the formula stands as t = 4b

For 'l' the formula stands as p = 3u - 1

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The selling price of the TV is 300 euro (250 euro original price + 20% VAT).

What is VAT(Value Added Tax) ?

VAT stands for Value Added Tax, it is a consumption tax that is added to the price of goods and services. VAT is imposed on most goods and services in many countries around the world, and it is usually a percentage of the sale price. The percentage can vary depending on the country and the type of goods or services being sold.

To calculate the VAT, we can use the formula:

VAT = (original price x VAT percentage) / 100

So, in this case:

VAT = (250 x 20) / 100 = 50

Now we add the VAT to the original price to find the selling price:

selling price = original price + VAT

250 + 50 = 300 euro.

Therefore , The selling price of the TV is 300 euro (250 euro original price + 20% VAT).

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VAT = (original price x VAT percentage) / 100

So, in this case:

VAT = (250 x 20) / 100 = 50

Now we add the VAT to the original price to find the selling price:

selling price = original price + VAT

250 + 50 = 300 euro.

Therefore , The selling price of the TV is 300 euro (250 euro original price + 20% VAT).

Answer: 32

Step-by-step explanation: