Alfred says that the line shown on the scatter plot is a good line of fit because the line goes through the middle of all the data points. Do you agree? Explain your reasoning

Answer:

k = -12.6

Step-by-step explanation:

Given rational polynomial:

[tex]\dfrac{x^3-2x^2+kx-12}{x-5}[/tex]

When we divide a polynomial f(x) by (x − d) the remainder is f(d).

If the remainder is zero, then (x - d) must be a factor of f(x).

If a cubic polynomial is divided by (x - d) then:

[tex]\implies (x-d)(ax^2+bx+c)[/tex]

where:

If the constant of the cubic polynomial is -12 and d = 5:

[tex]\implies -cd=-12[/tex]

[tex]\implies -5c=-12[/tex]

[tex]\implies c=2.4[/tex]

The leading coefficient of the cubic polynomial is one.  Therefore:

[tex]\implies (x-5)(x^2+bx+2.4)[/tex]

Expand and collect like terms:

[tex]\implies x^3+bx^2+2.4x-5x^2-5bx-12[/tex]

[tex]\implies x^3+(b-5)x^2+(2.4-5b)x-12[/tex]

The find the value of b, compare the coefficients of the term in x²:

[tex]\implies b-5=-2[/tex]

[tex]\implies b=3[/tex]

To find k, substitute the found value of b into the coefficient of x:

[tex]\implies k=2.4-5b[/tex]

[tex]\implies k=2.4-5(3)[/tex]

[tex]\implies k=-12.6[/tex]

Answer:

–12.6

Step-by-step explanation:

[tex] \frac{ \\ {x }^{3} - {2x}^{2} + kx - 12}{x - 5} = 0[/tex]

that means (x–5) is a factor of x³ – 2x² +kx – 12

since it resulted to zero according to the rules of zeros of polynomial.

x–5 = 0

x = 5

by substituting

f(x) = 5³ – 2(5)² + k(5) – 12 = 0

125 – 50 + 5k – 12 = 0

75 + 5k – 12 = 0

5k + 75 – 12 = 0

5k + 63 = 0

5k = –63

[tex] \frac{ \\ 5k}{5} = \frac{ - 63}{5} [/tex]

[tex]k = - 12.6 \: or \: - 12 \frac{3}{5} [/tex]

I hope I helped

Answer: a. To find the age of a shark that is 200 centimeters long, we can set the function equal to 200 and solve for t:

L = 266 - 219e^(-0.05t)

200 = 266 - 219e^(-0.05t)

Solving this equation for t, we get t ≈ 2.11 years.

b. To find the length of a shark that is twice as old as the shark in part (a), we can substitute 2.11*2= 4.22 for t into the function:

L = 266 - 219e^(-0.05(4.22))

This will give us the length of the shark that is twice as old as the shark in part (a) in centimeters.

Answer:The ratio 15:73 represents the ratio of 7th grade football players to total athletes.

Step-by-step explanation:

The answer to the system of equations 3x-2y=3 and -4x+5y=-11 is (6, 7). An equation is a proposition that has two equal sides as well as an equal sign .

what is equation ?

It is thought that a number's simplest form is represented by its smallest equivalent fraction. finding the simplest form: what to do. For shared factors, look into the numerator and denominator. Examine a fractional integer to determine if it is a prime number. An equation is a proposition that has two equal sides as well as an equal sign in the middle. In the general form of any equation, the degrees of all the variables are listed in descending order. The common representation of a system of equations is an x + b = 0. x + b y + c = 0 is the general form of a two-variable linear equation (or something similar). Identity or conditional equations are the two categories under which equations fall. An identity holds true regardless of how the variables are valued.

given

Equation substitution is another name for combining the equations. When one variable is added to another equation, this is done.

-8x - 5y = -13

-4x - 5y = 11

Let's make the second equation a one-variable-on-each-side equation.

-5y = 4x + 11

y = -4/5x - 11/5

Put this into your first equation right now.

-8x - 5(-4/5x - 11/5) = -13

Give out the -5 symbol.

-8x + 4x + 11 = -13

Stack similar phrases.

-4x + 11 = -13

-4x = -24

Divide both sides by -4 to isolate x.

x = -24/-4

x = 6

Reintroduce this to either equation now.

y = -4/5(6) - 11/5

Multiply.

y = -24/5 - 11/5

Subtract.

y = -35/5

Simplify.

y = -7

The answer to the system of equations 3x-2y=3 and -4x+5y=-11 is (6, 7).

To know more about equation visit:

https://brainly.com/question/649785

#SPJ1

The required number below correctly describes 25 A is 0.025 KA. Option A is correct.

Unit of measurement is defined as every entity having its measures in dimensions, weight, and time. Such as for length we have a meter, for liquid we have liters, and so on.

Here,
25 A is the unit of current,
Now,
This unit can be further written as,
25 A = 25 × KA / 1000 = 0.025 KA

The required number below correctly describes 25 A is 0.025 KA. Option A is correct.

Learn more about measurement here:

brainly.com/question/12629581

#SPJ1

Complete question-

which of the numbers below correctly describes 25 A? a) .025 KA, b) .25KA, c) 25,000 uA, d) 2500 mA

Answer:

48 sq cm

Step-by-step explanation:

The smaller square is 3' x 3' = 9 square feet.

The larger square is 9' x 9' = 81 square feet.

9 goes into 81 exactly 9 times (81 / 9 = 9), so we could just multiply the 54 cm by 9 and get your answer in centimetres.

54 x 9 = 486 cm

Answer: 5

Step-by-step explanation: To solve f(x), g(x), or f(g(x)) problems, we place the value of x in the functions with the value that we are given. This value will be f(g(5)) or g(3) or f(27). We plug in the number in the parentheses.

In this problem, we have to first plugin 5 to g(x) then plug g(5) into f(x).

First, we do g(5)=sqrt((5^2)+2). This gives us 3. Then we plug in 3 which is g(5) into f(x). This gives us f(g(5)) or f(3)=sqrt((3^3)-2) which is 5.

If the two graphs are mirror images of one another across the line y = x, then they are inverse functions.[tex]$f(x)=\frac{x}{3}+10$ \\[/tex] and [tex]$g(x)=3 x-10$[/tex]

As for looking at the graphs, we already knew that. You should keep in mind that inverse functions are represented by two graphs that are mirror images of one another over the line y = x. The broadest definition of an inverse function is one that "reverses" another function.

The inverse, for instance, must take b to an if a function goes from a to b. When the first and second elements of each pair in the original function are switched, a set of ordered pairs is obtained that is known as the inverse of the function. The act of switching the x and y coordinates is known as obtaining an inverse. They aren't opposites. The output of the first function is sent through an inverse function, which then generates an output whose input was the first function.

So, option A) [tex]$f(x)=\frac{x}{3}+10$ \\[/tex] and [tex]$g(x)=3 x-10$[/tex] is the appropriate response.

To learn more about inverse function refer to :

https://brainly.com/question/3831584

#SPJ1

Answer:

False

Step-by-step explanation:

A two-tailed test requires that the null hypothesis use the equal (=) sign. Rejection of the null can happen in either direction. (Ex. a test statistic that i either too high, or too low). Anything other than equal (Ex. the null hypothesis is either, "greater than or equal to", or, "less than or equal to"), indicates a one-tailed test.

Answer:

The slope is 1.  It is the number before the x.  If we do not see a number, we assume that the number is 1.

Step-by-step explanation:

Answer:

The slope: 1

Step-by-step explanation:

The slope is simply the number in front of the x ONLY in the form y=mx+b, which it is currently in. If it is not in that form, try and manipulate the equation to put it into that form.

Moreover, if it is just x by itself imagine there being a 1 in front of it.

The answer: 1

34x56x79447886447567

Answer: x=-1,y=4

Step-by-step explanation:

x + y = 3

y = x + 5

subtract x from both sides of the equation so you get

x + y = 3

-x + y = 5

use the elimination method and you'll get

2y = 8

simplify and

y = 4

now use that to get x

x + 4 = 3

x = -1

Therefore, the answer is

x = -1, y = 4

Answer:

x=-1, y=4. (-1, 4).

Step-by-step explanation:

x+y=3

y=x+5

----------

x+(x+5)=3

x+x+5=3

2x+5=3

2x=3-5

2x=-2

x=-2/2

x=-1

y=-1+5=4

By dividing the circle's diameter by, you may determine a circle's circumference (pi). By dividing 2radius by pi, or 3.14, you may also determine the circumference.

R denotes the circle's radius.

Again,

and C = D

Circumference = 2r

= 2 x 3.14 x 4

= 25.12 cm

To Learn more About circle's circumference refer to:

https://brainly.com/question/18571680

#SPJ1

a) The inequality showing the number of push-ups Jada needs to do each day for the rest of the week to meet her goal of 100 push-ups for the week is 30 + 6x ≥ 100.

b) The solution to the inequality shows D. Jada needs to do at least 12 push-ups each day for the rest of the week to meet her goal

Inequality is a mathematical statement that two or more mathematical expressions are unequal and not equivalent.

Inequalities are depicted in the following ways:

The total number of full push-ups for the week = 100

The number of push-ups done on Sunday = 30

The remaining number of push-ups for 6 days = 70 (100 - 30)

30 + 6x ≥ 100

6x ≥ 70

x ≥ 12

Learn more about inequalities at https://brainly.com/question/25275758

#SPJ1

142 9/10



6*23=138, 138+4 9/10=142 9/10

47.925 can be written as a mixed number as 47(925/1000).

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

47.925

This can be written as,

= 47925 / 1000

Now,

47925 = 47000 + 925

1000 x 47 = 47000

So,

47925/1000

= 47(925/1000)

Thus,

The mixed number is 47(925/1000)

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ1

Answer:

10

Step-by-step explanation:

10 is 10 units away from 0 on a number line

-9 is only 9 units away from 0 on a number line

The farthest away from 0 would be 10

The combinations between the linear function g(x) = 4 · x + 1 and the quadratic function g(x) = 4 · x + 1 are f ° g (x) = 16 · x² + 44 · x + 10 and g ° f (x) = 4 · x² + 36 · x + 1, respectively.

Let be f(x) and g(x) a linear function and a quadratic function, respectively. The composition between two functions is represented below:

f ° g (x) = f [g(x)]

g ° f (x) = g [f(x)]

Where the input of the former function is substituted by the latter function. Now we proceed to find the resulting function:

f(x) = x² + 9 · x

g(x) = 4 · x + 1

f ° g (x) = (4 · x + 1)² + 9 · (4 · x + 1)

f ° g (x) = 16 · x² + 8 · x + 1 + 36 · x + 9

f ° g (x) = 16 · x² + 44 · x + 10

g ° f (x) = 4 · (x² + 9 · x) + 1

g ° f (x) = 4 · x² + 36 · x + 1

To learn more on composition of functions: https://brainly.com/question/29127818

#SPJ1

Answer:

3 - 1

12 - 4

21 - 7

Step-by-step explanation:

Answer:

youd start and see that you can divide 12/3 this gives you 4 you then divide 4/4 and find 1 so he can do 3 lawns in 1 hour thus you just mutiplltiply each side by 7 so it'd be 21 and 7

Step-by-step explanation:

should look like this

3          1

12         4

21         7

The length of other side is 20.8 in the given triangle.

What is a triangle ?

triangle can be defined in which it consists of three sides and three angles and sum of all the angles is always 180 degrees .

Given in the triangle ,

AC = 27 cm

AB = 9 cm

CAB = 74 degrees

a2 = b2 + c2 – 2bc cos ∠x

a2 = 27*27 + 9*9 - 2*27*9*cos74

a2 = 529 + 81 - 486*0.27

a2 = 610-486*0.27

a2 = 610-131.22

a2 = 479

a= [tex]\sqrt{479}[/tex]

a = 20.8  (approximately)

Hence the length of other side is 20.8 in the given triangle.

To learn more about triangle from the given link.

https://brainly.com/question/2773823

#SPJ1

Factors of  [tex]$$4(x-y)^3-x+y$$[/tex] are [tex]4 x^3-12 x^2 y+12 x y^2-4 y^3-x+y[/tex] and [tex]$16 x^{16}-1$[/tex], respectively, are [tex]\left(4 x^8+1\right)\left(2 x^4+1\right)\left(2 x^4-1\right)\end{aligned}$$[/tex].

Let's incrementally simplify.

[tex]$$4(x-y)^3-x+y$$[/tex]

Distribute:

[tex]$$=4 x^3+-12 x^2 y+12 x y^2+-4 y^3+-x+y$$$=4 x^3-12 x^2 y+12 x y^2-4 y^3-x+y$[/tex]

Factor [tex]$16 x^{16}-1$[/tex]

[tex]$$\begin{aligned}& 16 x^{16}-1 \\& =\left(4 x^8+1\right)\left(2 x^4+1\right)\left(2 x^4-1\right)\end{aligned}$$[/tex]

When you factorize a number in mathematics, you divide it into smaller numbers that, when multiplied together, give you the original number. Factorization occurs when a number is divided into its components or divisors. For illustration, the factorization of the integer 12 can appear as 3 times 4. When you factorize a number in mathematics, you divide it into smaller numbers that, when multiplied together, give you the original number. Factorization occurs when a number is divided into its components or divisors. For illustration, the factorization of the integer 12 can appear as 3 times 4. Each check takes longer on average due to the larger size of our product and the larger size of the numbers we use to verify it.

To learn more about factorization refer to :

https://brainly.com/question/25829061

#SPJ1

Answer:

≈51.55

Step-by-step explanation:

∆/360 πD = 7.2

x/360 *22/7*16= 7.2

x/360 *50/2/7= 7.2

x/360 = 63/440

x =51.54545455

≈51.55

Answer:there you go

Step-by-step explanation:

use a graphing calc

The equivalent exponential equations are given as follows:

[tex]2^{4x} = 2^{3(x - 3)}[/tex]

The exponential expression for this problem is defined as follows:

[tex]2^{4x} = 8^{x - 3}[/tex]

The number eight is the third power of 3, that is:

8 = 2³.

The power of a power rule is used when a single base is elevated to multiple exponents.

Then the simplified expression is obtained keeping the base, while the exponents are multiplied.

Meaning that the equivalent expression on the right side of the equality in this problem is given as follows:

[tex]8^{x - 3} = (2^3)^{x - 3} = 2^{3(x - 3)}[/tex]

Meaning that the correct option is given by the fourth option.

More can be learned about the power of a power property at brainly.com/question/11975096

#SPJ1

Answer:0.093333333333

Step-by-step explanation:

Answer: To calculate the balance of the savings plan after 9 months with an APR of 3% and monthly payments of $200, we need to take into account the interest earned on the account.

First, we will calculate the interest earned by multiplying the principal (initial amount) by the interest rate (APR) and the number of months.

Interest = Principal * Interest Rate * Number of months

Interest = 200 * 0.03 * 9 = 54

Then, we will add the interest earned to the total amount of payments made.

Total = Principal + Interest + Payments

Total = 200 + 54 + (200 * 9) = 200 + 54 + 1800 = 2054

So the savings plan balance after 9 months with an APR of 3% and monthly payments of $200 is $2054.

Step-by-step explanation:

Answer:

x = 22.5°

3x = 67.5°

5x = 112.5°

7x = 157.5°

Step-by-step explanation:

You have both 2° and x for the measure of the first angle. I used x°.

Sum of the measures of the interior angles of a polygon

For an n-sided polygon:

(n - 2)180° = 2(180°) = 360°

x° + 3x° + 5x° + 7x° = 360°

16x = 360

x = 22.5°

3x = 67.5°

5x = 112.5°

7x = 157.5°