Can someone please help me? :(

\(\hookrightarrow\sf{ 25\% =\dfrac{25}{100}=\boxed{\bf \dfrac{1}{4} }} \\\hookrightarrow\sf{ 40\% =\dfrac{40}{100}=\boxed{\bf \dfrac{2}{5} }} \\\hookrightarrow \sf{16\%=\dfrac{16}{100}=\boxed{\bf\dfrac{4}{25}} } \\ \hookrightarrow\sf{150\%=\dfrac{150}{100}=\boxed{\bf\dfrac{3}{2} }} \\ \hookrightarrow\sf{120\%=\dfrac{120}{100}=\boxed{\bf\dfrac{6}{5} }} \\\hookrightarrow \sf{58\%=\dfrac{58}{100}=\boxed{\bf\dfrac{29}{50}} } \\\hookrightarrow \sf{32\%=\dfrac{32}{100}=\boxed{\bf\dfrac{8}{25} }} \\ \hookrightarrow\sf{175\%=\dfrac{175}{100}=\boxed{\bf\dfrac{7}{4}} } \\ \)

\(\hookrightarrow \sf123\% = \frac{123}{100} = \boxed{\bf1.23} \\ \hookrightarrow \sf2.25\% = \frac{2.25}{100} = \frac{225}{10000} = \boxed{\bf0.0225}\)

The reasonableness of assuming equal standard deviations depends on factors such as sample size, data distribution, and prior knowledge. It is important to assess these factors and make an informed decision based on the specific context and characteristics of the data being analyzed.

To determine whether it is reasonable to assume equal standard deviations when analyzing the data, we need to consider the nature of the data and the underlying assumptions of the statistical analysis method being used.

Assuming equal standard deviations means that we are assuming that the variability of the data is the same across all groups or populations being compared. This assumption is often made in statistical analyses such as analysis of variance (ANOVA) or t-tests when comparing means between groups.

Whether it is reasonable to assume equal standard deviations depends on the specific context and characteristics of the data. Here are a few factors to consider:

Sample size: If the sample sizes for each group or population being compared are similar, it may be more reasonable to assume equal standard deviations. Larger sample sizes provide more reliable estimates of the standard deviation and can help ensure that the assumption is met.

Similarity of data distribution: If the data in each group or population exhibit similar distributions and variability, assuming equal standard deviations may be reasonable. However, if the data distributions are visibly different or have varying levels of variability, assuming equal standard deviations may not be appropriate.

Prior knowledge or research: If there is prior knowledge or research suggesting that the standard deviations are likely to be equal across groups, it may be reasonable to make this assumption. However, if there is prior information indicating unequal standard deviations, it would be more appropriate to consider unequal standard deviations in the analysis.

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Answer:

90/100

Step-by-step explanation:

percentages are fractions out of 100

Answer:

90/100

Step-by-step explanation:

90/100 is the same as 0.9, which is the same thing as 90%!

Hope it helps!

Percentage decrease is 17.29 .

Given :

In 2006, 65.2 million people subscribed to cable television.

In 2013, that number had decreased to 54.2 million.

To Find :

The percent decrease in the number of cable TV subscribers from 2006 to 2013.

So,

Decrease in the number of cable TV subscribers from 2006 to 2013 is :

Percentage decrease = Decrease in subscribers / initial subscribers * 100

% decrease = 63.6 - 52.6 / 63.6 * 100

% decrease = 17.29

Hence the percentage decrement in the tv subscribers are 17.29 .

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Answer:

the difference of 2 times d minus 3= 6

4 added to the difference of d minus 3= 4

the difference of d minus 3 divided by 2= 0

the quotient of 12 divided by the difference of 3 times d minus 3= 2

Step-by-step explanation:

2 times 3 equals 6. 3 minus 3 equals 0. 6-0=6

d minus 3 equals 0. 4+0 equals 4

3 minus d equals 0. 0 divided by two is 0

3 times d= 9. minus 3 = 6. 12 divided by 6 = 2

hope this helps! (:

Answer:  y=759

Step-by-step explanation:

y = (25 - 2) (35 - 2)

y = (23) (33)

y = 759

Answer:

y = 759

Step-by-step explanation:

subtract the numbers

y = 23 (35 - 2)

y = 23 x 33

Multiply the numbers

y = 759

Solution

y = 759

a. About 95% of the scores are between 67 and 85.

b. The probability of a score being no more than 79 is approximately 84%.

c. Approximately 68 scores fell between one standard deviation of the mean.

a. To find the percentage of scores between 67 and 85, we need to calculate the z-scores for these values using the formula z = (x - μ) / σ, where x is the score, μ is the mean, and σ is the standard deviation.

For 67, z = (67 - 76) / 3 = -3, and for 85, z = (85 - 76) / 3 = 3. Then, we can look up the area under the normal curve between these z-scores using a standard normal table or a calculator. The area is approximately 0.9545 or 95.45%, so about 95% of the scores are between 67 and 85.

b. To find the probability of a score being no more than 79, we again need to calculate the z-score using the formula z = (x - μ) / σ. For 79, z = (79 - 76) / 3 = 1.

Then, we can look up the area under the normal curve to the left of this z-score, which is approximately 0.8413 or 84.13%. So, the probability of a score being no more than 79 is approximately 84%.

c. To find the number of scores that fell between one standard deviation of the mean, we need to calculate the upper and lower bounds of this range. The lower bound is μ - σ = 76 - 3 = 73, and the upper bound is μ + σ = 76 + 3 = 79.

Then, we can find the z-scores for these values using the formula z = (x - μ) / σ. For 73, z = (73 - 76) / 3 = -1, and for 79, z = (79 - 76) / 3 = 1. Using a standard normal table or a calculator, we can find the area under the normal curve between these z-scores, which is approximately 0.6827 or 68.27%.

Therefore, approximately 68 scores fell between one standard deviation of the mean.

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Answer:

Step-by-step explanation:

A B or E

I also have trouble with this sry :(

a) No, a single spray of 10 grams of butter would not be enough to entirely cover the area of 4 slices of toast at 2 meters. The area of 4 slices of toast is larger than the area of 1 slice of toast, meaning that it would require more butter than 10 grams to cover the entire area.

b) A single spray of 10 grams of butter would be enough to cover the area of 8 slices of toast at 3 meters.

c) These changes would affect the amount of butter on each piece of toast in that there would be more butter on each piece with a larger rack and further distance from the "butter gun".

d) At 5 meters from the gun, our up-and-coming chef would be able to spray 16 slices of toast with a single burst of 10 grams of butter. Each piece of toast would also have more butter than it would if it was sprayed at a closer distance.

e) To duplicate the original single-slice toast at 5 meters from the gun, the chef would need to reduce the amount of butter being sprayed. He could do this by simply reducing the distance between the gun and the toast rack.

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Complete question :

A harried chef can't keep up with his breakfast orders and decides to automate the process with a "butter gun." The gun provides a 10 gram burst of butter spray with each hit of the trigger. He starts with a rack that holds one piece of toast 1 meter away. The demand again exceeds supply and he realizes he can use the same gun to produce more toast by placing a larger rack at a greater distance. He finds that a four-slice rack works at a distance of 2 meters. Pleased with profits he carries the idea a step further and puts a holder 3 meters away, maintaining a 10 gram spray. See figure below.a) If 1 spray entirely covers the area of a single slice at 1 meter, can it entirely cover the area of 4 slices at 2 meters? Why or why not?b) How many slices can one spray cover with a 3 meter arragnement?c) How do these changes affect the amount of butter on each piece of toastd) Our up-and-coming chef moves the fun back to 5 meters. Predict how much toast he can spray and how much better each piece gets.e) Explain how he could duplicate the original single-slice toast at 5 meters from the gun.

Answer:

11 years on Edg

Step-by-step explanation:

Answer:

11 years

Step-by-step explanation:

x - 4 = -12

I think x = -8 as if you decrease -8 by 4 it will leave us with the answer of -12

x = -8

Hope this helped,

Jon

Answer:

a=30°; b=40°;c=40°; d=40°; e=110°: f=110°; g=30°; h=140°; i=70°; j=70°

Answer:

21x+4

Step-by-step explanation:

X’s: 21x

#’s: 4

So it will be 21x+4

Answer:

\(\boxed{3x-5y}\)

Step-by-step explanation:

=> \(9x^2-25y^2\)

Let's factor it out

=> \((3x^2)-(5y)^2\)

Using Formula \(a^2-b^2 = (a+b)(a-b)\)

=> \((3x-5y)(3x+5y)\)

So, (3x-5y) is one of the factor of it!

Answer:

C

Step-by-step explanation:

Student 2 made an error with the distributive property.

Answer:

-2

Step-by-step explanation:

-6+x=-8

+6      +6

x=-2

DOUBLE CHECK

-6+(-2)=-8

-6-2=-8

True ✔

---

hope it helps

Answer:

B

Step-by-step explanation:

took test

Answer:

D. z = 2

Step-by-step explanation:

4z - 4.4 = 3.6  also means 4z = 3.6 + 4.4  which is 4z = 8

4 times 2 = 8

For proof do 4 times 2 minus 4.4 = 3.6

To determine a formula for the n-th term of an arithmetic sequence, we need to find the common difference (d) first.

The common difference is the constant value that is added or subtracted to each term to get to the next term.

In this case, we can find the common difference by subtracting the fourth term from the seventh term:

d = a₇ - a₄

d = 31 - 19

d = 12

Now that we have the common difference, we can use it to find the formula for the n-th term of the arithmetic sequence. The formula is given by:

aₙ = a₁ + (n - 1)d

In this formula, aₙ represents the n-th term, a₁ represents the first term, n represents the position of the term, and d represents the common difference.

Since we don't have the first term (a₁) given in the problem, we can find it by substituting the known values for a₄ and d:

a₄ = a₁ + (4 - 1)d

19 = a₁ + 3(12)

19 = a₁ + 36

a₁ = 19 - 36

a₁ = -17

Now we can substitute the values of a₁ and d into the formula to get the final formula for the n-th term:

aₙ = -17 + (n - 1)(12)

Therefore, the formula for the n-th term (aₙ) of the given arithmetic sequence is aₙ = -17 + 12(n - 1).

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The volume of the cone is approximately 533.3 cubic meters in terms of pi.

To find the volume of a cone, we can use the formula:

Where V is the volume, r is the radius of the base of the cone, h is the height of the cone, and pi is the mathematical constant approximately equal to 3.14.

In this case, r is 8 meters and h is 30 meters. Plugging these values into the formula, we get:

V = (1/3) * pi * 8^2 * 30

= (1/3) * pi * 64 * 30

= (1/3) * pi * 1920

= 640 * pi / 3

= 640 * 3.14 / 3

= 640 * 3.14 / 3

= 2023.04 / 3

= 533.3 cubic meters approximately .

So the volume of the cone is approximately 533.3 cubic meters in terms of pi.

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Answer: I'd say reflection

Answer:

It is a reflection

Step-by-step explanation:

In Geometry, a reflection is known as a flip. A reflection is a mirror image of the shape. An image will reflect through a line, known as the line of reflection. A figure is said to reflect the other figure, and then every point in a figure is equidistant from each corresponding point in another figure.

Let * be the binary operation on Z defined by a * b = a + 2b. To prove whether the set E of even integers is closed under the binary operation *, we need to show that for any two even integers a and b, their sum a + 2b is also an even integer.

Let a and b be two even integers, which means they can be written as a = 2m and b = 2n for some integers m and n. Then, the result of the binary operation * is:

a * b = a + 2b = 2m + 4n = 2(m + 2n)

Since m and 2n are both integers, their sum (m + 2n) is also an integer. Therefore, a * b can be written as 2 times an integer, which means it is an even integer.

Thus, we have shown that for any two even integers a and b, their binary operation * result a * b is also an even integer. Therefore, the set E of even integers is closed under the binary operation *.

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The answer is -1. Thus, it is equal to 360° - 675° = -315°.So, the values of six trigonometric functions of angle -675° are as follows: sin(-675°)

= sin(-315°)

= -sin(315°) =

-1/√2 ≈

-0.707cos(-675°) = cos(-315°)

= cos(315°)

= 1/√2

≈ 0.707tan(-675°)

= tan(-315°)

= -tan(45°)

= -1cot(-675°)

= cot(-315°)

= -cot(45°) = -1

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Answer:

i don't under stand the question

Step-by-step explanation:

Answer:

i think it is x=11,22 y= 21,42, then x=10,20 y=19,28, then x= 9,18 y=17,34,then x=7,14 y=13,26, then x=5,10 y=9,18

Step-by-step explanation:

Answer:

He thought he would sell 60 flags.

Step-by-step explanation:

Convert 20% in a decimal. That gives you .2, multiple that by 50 to get what 20% of 50 is. .20 multiplied by 50 is 10. Adding 50=10 gives you 60. So therefore, Liam thought he would sell 60 flags.

Answer: 60 flags.

Step-by-step explanation:

You take your 20% percent and divide by 100, giving you 0.2.

You then multiply 50 x 0.2, giving you 10.

You add the 10 to 50, giving you a total of 60 flags.

Answer:

Solution given;

total guest =225

She plans to serve 6 oz of pounds

we have

1 oz=0.0625 pounds

6oz=6*0.0625 =0.375 pounds

since

she serve 0.375 Pounds for each

225 guest needs =0.375*225=84.375 pounds

84.375 pounds of pasta will she need to order.

Answer:

shusidvxxosbsbzbz

Step-by-step explanation:

usjzkdofjfbf

Answer:

50 degree for X look at pic attached