Factor this polynomial completely.
x^2-8x+12

Answers

Answer 1

Answer:

(x - 2) (x - 6)

Step-by-step explanation:

Factor the following:

x^2 - 8 x + 12

The factors of 12 that sum to -8 are -2 and -6. So, x^2 - 8 x + 12 = (x - 2) (x - 6):

Answer:  (x - 2) (x - 6)

Answer 2

The factors of the given polynomial are (x-6) and (x-2).

The given polynomial is x²-8x+12.

The factors are the polynomials which are multiplied to produce the original polynomial.

By splitting middle term method, we get

x²-6x-2x+12

x(x-6)-2(x-6)

(x-6)(x-2)

Therefore, the factors of the given polynomial are (x-6) and (x-2).

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Related Questions

What is another name for a relation that has each element in its domain
paired with exactly one element in its range?

Answers

Answer:

Step-by-step explanation:

A function is a relation in which each element of the  domain is paired with exactly one element of the  range.

A relation is a set of ordered pairs. The set of the first components of each ordered pair is called the domain and the set of the second components of each ordered pair is called the range. Consider the following set of ordered pairs. The first numbers in each pair are the first five natural numbers. The second number in each pair is twice that of the first.

{(1,2),(2,4),(3,6),(4,8),(5,10)}

The domain is{1,2,3,4,5} and the range is{2,4,6,8,10}

So, this relation is a function.

Given ΔJKL : ΔXYZ, find x.
A)10
B)12
C)16
D)20

Answers

Answer: 12

Step-by-step explanation:

Triangle JKL is dilated by a scale factor of 1.5 to get triangle XYZ. You can find this out by dividing 9 by 6, which will give you 1.5. To get the answer, you multiply 8 by 1.5 to get 12

ANSWER

EXPLANATION

We have that ΔJKL is similar to ΔXYZ.

The corresponding sides will therefore

be in the same proportion.

This implies that,

[tex] \frac{XY}{JK} = \frac{YZ}{KL} [/tex]

From the diagram,XY=9, JK=6, KL=8, and YZ=x.

We plug in the known values into the formula to get:

[tex] \frac{9}{6} = \frac{x}{8} [/tex]

Multiply both sides by 8

[tex] \frac{9}{6} \times 8=\frac{x}{8} \times 8[/tex]

[tex]12 = x[/tex]

The correct answer is B.

Which expression is equivalent to 2x2 - 2x + 7?
- (4x+12) + (2x2–6x+5)
• (x2–5x+13)+(x2 +3X-6)
. (4x? -6x+ 11 ) + (2x² - 4x+4)
(5x® – 8x+120) + (-3x2 + 10x= 13)​

Answers

It basically (B) since it’s substituting x=0

Answer:

B) [tex](x^2 - 5x + 13) +(x^2 + 3x - 6)\\[/tex]

Step-by-step explanation:

Let's simplify the given options and find the correct answer.

The given expression is [tex]2x^2 - 2x + 7[/tex]

Let's take the option A and simplify.

[tex]-(4x + 12) + (2x^2 - 6x + 5)[/tex]

Distributing the negative sign and simplify.

[tex]-4x - 12 + 2x^2 -6x + 5[/tex]

Simplify the like terms.

[tex]2x^2 -10x - 7[/tex]

Which is not equal to the given expression.

Let's take the option B and simplify.

[tex](x^2 - 5x + 13) +(x^2 + 3x - 6)\\[/tex]

Simplify the like terms, we get

[tex]x^2 + x^2 -5x +3x +13 -6[/tex]

[tex]2x^2 -2x +7[/tex]

Which is equal to the given expression [tex]2x^2 -2x +7[/tex]

Therefore, the answer is B) [tex](x^2 - 5x + 13) +(x^2 + 3x - 6)\\[/tex]

Ify is 2.5 when x is 5 and y varies directly with x, find y when x is 10.
5
7.5
12.5
20

Answers

Answer:A

Step-by-step explanation:

Y varies directly as x

Y = kx

When y = 2.5, x = 5

Substitute the value of y and x

2.5 = k * 5

Make k the subject of the formula

k = 2.5/5

k = 1/2

:. The equation connectin y and x is

Y = 1/2x

When x = 10

Y = 1/2*10

Y = 10/2

Y = 5

Mahimi has x dollars for food. She wants to buy lunch and still have $2 left over to buy a snack later. How can mahimi represent how much she can spend on lunch

Answers

Answer:

x-2 dollars is the lunch money

The expression x-2 represents the spending amount on the lunch.

What is an expression?

One mathematical expression makes up a term. It might be a single variable (a letter), a single number (positive or negative), or a number of variables multiplied but never added or subtracted. Variables in certain words have a number in front of them. A coefficient is the number used before a phrase.

Given:

Mahimi has x dollars for food.

She wants to buy lunch and still have $2 left over to buy a snack later.

To find the spending amount on the lunch:

She spent on the lunch,

= $(x - 2).

Therefore, x -2 is the expression.

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During the spring and summer, a concession stand at a community Little League baseball game field sells soft drinks and other refreshments. To prepare for the season, the concession owner refers to the previous year’s files, in which he had recorded the daily soft drinks sales (in gallons) and the average daily temperature (in degrees Fahrenheit). Using the coordinates of the two points (84,80) and (74,65), determine the slope of the line of best fit.

Answers

Answer:

1.5

Step-by-step explanation:

m=80-65/84-74

=15/10

1.5

*Since this is an application problem, we can use decimals.*

Answer:

The slope of the line is 1.5

Step-by-step explanation:

To know the slope of a line we can have the equation or to know points of the line. In this case from the graph we have to points (84,80) and (74,65). Having this and using the equation to calculate the slope, we have:

[tex]m=\frac{y2-y1}{x2-x1} \\[/tex]

Defining:

[tex](x1=84,y1=80)[/tex] and [tex](x2=74,y2=65)[/tex]

Now using the equation:

[tex]m=\frac{65-80}{74-84}[/tex]

[tex]m=\frac{-15}{-10} \\m=\frac{15}{10} =1.5[/tex]

The slope of the line is 1.5

This graph shows the solution to which inequality?

Answers

[tex]m=\frac{y2-y1}{x2-x1} \\ \\ m=\frac{2-(-6)}{3-(-3)} \\ \\ m=\frac{8}{6} \\ \\ m=\frac{4}{3}[/tex]

The y-intercept of the graph is -2

The graph is shaded upwards, so we will be using the greater than symbol, but since the line is dotted we will not be using any of the "equal to" symbols.

Hence, the solution of the graph is [tex]y>m=\frac{4}{3} x-2[/tex]

Answer:

Option: C is the correct answer.

              C.   [tex]y>\dfrac{4}{3}x-2[/tex]

Step-by-step explanation:

By looking at the graph we observe that the line is dotted this means that the inequality will be strict.

Also, this line passes through the point (-3,-6) and (3,2).

Hence, the equation of line is calculated by using a two point form i.e. a line passing through two  points (a,b) and(c,d) is calculated with the help of formula as:

[tex]y-b=\dfrac{d-b}{c-a}\times (x-a)[/tex]

Here (a,b)=(-3,-6) and (c,d)=(3,2)

i.e.

[tex]y-(-6)=\dfrac{2-(-6)}{3-(-3)}\times (x-(-3)}\\\\i.e.\\\\y+6=\dfrac{2+6}{3+3}\times (x+3)\\\\i.e.\\\\y+6=\dfrac{8}{6}\times (x+3)\\\\i.e.\\\\y+6=\dfrac{4}{3}\times (x+3)\\\\i.e.\\\\y+6=\dfrac{4}{3}x+4\\\\i.e.\\\\y=\dfrac{4}{3}x-2[/tex]

Also, the shaded region is towards the origin.

                    Hence, the inequality is:

                  [tex]y>\dfrac{4}{3}x-2[/tex]

What is the cube root of -729a9b6

Answers

ANSWER

[tex]\sqrt[3]{- 729{a}^{9} {b}^{6} } = - 9 {a}^{3} {b}^{2} [/tex]

EXPLANATION

We want to find the cube root of

[tex] - 729 {a}^{9} {b}^{6} [/tex]

We express this symbolically as:

[tex] \sqrt[3]{- 729 {a}^{9} {b}^{6} } [/tex]

The expression under the radical called the radicand.

We need to express this radical in exponential form using the property,

[tex] {x}^{ \frac{m}{n} } = \sqrt[n]{ {x}^{m} } [/tex]

Applying this rule gives us:

[tex]\sqrt[3]{- 729 {a}^{9} {b}^{6} } = ({- 729 {a}^{9} {b}^{6}})^{ \frac{1}{3} } [/tex]

[tex]\sqrt[3]{- 729{a}^{9} {b}^{6} } = ({- {9}^{3} {a}^{9} {b}^{6}})^{ \frac{1}{3} } [/tex]

Recall that

[tex] ({a}^{m} )^{n} = {a}^{mn} [/tex]

We apply this rule on the RHS to get,

[tex]\sqrt[3]{- 729{a}^{9} {b}^{6} } = ({- {9}^{3 \times { \frac{1}{3} } } {a}^{9 \times { \frac{1}{3} } } {b}^{6 \times { \frac{1}{3} } }})[/tex]

This simplifies to

[tex]\sqrt[3]{- 729{a}^{9} {b}^{6} } = - 9 {a}^{3} {b}^{2} [/tex]

Answer:

-9a3b2

Step-by-step explanation:

You toss a coin and roll a number cube. Find P(heads and an even number).

Answers

The probability of getting heads on a coin toss is 1/2

The probability of getting an even number rolling a number cube is 1/2 ( 3 even numbers out of 6 total numbers).

To find the probability of both happening, multiply each probability by each other:

1/2 x 1/2 = 1/4

What is the value of the expression when c = 4 c/2

Answers

Answer:

32

Step-by-step explanation:

Plug in 4 for c.

(c³)/2 = (4³)/2

First, solve the parenthesis, then divide. Multiply:

4³ = 4 * 4 * 4 = 16 * 4 = 64

Next, divide:

64/2 = 32

32 is your answer.

~

3.1x−16.3=−0.8​
URGENT
find the value of x please

Answers

Answer:

x =5

Step-by-step explanation:

3.1x−16.3=−0.8

Add 16.3 to each side

3.1x−16.3+16.3=−0.8+16.3

3.1x = 15.5

Divide each side by 3.1

3.1x = 15.5/3.1

x =5

24 people go to joe's birthday party.half walk and a quarter travel by bus all the others go by taxi. How many guests walk?

Answers

Answer:

12 guest walk

Step-by-step explanation:

Total number of people that went to the party= 24 (let this be represented as y)

Half of the people walk, this means 1/2 × y   ----------- walk, where y=24 people

Hence half of 24= [tex]\frac{24}{2} =12[/tex]

12 people walked.

5, 6, 7, 8, 9, 10, 11 What is the interquartile range of the data set?

Answers

Answer:

The IQR = 4.

Step-by-step explanation:

The median is the middle number so it is 8.

The lower quartile is 6  (the middle number of those less than 8).

In a similar way the upper quartile is 10.

The interquartile range is 10 - 6 = 4.

Final answer:

To find the interquartile range of the data set 5, 6, 7, 8, 9, 10, 11, we calculate Q3 (10) - Q1 (6), which results in an IQR of 4.

Explanation:

The question asks for the interquartile range (IQR) of the data set 5, 6, 7, 8, 9, 10, 11. The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) in a data set, representing the spread of the middle 50 percent of the data.

Step-by-step Calculation

First, arrange the data in ascending order, which has already been done: 5, 6, 7, 8, 9, 10, 11.

To find Q1, calculate the median of the lower half. Here, Q1 is 6 (the median of 5, 6, 7).

To find Q3, calculate the median of the upper half. Here, Q3 is 10 (the median of 9, 10, 11).

Finally, calculate the IQR by subtracting Q1 from Q3: IQR = Q3 - Q1 = 10 - 6 = 4.

Thus, the interquartile range of this data set is 4.

If a circle has a diameter with end points: (4 + 6i) and (-2 + 6i),
1. Show me how you would determine the length of the diameter and radius.
2. Show me how you would determine the center of the circle.
3. Determine, mathematically, if (1+9i) lies on the circle. Show how you proved it mathematically.
4. Determine, mathematically, if (2-i) lies on the circle. Show how you proved it mathematically.

Answers

Answer:

Part 1) The diameter is [tex]D=6\ units[/tex]   and the radius is equal to [tex]r=3\ units[/tex]

Part 2) The center of the circle is (1+6i)

Part 3) The point (1+9i) lies on the circle

Part 4) The point (2-i) does not lies on the circle

Step-by-step explanation:

Part 1) Show me how you would determine the length of the diameter and radius.

we have that

The circle has a diameter with end points: (4 + 6i) and (-2 + 6i)

we know that

The distance between the end points is equal to the diameter

the formula to calculate the distance between two points is equal to

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

(4 + 6i) ----> (4,6)

(-2 + 6i) ---> (-2,6)

substitute the values

[tex]d=\sqrt{(6-6)^{2}+(-2-4)^{2}}[/tex]    

[tex]d=\sqrt{(0)^{2}+(-6)^{2}}[/tex]    

[tex]d=6\ units[/tex]    

therefore

The diameter is [tex]D=6\ units[/tex]    

The radius is equal to [tex]r=6/2=3\ units[/tex]    ---> the radius is half the diameter

Part 2) Show me how you would determine the center of the circle

we know that

The center of the circle is equal to the midpoint between the endpoints of the diameter

The circle has a diameter with end points: (4 + 6i) and (-2 + 6i)

The formula to calculate the midpoint between two points is equal to

[tex]M(\frac{x1+x2}{2},\frac{y1+y2}{2})[/tex]

substitute

[tex]M(\frac{4-2}{2},\frac{6+6}{2})[/tex]

[tex]M(1,6})[/tex]

therefore

(1,6) ----> (1+6i)

The center of the circle is (1+6i)

Part 3) Determine, mathematically, if (1+9i) lies on the circle. Show how you proved it mathematically

Find the equation of the circle

[tex](x-h)^{2}+(y-k)^{2}=r^{2}[/tex]

we have

The center is (1+6i) -----> (1,6)

r=3 units

substitute

[tex](x-1)^{2}+(y-6)^{2}=3^{2}[/tex]

[tex](x-1)^{2}+(y-6)^{2}=9[/tex]

Verify if the point (1+9i) lies on the circle

Remember that

If a point lies on the circle, then the point must satisfy the equation of the circle

Substitute the value of x and the value of y in the equation and then compare the results

we have

the point (1+9i) -----> (1,9)

[tex](1-1)^{2}+(9-6)^{2}=9[/tex]

[tex](0)^{2}+(3)^{2}=9[/tex]

[tex]9=9[/tex] -----> is true

therefore

The point (1+9i) lies on the circle

Part 4) Determine, mathematically, if (2-i) lies on the circle. Show how you proved it mathematically

The equation of the circle is equal to

[tex](x-1)^{2}+(y-6)^{2}=9[/tex]

Verify if the point (2-i) lies on the circle

Remember that

If a point lies on the circle, then the point must satisfy the equation of the circle

Substitute the value of x and the value of y in the equation and then compare the results

we have

the point (2-i) -----> (2,-1)

[tex](2-1)^{2}+(-1-6)^{2}=9[/tex]

[tex](1)^{2}+(-7)^{2}=9[/tex]

[tex]50=9[/tex] -----> is not true

therefore

The point (2-i) does not lies on the circle

Final answer:

To determine the length of the diameter and radius, use the distance formula. The center of the circle can be found by finding the midpoint of the diameter's end points. To determine if a point lies on the circle, use the distance formula to compare the distance between the point and the center to the radius.

Explanation:

1. Determining the length of the diameter and radius:

To find the length of the diameter, we can use the distance formula. The distance between two complex numbers (a + bi) and (c + di) is given by the formula √((c-a)^2 + (d-b)^2). In this case, the two end points of the diameter are (4 + 6i) and (-2 + 6i). Using the formula, the distance is √((-2-4)^2 + (6-6)^2) = √((-6)^2 + 0) = √(36) = 6.

The radius of a circle is half the length of the diameter. Therefore, the radius of this circle is 6/2 = 3.

2. Determining the center of the circle:

The center of the circle is the midpoint between the two end points of the diameter. To find the midpoint, we can take the average of the x-coordinates and the average of the y-coordinates. In this case, the x-coordinates of the end points are 4 and -2, and the y-coordinates are 6. Taking the averages, the x-coordinate of the center is (4 + (-2))/2 = 1 and the y-coordinate of the center is (6 + 6)/2 = 6. Therefore, the center of the circle is the complex number 1 + 6i.

3. Determining if (1 + 9i) lies on the circle:

To determine if a point lies on the circle, we can check if the distance between the center of the circle and the point is equal to the radius. Using the distance formula again, the distance between the center (1 + 6i) and the point (1 + 9i) is √((1-1)^2 + (9-6)^2) = √(0 + 9) = √(9) = 3. Since the distance is equal to the radius, we can conclude that (1 + 9i) does lie on the circle.

4. Determining if (2 - i) lies on the circle:

Using the same process, we find that the distance between the center (1 + 6i) and the point (2 - i) is √((2-1)^2 + (-1-6)^2) = √(1 + 49) = √(50). Since √(50) is not equal to the radius (3), we can conclude that (2 - i) does not lie on the circle.

Translate the following phrase into an algebraic expression using the variable x to represent the cost of the puck. Do not simplify the cost of purchasing a hockey stick and puck if the stick costs $7 less than twice the cost of the puck

Answers

Final answer:

The algebraic expression for the cost of purchasing a hockey stick and a puck, where the stick costs $7 less than twice the cost of the puck, and using x to represent the cost of the puck, is x + (2x - 7).

Explanation:

To translate the given phrase into an algebraic expression using the variable x to represent the cost of the puck, let's follow the instructions provided in the phrase very carefully. The cost of the hockey stick is described as "$7 less than twice the cost of the puck." Therefore, we first consider "twice the cost of the puck" which is 2x, and then subtract 7 from it to account for the phrase "$7 less than." Hence, the final expression for the cost of the hockey stick is 2x - 7.



Now, to find the cost of purchasing both the hockey stick and the puck, we simply add the cost of the puck (x) to the expression for the cost of the hockey stick (2x - 7), giving us a total cost expression of x + (2x - 7).



Notice that we are not simplifying the expression; we're just writing the combined cost as requested. So the final untranslated expression for the cost of purchasing a hockey stick and a puck based on the given conditions is x + (2x - 7).

what is 8^2 X8^3 as one base ?

Answers

Answer:

8^5

Step-by-step explanation:

Jeff is very tall he is 6 feet 5 inches tall how tall is he in inches

Answers

Answer:

77 inches

Step-by-step explanation:

1 foot=12 inches so what you have to do is 12x6=72 and since he is 6 foot 5 inches you add 5 to get 77.

Please mark brainliest and have a great day!

Factor the Following:

1.) 8
2.) -12
3.) -3y²
4.) 6x²+36x
5.) 7x -14x²​

Answers

Answer:

1.) 8 = 8

2.) -12 = -12

3.) -3y² = -3y²

4.) 6x² + 36x = 6x(x + 6)

5.) 7x - 14x² = 7x(1 - 2x)

~

Paul needs to find 310% of 72. Which expression should he use

Answers

Answer:

3.10 * 72

Step-by-step explanation:

To find 310% of 72

Of means multiply and is means equal

310% * 72 = answer

Change to decimal form

3.10 * 72 = answer

223.20

Answer: (3.10)(72) is the correct answer

Step-by-step explanation:

The cost of performance tickets and beverages for a family of four can be modeled using the equation 4x + 12 = 48, where x
represents the cost of a ticket. How much is one ticket?
$3.00
$4.00
$9.00
$15.00

Answers

Answer:

$9.00

Step-by-step explanation:

4x + 12 = 48   - First, subtract 12 from both sides.

4x = 36           - Then, divide each side by 4 to get x by itself.

x = 9                - After getting x by itself, we see that x = 9, so one ticket will

                         cost $9.00

For this case we have the following equation:

[tex]4x + 12 = 48[/tex]

Where the variable "x" represents the cost of a performance ticket.

Clear "x" of the equation to know the cost of a ticket.

Subtracting 12 on both sides of the equation:

[tex]4x = 48-12\\4x = 36[/tex]

Dividing between 4 on both sides of the equation:

[tex]x = \frac {36} {4}\\x = 9[/tex]

So, the cost of a ticket is $ 9.00

Answer:

Option C

Which equation represents the graphed function ?
Y= -2x+3
Y=2x+3
Y=1/2x +3
Y=-1/2x+3

Answers

Answer:

A

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 = (y₂ - y₁ ) / (x₂ - x₁ )

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

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

note the line crosses the y- axis at (0, 3) ⇒ c = 3

y = - 2x + 3  → A

If you were asked to solve a system of equations in which there are no linear equation to start with you can sometimes begin by isolating and substituting a veritable there a square in both equations true or false

Answers

Answer:

The correct answer option is true.

Step-by-step explanation:

The given statement is true that if there is no linear equation to start with, you can isolate and substitute a variable that is squared in both the equation.

For instance, if we have a non linear equation, start by dividing both sides by coefficient of the variable.

Once you do that and isolate a variable, continue solving by substituting that variable into the other equation.

What is the correct answer

Answers

Answer:

c

Step-by-step explanation:

just took the test

Answer:

B

Step-by-step explanation:

The domain of the function are the input values on the left and the corresponding values on the right are the output values, the range

domain is { 1, 2, 3, 4 }

Solve what x if for the equation below



7x - 4 = 2x + 11

Answers

The answer is x = 3 hope this helps !

Answer:

x = 3

Step-by-step explanation:

Given

7x - 4 = 2x + 11 ( subtract 2x from both sides )

5x - 4 = 11 ( add 4 to both sides )

5x = 15 ( divide both sides by 5 )

x = 3

how do I write 6.741 in expanded form?

Answers

Answer:

6 + 0.7 + 0.04 + 0.001 = 6.741

6 x 1 + 0.1 x 7 + 0.01 x 4 + 0.001 x 1 = 6.741

Multiply X to the 2/5 power times X to the 2/9 power

Answers

Answer:

[tex] x^{\frac{28}{45}} [/tex]

Step-by-step explanation:

To multiply powers with the same base, add the exponents.

[tex] x^{\frac{2}{5}} \times x^{\frac{2}{9}} = [/tex]

[tex] = x^{\frac{2}{5} + \frac{2}{9} [/tex]

[tex] = x^{\frac{2 \times 9}{5 \times 9} + \frac{2 \times 5}{9 \times 5}} [/tex]

[tex] = x^{\frac{18}{45} + \frac{10}{45}} [/tex]

[tex] = x^{\frac{28}{45}} [/tex]

The equation of the circle whose center is at (2, 1) and radius is 3 is

Answers

The equation for that circle would be: (x - 2)^2 + (y - 1)^2 = 9

Answer: The equation of the circle whose center is at (2, 1) and radius is 3 is [tex](x-2)^2+(y-1)^2=9[/tex]

Step-by-step explanation:

We know that the equation  of a circle having center at (h,k) and radius r is given by :-

[tex](x-h)^2+(y-k)^2=r^2[/tex]

Given : The center of the circle :  (2, 1)

The radius of the circle : 3 units

Then the equation of a circle with center at (2, 1) and radius is 3 is will be :-

[tex](x-2)^2+(y-1)^2=3^2\\\\\Rightarrow\ (x-2)^2+(y-1)^2=9[/tex]

please help

What is the slope of the line that is represented by the equation y−15=−6(x+7)?






Answers

Answer:

m = -6

Step-by-step explanation:

Put this given equation into slope-intercept form:

y−15=−6(x+7)  becomes y - 15 = -6x - 42.

Adding 15 to both sides results in y = -6x - 27,

and so the slope is -6.  The y-intercept is -27, or (0, -27).

Answer:

slope m = -6

Step-by-step explanation:

y−15=−6(x+7)

y =−6(x+7) + 15

y =−6x +7(-6) + 15

y =−6x -42 + 15

y =−6x - 27

THis is in slope intercept form where slope m = -6

Andy is learning to play the guitar. Last week he recorded the minutes per day that he practiced. Find the mean absolute deviation. Round to the nearest tenth.

Day S M T W T F S
Minutes 40 55 35 60 20 50 55

Answers

Answer:

11.4

Step-by-step explanation:

Step 1: Calculate the mean.

40, 55, 35, 60, 20, 50, 55

=

315

divided by 7

=

45

Step 2: Calculate how far away each data point is from the mean using positive distances. These are called absolute deviations.

40 - 45 = 5

55 - 45 = 10

35 - 45 = 10

60 - 45 = 15

20 - 45 = 25

50 - 45 = 5

55 - 45 = 10

Step 3: Add those deviations together.

= 80

Step 4: Divide the sum by the number of data points.divided by 7

= 11.428

Step 5: Round to the nearest tenth.

= 11.4

Answer:

The mean absolute deviation is approximately is 11.43.

Step-by-step explanation:

The means absolute deviations is define by:

[tex]D_{x} =\frac{\sum |x_{i}-x| }{N}[/tex]

From the formula, we observe that we need to find the mean, and then find the different between that mean and each element. Then, we have to sum all those differences and divide this by the total number of elements.

So, the mean is

[tex]x=\frac{\sum x_{i} }{N}\\ x=\frac{40+55+35+60+20+50+55}{7}=45[/tex]

Now, each difference would be

[tex]40-45=-5\\55-45=10\\35-45=-10\\60-45=15\\20-45=-25\\50-45=5\\55-45=10[/tex]

The sum of all differences, using their absolute value, would be:

[tex]5+10+10+15+25+5+10=80[/tex]

Then, we divide this result by the total number of elements which is 7:

[tex]\frac{80}{7} \approx 11.43[/tex]

Therefore, the mean absolute deviation is approximately is 11.43.

If b = 7, what is the value of the expression 2(10 – b)?


Answers

Answer:

6

Step-by-step explanation:

10-7=3

2*3=6

Answer:

6

Step-by-step explanation:

Order of operations

PEMDAS

Parenthesis

Exponent

Multiply

Divide

Add

Subtract

[tex]2(10-b)[/tex]

[tex]2(10-7)[/tex]

First, do parenthesis.

[tex]2(10-7)[/tex]

[tex]10-7=3[/tex]

[tex]2(3)[/tex]

Then, multiply to find the answer.

[tex]2*3=6[/tex]

6 is the correct answer.

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