What is the r-value of the following data to three decimal places?

A. -0.811
B. 0.811
C. 0.901
D. -0.901

You can factor -80 as

[tex]-80 = (-1)\cdot 16 \cdot 5[/tex]

So, we have

[tex]\sqrt{-80} = \sqrt{(-1)\cdot 16 \cdot 5}[/tex]

The square root of a product is the product of the square roots:

[tex]\sqrt{-80} = \sqrt{(-1)}\sqrt{16}\sqrt{5}[/tex]

Since [tex]i^2=-1[/tex] and [tex]4^2=16[/tex], we have

[tex]\sqrt{-80} = 4i\sqrt{5}[/tex]

The equivalent expression of the complex expression √(-80) will be 4i√5. Then the correct option is C.

A complex number is a number that is made up of both real and imaginary numbers. The complex number can be given as a + ib where a is the real part and ib is the imaginary part.

The expression is given below.

⇒ √(-80)

And we know that √(-1) = i

Then the expression can be written as

⇒ √(-1 x 16 x 5)

⇒ 4i√5

More about the complex number link is given below.

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Answer:

Marginal distribution of political party. Choice B

Step-by-step explanation:

The Democrat is a political party. The voters are registered as either, Democrats, Republicans or Others. This implies that a voter selected at random regardless of gender will either be a Democrat a Republican or affiliated to Other political parties.

Therefore, the percent of all voters that are registered Democrats is part of the marginal distribution of political party

Answer:

[tex]\large\boxed{V=50\pi\ yd^3\approx157\ yd^3}[/tex]

Step-by-step explanation:

The formula of a volume of a cylinder:

[tex]V=\pi r^2H[/tex]

r - radius

H - height

We have the diameter d = 2r = 5yd → r = 2.5yd and the height H = 8yd.

Substitute:

[tex]V=\pi(2.5)^2(8)=\pi(6.25)(8)=50\pi\ yd^3\\\\\pi\approx3.14\to V\approx(50)(3.14)=157\ yd^3[/tex]

No hay relaion porque su hermana "mona", es su mascota

Answer:

The measure of angle EYH is [tex]25\°[/tex]

Step-by-step explanation:

step 1

Find the measure of arc EH

we know that

[tex]arc\ EV+arc\ VL+arc\ HL+arc\ EH=360\°[/tex] ----> by complete circle

substitute the given values

[tex]130\°+110\°+40\°+arc\ EH=360\°[/tex]

[tex]280\°+arc\ EH=360\°[/tex]

[tex]arc\ EH=360\°-280\°=80\°[/tex]

step 2

Find the measure of angle EYH

we know that

The measurement of the outer angle is the semi-difference of the arcs which comprises

[tex]m<EYH=\frac{1}{2}(arc\ EV-arc\ EH)[/tex]

substitute the values

[tex]m<EYH=\frac{1}{2}(130\°-80\°)=25\°[/tex]

Answer:

Expanded form means to write the standard form as an equation with addition

so, 3919 would be 3000 + 900 + 10 + 9

Step-by-step explanation:

[tex]\text{Hey there!}[/tex]

[tex]\text{Write 3,919}[/tex]

[tex]\text{Expanded form is where you basically when you write the numbers in a}[/tex] [tex]\text{individual formation (e.g. a + a + a + a)}[/tex]

[tex]\text{3 = 3,000 since it's in the THOUSANDS place}[/tex]

[tex]\text{9 = 900 since it's in the HUNDREDS place}[/tex]

[tex]\text{1 = 10 because it is in the TENS place}[/tex]

[tex]\text{9 = 9 because it is in the ONES place}[/tex]

[tex]\boxed{\boxed{\text{Answer: 3,000 + 900 + 10 + 9}}}\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

Step-by-step explanation:

[tex]5(y+1)-7=3(y-1)+2y\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\5y+5-7=3y-3+2y\qquad\text{combine like terms}\\\\5y+(5-7)=(3y+2y)-3\\\\5y-2=5y-3\qquad\text{subtract}\ 5y\ \text{from both sides}\\\\-2=-3\qquad\bold{FALSE}[/tex]

Answer:

x ≈ 11.68 ( to 2 dec. places )

Step-by-step explanation:

Given

[tex]6^{(x-8)}[/tex] = 730 ( take log of both sides )

log [tex]6^{(x-8)}[/tex] = log730

(x - 8)log6 = log730 ( divide both sides by log6 )

x - 8 = [tex]\frac{log730}{log6}[/tex] ≈ 3.68 ( add 8 to both sides )

x ≈ 11.68 ( to 2 dec. places )

Answer:

6^ 3.679648309

Step-by-step explanation:

Don't really have one. Went with trial and error. Set calculator to 2 d.p by the way

Step-by-step explanation:

a1 is the first term.  In this case, 2.

r is the common ratio.  Each term is multiplied by -3 to get the next term, so r = -3.

an = 2 (-3)ⁿ⁻¹

Answer:

C. [tex]f(x)=(x-(7-i))(x-(5+i))(x-(7+i))(x-(5-i))[/tex]

Step-by-step explanation:

We want to find the equation of a polynomial the following properties;

i. Leading coefficient is 1

ii. roots (7 + i) and (5 – i) with multiplicity 1

Recall the complex conjugate properties of the roots of a polynomial.

According to this property, if

[tex]a+bi[/tex] is a root of a polynomial, then the complex conjugate, [tex]a-bi[/tex]  is also a root.

This means that:

(7 - i) and (5 + i) with multiplicity 1 are also roots of this polynomial.

The complete set of roots are:

[tex]x=(7+i),x=(7-i),x=(5-i),x=(5+i)[/tex]

Therefore the polynomial is:

[tex]f(x)=(x-(7-i))(x-(5+i))(x-(7+i))(x-(5-i))[/tex]

The correct choice is C.

Final answer:

The correct polynomial function with roots (7 + i) and (5 – i), each with multiplicity 1 and a leading coefficient of 1, is given by (c) f(x) = (x – (7 + i))(x – (5 – i))(x – (7 - i))(x – (5 + i)).

Explanation:

The question asks which polynomial function has a leading coefficient of 1 and roots (7 + i) and (5 – i) with multiplicity 1. For a polynomial to have these roots, its conjugates, (7 - i) and (5 + i), must also be roots because complex roots always come in conjugate pairs if the polynomial has real coefficients.

This leads us to option (c) as the correct answer. To form a polynomial with these roots, we take each root, turn it into a binomial by subtracting it from x, and then multiply these binomials together.

Doing so for the given roots, we get:

f(x) = (x – (7 + i))(x – (5 – i))(x – (7 - i))(x – (5 + i))

This polynomial matches option (c), confirming it as the correct answer.

Your answer would be C.

Step-by-step explanation:

250 dollars. 250-100= 150. 150/20 equls 7.5. 7.5 will round to 8. It iwll be 8 hours hey will have to pay for.

A = person is under 20

B = person is over 60

P(A or B) = P(A) + P(B) ... works because A and B are mutually exclusive

P(A or B) = 0.30 + 0.17

P(A or B) = 0.47 = 47%

The probability that a person chosen at random is under 20 or over 60 is 47% , option C is the correct answer.

Probability is a topic in mathematics  where the likeliness of an event is studied.

The range of probability is 0 to 1 .

0 indicates uncertainty to 1 indicating certainty.

It is given in the question that

30% of the U.S. population is under 20 years old

About 17% of the population is over 60

probability that a person chosen at random is under 20 or over 60 = ?

Let P(A) represents person under 20

Let P(B) represents person over 60

As a person is chosen at random and the events cannot happen together so they are mutually exclusive events.

The probability for mutually exclusive event is given by

P(A or B) = P(A) + P(B)

P(A) = 17% = 0.17

P(B) = 30% = 0.3

P(A or B) = 0.30 + 0.17

P(A or B) = 0.47 = 47%

Therefore , the probability that a person chosen at random is under 20 or over 60 is 47% , option C is the correct answer.

To know more about Probability

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Answer:  C)  g(x) = 2ˣ⁻³ + 2

Step-by-step explanation:

The general form of an exponential equation is: g(x) = 2ˣ⁻ᵃ + b   where

The new function is shifted UP 2 units and RIGHT 3 units

--> g(x) = 2ˣ⁻³ + 2

Answer: 0.9839

Step-by-step explanation:

X Values

∑ = 15

Mean = 3

∑(X - Mx)2 = SSx = 10

Y Values

∑ = 35

Mean = 7

∑(Y - My)2 = SSy = 50

X and Y Combined

N = 5

∑(X - Mx)(Y - My) = 22

R Calculation

r = ∑((X - My)(Y - Mx)) / √((SSx)(SSy))

r = 22 / √((10)(50)) = 0.9839

Meta Numerics (cross-check)

r = 0.9839

Answer:

Step-by-step explanation:

According to the problem, we have to find [tex]y[/tex] which refers to the mean of y-values.

So, we just have to find the mean:

[tex]y=\frac{3+5+6+9+12}{5}=\frac{35}{5}=7[/tex]

Therefore, the right answer is C.

Remember that the mean is defined as the quotient betwene the sum of all values, and the total number of them. In this case, the sum is 35 and the total number is 5.

Answer:

Last option

[tex]y = 3cos(\pi(x+2)) + 5[/tex]

Step-by-step explanation:

The general cosine function has the following form  

[tex]y = Acos(b(x-\phi)) + k[/tex]

Where A is the amplitude: half the vertical distance between the highest peak and the lowest peak of the wave.  

[tex]\frac{2\pi}{b}[/tex] is the period: time it takes the wave to complete a cycle.

k is the vertical displacement.

[tex]\phi[/tex] is the shift phase

In this problem :

[tex]A = 3[/tex]

[tex]\frac{2\pi}{b}=2\\\\ b=\frac{2\pi}{2}\\\\ b=\pi[/tex]

[tex]\phi =-2\\\\k = 5[/tex]

So  The function is:

[tex]y = 3cos(\pi(x+2)) + 5[/tex]

ANSWER

Option D is correct

EXPLANATION

We resolve the forces into component forms.

[tex]F_1 = 400 \cos(30) i + 400 \sin(30) j[/tex]

[tex]F_1 = 200 \sqrt{3} i +200j[/tex]

Also the second is resolved to obtain,

[tex]F_2= 280 \cos(135) i + 280 \sin(135) j.[/tex]

[tex]F_2= - 140 \sqrt{2} i + 140 \sqrt{2} j[/tex]

To find the resultant vector, V, We add the corresponding components of the two forces to get:

[tex]V=F_1+F_2 [/tex]

[tex] \implies \: V = (200 \sqrt{3} - 140 \sqrt{2} )i + (200 + 140 \sqrt{2})j[/tex]

The correct answer is D.

Answer:

3, 7

Step-by-step explanation:

Since we are asked for the known solutions to f(x) = g(x), we need to consider the values of the functions where x's are the same.

If you look at the table, you will see that f(-9) = g(-9) = 3 and f(2) = g(2) = 7.

The value of x where f(x) = g(x) is 3

According to the given question, we are to find the value of x for which the function f(x) is equal to g(x)

From the given table, we need to find the point where the values of f(x) = g(x). The value of x at this point is the solution.

Therefore from the table, the value of x where f(x) = g(x) is 3

Learn more on functions here: https://brainly.com/question/3632175

Answer: -70 degrees difference

Step-by-step explanation:

Answer:

-70!!

Step-by-step explanation:hope this helped!

Answer:

-2

Step-by-step explanation:

The output of the function shown is -2 for each of the four inputs.

Answer:

-2

Step-by-step explanation:

-2

Answer:

Option B

Step-by-step explanation:

We know that a parabola is a set of points that are equidistant from a given line, which is the directrix, and a given fixed point called the focus.

So the correct option is option B.

Answer: Option 'B' is correct.

Step-by-step explanation:

Parabola is a curve in which any given point is at equal distance from focus i.e. a fixed point and directrix i.e. a fixed line.

So, it is the set of all points forming  the curve that is equidistant from a single point and a single line.

Hence , option 'B' is correct.

actually box 3 is correct.

because their radiuses are easy to find

but the tangent line is x=-4 or x=4

The option third radius for circle A is 4, the radius for circle B is 3 and the point of intersection is (4,3) and the tangent equation is x = 4 is correct.

It is described as a set of points, where each point is at the same distance from a fixed point (called the center of a circle)

We have two circles in the graph plot:

From the graph plot:

For the circle:A the radius is 4

For the circle:B the radius is 3

The point of intersection point (4, 3)

The tangent line will be:

x = 4

Thus, the option third radius for circle A is 4, the radius for circle B is 3 and the point of intersection is (4,3) and the tangent equation is x = 4 is correct.

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For #11, the answer is C, I’m pretty sure.

For #12, KM = LN, and LM = KN.

I can’t help with the others though, sorry :/

Number 1, the answer is C: $1.34 and number 2 the answer is A:$39.48

Answer 1 one is C next one is A

Step-by-step explanation:

Answer:

Answer: x = 32, y = 25

Step-by-step explanation:

You can write 2 equations that meet the criteria:

The sum of two numbers is 57

x + y = 57

The difference is 7

x - y = 7

Solve the second equation for x, and substitute in the first equation to solve for y

- solve the second equation for x.  

Add y to both sides of the equation

x - y + y = 7 + y

x = 7 + y

- substitute x = 7 + y into the first equation

x + y = 57

(7 + y) + y = 57

7 + 2y = 57

Subtract 7 from both sides of the equation

7 - 7 + 2y = 57 - 7

2y = 50

Divide both sides of the equation by 2 to solve for y

y=25

Insert y = 25 into either equation and solve for x

x - y = 7

x - 25 = 7

Add 25 to both sides of the equation

x - 25 + 25 = 7 + 25

x = 32

Answer: x = 32, y = 25

As a check, plug these values into both equations to make sure that it works

Answer:

Second Option

671 m²; 725 m²

Step-by-step explanation:

The lateral area of a triangular prism is:

[tex]A_L = Ph[/tex]

Where P is the perimeter of the triangular base and h is the height of the prism.

In this case, the perimeter of the triangular base is:

[tex]P = 9 + 6+ 10.82\\\\P = 25.82\ m[/tex]

Then the height is 26 m

Then the lateral area of the prism is:

[tex]A_L = 25.82 * (26)\\\\A_L = 671\ m ^ 2[/tex]

Therefore the surface area of the triangular prism is:

[tex]A = 2A_B + A_L[/tex]

Where [tex]A_B[/tex] is the area of the base.

[tex]A_B = \frac{bh}{2}[/tex]

Where b is the base of the triangle and h is the height

In this case:

[tex]b = 9\ m\\\\h = 6\ m\\\\A_B = \frac{9 * 6}{2}\\\\A_B = 27\ m ^ 2[/tex]

Finally

[tex]A = 2 * 27 + 671\\\\A = 54 + 671\\\\A = 725\ m ^ 2[/tex]

The answer is 671 m²  and  725 m²

Answer:

[tex]671m^{2};725m^{2}[/tex]

Step-by-step explanation:

Answer:

98

Step-by-step explanation:

If half the diagonal is 7 yd, then the full diagonal is 14 yd.

If we call the side length s, then using Pythagorean theorem:

c² = a² + b²

(14)² = s² + s²

196 = 2s²

s² = 98

The area of a square is s², so:

A = s²

A = 98

The area is 98 yd².

Answer:

0.5

Step-by-step explanation:

because while solving a probability question you divide it by thee full number

Answer:

hdndhehhe

Step-by-step explanation:

Answer:

c. $48

Step-by-step explanation:

Answer:

C. Approximately $48

Step-by-step explanation:

Given,

Total amount she have to save this year = $ 580,

The number of months in a year = 12,

So, the amount saved by her in each month

[tex]=\frac{\text{Total amount}}{\text{Number of months}}[/tex]

[tex]=\frac{580}{12}[/tex]

= $ 48.333333..

≈ $ 48

Hence, OPTION C is correct.

Answer:

200

Step-by-step explanation:

25 is 1/4 of 100. 25 x 4 = 100. 100 x 5 = 500