Help! This one step for solving standard deviation I don't understand...

When I got it wrong it tells me what to do but I don't get it? (2nd image)

Answer:

well if we take -12 and divide it by four we will get -3.

Step-by-step explanation:

If we have a total of negative 12, just divide it by 4 and the difference between each division is the sum.

Your answer will be -3 on the number line.

:)

Answer:

Step-by-step explanation:

-12/4 = -3

Answer:

Step-by-step explanation:

C(t)=30+3.5t

hope this help yw and can i get brainly pls

Answer:

to you in 1980 is the lol in lol1234in lol to you in the kids in the lero girl

Answer:

56

Step-by-step explanation:

degree of freedom is n - 1, n being the sample size

One sample of 57 participants in a study (given)

For this study, n = 57

Using the degree of freedom formula, 57 - 1 = 56

Hope it helps, Let me know if yoy have any more questions/concerns !

Have a nice rest of your day :)

Answer:

option C, 6

Step-by-step explanation:

If we subtract 252 - 126

we get 126 then divide by 21 to get 6.

therefore 6 hours

edit: If you liked my answer Brainlist Please.

Answer:

78.5

Step-by-step explanation:

The diameter (d) is equal to the radius x 2, so take half of d to get r. Use r (5) in the equation to get your answer.

A= 3.12 x 5^2

A= 78.5

Answer:

it is 113*

Step-by-step explanation:

hat is the measure of XYZ?

Answer:

533.3mph

Step-by-step explanation:

Answer:

  Bulawayo

Step-by-step explanation:

Proportions can be compared numerous ways. Here, we find it convenient to look at the difference between girls and boys relative to the number of boys.

__

With 35 girls and 25 boys, there are 10 more girls than boys. 10 is less than half of the number of boys, so the ratio of girls to boys is less than 1.5.

With 35 girls and 15 boys, there are 8 more girls than boys. 8 is more than half of the number of boys, so the ratio of girls to boys is more than 1.5.

"More than 1.5" is greater than "less than 1.5", so Bulawayo has the greatest proportion of girls.
_____

Additional comment

As a fraction of the total, the proportions of girls are ...

  Harare: 35/(35+25) = 35/60 = 7/12 = 21/36

  Bulawayo: 22/(22+14) = 22/36 . . . . . . greater than 21/36.

Answer:

8

Step-by-step explanation:

Answer:

f(1) = 0

Step-by-step explanation:

Answer:

I don’t know

Step-by-step explanation:

Answer:

The green would take 4 and the blue would take 16 times respectivly.  I did it by finding the volumes of the cups in terms of pi, then dividing it by the volume of the sink.

Step-by-step explanation:

So the volume of the whole half sphere is 512pi.

Now we have to find the volumes of the cup.

Equation: [tex]\pi r^2h[/tex]

Blue cup:

[tex]\pi 2^2(8)\\\pi 4(8)\\\pi 32[/tex]

It would take 16 times to drain it completly.

Green cup:

[tex]\pi 4^2(8)\\\pi 16(8)\\\pi 128[/tex]

It would take 4 times to drain it completly.

Answer:

m^2+5m+25/4

perfect square trinomial^^

Answer:

5 ft

Step-by-step explanation:

If all sides are of the same length, we can multiply the value of one side by 3, because a triangle has three sides (and the perimeter is all sides added together), to find the perimeter.

[tex]1\frac{2}{3}[/tex] × 3

[tex]1\frac{2}{3}[/tex] can be rewritten as [tex]\frac{5}{3}[/tex], so:

[tex]\frac{5}{3}[/tex] × [tex]\frac{3}{1}[/tex]

[tex]= \frac{15}{3}[/tex]

The numerator & denominator share a common factor of 3, so:

5 ft is the final answer/perimeter.

hope this helps!

Answer:

[tex]\dfrac{dy}{dx}=-y\left(4+\dfrac{1}{x}\right)[/tex]

or written in rational form:

[tex]\dfrac{dy}{dx}=\dfrac{-4xy-y}{x}[/tex]

Step-by-step explanation:

[tex]\ln(xy)+4x=45[/tex]

[tex]\textsf{Apply the product log law}\quad\ln(ab)=\ln(a)+\ln(b):[/tex]

[tex]\implies \ln(x)+\ln(y)+4x=45[/tex]

[tex]\textsf{Add}\:\dfrac{d}{dx}\:\textsf{in front of each term}:[/tex]

[tex]\implies \dfrac{d}{dx}\ln(x)+\dfrac{d}{dx}\ln(y)+\dfrac{d}{dx}4x=\dfrac{d}{dx}45[/tex]

[tex]\textsf{Differentiate the}\: x \: \textsf{terms and constant terms first}:[/tex]

[tex]\implies \dfrac{1}{x}+\dfrac{d}{dx}\ln(y)+4=0[/tex]

[tex]\textsf{When differentiating with respect to}\:y,\: \textsf{differentiate and add}\: \dfrac{dy}{dx}:[/tex]

[tex]\implies \dfrac{1}{x}+\dfrac{1}{y}\dfrac{dy}{dx}+4=0[/tex]

[tex]\textsf{Rearrange to make}\:\dfrac{dy}{dx}\:\textsf{the subject}:[/tex]

[tex]\implies \dfrac{1}{y}\dfrac{dy}{dx}=-4-\dfrac{1}{x}[/tex]

[tex]\implies \dfrac{dy}{dx}=y\left(-4-\dfrac{1}{x}\right)[/tex]

[tex]\implies \dfrac{dy}{dx}=-y\left(4+\dfrac{1}{x}\right)[/tex]

If you want it in rational form, then:

[tex]\implies \dfrac{dy}{dx}=-4y-\dfrac{y}{x}[/tex]

[tex]\implies \dfrac{dy}{dx}=\dfrac{-4xy-y}{x}[/tex]

[tex]~~~~~\ln(xy) +4x = 45\\\\\\\implies \dfrac{d}{dx} \left[\ln(xy) +4x \right] = \dfrac{d}{dx} ( 45)\\\\\\\implies \dfrac{1}{xy} \cdot \dfrac{d}{dx} (xy) + 4 = 0\\\\\\\implies \dfrac 1{xy} \left( x\dfrac{dy}{dx} + y \right) +4 =0\\\\\\\implies x\dfrac{dy}{dx} + y + 4xy=0\\\\\\\implies x \dfrac{dy}{dx} =-y-4xy\\\\\\\implies \dfrac{dy}{dx} = \dfrac{-y-4xy}x[/tex]

Answer:

1 [tex]\frac{41}{42}[/tex]

Step-by-step explanation:

[tex]\frac{83}{42}[/tex] = 83 ÷ 42 = 1 remainder 41 , then

[tex]\frac{83}{42}[/tex] = 1 [tex]\frac{41}{42}[/tex]

Answer:

$110.46

Step-by-step explanation:

1 bath towel is $15.78 we need 7. So the equation is 15.78 x 7 = 110.76.

Answer:

I have got an answer it is false for explanation go to picture

Answer:

Step-by-step explanation:

Combinations of 3 out of 12 items

Combinations 3 out of remaining 9 items

Combinations of 3 out of remaining 6 items

Combinations of 3 out of 3 remaining items

Answer:

[tex]\huge\boxed{\sf Option \ 1}[/tex]

Step-by-step explanation:

People surveyed = 42

People who approved = 25

So, the sample is:

25 residents who approve.

And population:

42 residents surveyed.

[tex]\rule[225]{225}{2}[/tex]

The length of the railing that will fit completely around the deck is 54 feet. The area of the triangular deck is approximately 164.25 square feet.

To find the length of the railing that will fit completely around the triangular deck, we need to calculate the perimeter of the triangle. The perimeter of a triangle is the sum of the lengths of all three sides.

Since each side of the triangular deck is 18 feet long, the perimeter (P) can be calculated as:

P = 18 feet + 18 feet + 18 feet

P = 54 feet

So, the length of the railing that will fit completely around the deck is 54 feet.

Next, let's find the area of the triangular deck. The area of a triangle can be calculated using the following formula:

Area (A) = (1/2) * base * height

Since the triangle is equilateral (all sides have the same length), any side can be considered as the base, and the height can be drawn from any vertex to the midpoint of the opposite side.

Let's consider one of the sides (18 feet) as the base. Now, to find the height, we can draw a perpendicular line from the vertex to the midpoint of the base, creating two right-angled triangles.

The height (h) of one right-angled triangle can be found using the Pythagorean theorem:

[tex]h^2 = (18 feet / 2)^2 + (18 feet)^2\\h^2 = 9 feet^2 + 324 feet^2\\h^2 = 333 feet^2\\[/tex]

h ≈ √333 feet

h ≈ 18.25 feet (rounded to two decimal places)

Now, we can find the area (A) of the triangular deck:

A = (1/2) * base * height

A = (1/2) * 18 feet * 18.25 feet

A ≈ 164.25 square feet (rounded to two decimal places)

So, the area of the triangular deck is approximately 164.25 square feet.

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Answer:

-1

Step-by-step explanation:

Formula to the determinant is:

[tex]\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc[/tex]

0(0)–1(1)

0-1

-1

Answer:

-1

Step-by-step explanation:

Formula: ad-bc

0(0) - 1(1)

0-1

-1

Answer:56 bags

Step-by-step explanation:

you are dividing 40 into 5/7 so its technically 40*7 divided by 5, which equals 56. double check by doing 56*5 divided by 7 and you get 40 pounds,

[tex]\frac{40(7)}{5}[/tex]Answer:

To find out how many can be filled, divide the number of pounds of candy by the number of pounds a single bag can hold.

40 can be considered 40/1.

So,

40/1 ÷ 5/7

Make 5/7 a reciprocal(basically flipping the fraction upside down):

40/1 ÷ 7/5

Convert the division symbol into a multiplication symbol:

40/1 × 7/5

Solve!

[tex]\frac{40(7)}{5}[/tex]

Cancel:

[tex]\frac{8(7)}{1}[/tex]

= 56 bags can be filled.

Answer:

A=10240033.0/pift /ft

Step-by-step explanation:

Calculate the area of circle:

Round the number: A=10240033.0/pift /ft

Answer: A=10240033.0/pift /ft

The radius of the sphere is 4.2 feet.

A sphere is a geometrical shape in three dimension which has every point on the surface of it at an equal distance from a common point called the center of the sphere.

Volume of a sphere is given by the equation,

Volume = [tex]\frac{4}{3}[/tex]πr³, where r is the radius.

We have volume of the given sphere = 320 feet³

Substituting this value in the main equation, we get,

320 =  [tex]\frac{4}{3}[/tex]πr³

320 × 3 = 4πr³

960 / 4π = r³

960 / (4 × 3.14) = r³

r³ = 76.43

r = 4.24 ≈ 4.2

Hence, the radius of the sphere with a volume of 320 feet³ has a radius of 4.2 feet, to the nearest tenth of a foot.

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Answer: 1 3/10

Step-by-step explanation:

first turn it into a fraction 13/10 then how many times does 13 fit into 10. It fits once with 3 remaining. So you get 1 and 3/10

Answer:

  1 3/10

Step-by-step explanation:

When you read the decimal number, it reads the same as the equivalent mixed number:

  1.3 = "one and three tenths" = 1 3/10

__

Additional comment

This will generally be the case. Some mixed numbers found this way can have their fractions reduced:

  1.2 = "one and two tenths" = 1 2/10 = 1 1/5

Answer:

The graph of f(x) = x² was transformed to create the graph of g(x) = f(x) + 1.5. Which statement about the graphs is true?

The vertex of the graph of g is 1.5 units to the left of

the vertex of the graph of f.

B

The y-intercept of the graph of g is 1.5 units above the

y-intercept of the graph of f.

The graph of g is a reflection of the graph of f across

the y-axis.

The graph of g is a reflection of the graph of f across

the x-axis.

Step-by-step explanation:

Let's call C the point on K(O) and segment AO.  I assume you're aware of a 'secant tangent angle theorem', where if you know the measure of arc BC you can solve for angle BAD.  Since CD is a diameter of the circle, the measure of arc CD is 180 degrees - with this you can easily find the measure of all arcs of the circle then apply the theorem