I need help please and thank you

Answer: the answer is i think* A, Translate the pre-image down 4 and right 3 and then reflect the figure over the x-axis.

Step-by-step explanation: it's the only one that makes sense im takin the test

Answer:

A, Translate the pre-image down 4 and right 3 and then reflect the figure over the x-axis.

Step-by-step explanation:

I took the test hope this helps!!!!!!!!!!!!!!

Answer:

A. Take 10% of $85

Step-by-step explanation:

Taking away 15% from $100 leaves you with $85 to take the second discount away from (10%)

Answer:

1/10(1 out of every 10)

Step-by-step explanation:

6/60 = 1/10

Answer:       equation = dA/dt = K₁ (M - A) - K₂A

Step-by-step explanation:

Let us follow this carefully to get our equation right.

From the question we are told to (Assume the constants of proportionality for the rate at which material is memorized and the rate at which material is forgotten are k1 > 0 and k2 > 0, respectively. Use A for A(t) ).

The Rate of memorizing the material is ∝ [Total amount to be memorized]  - [Amount memorized]

remember using A for A(t).

where A rep the amount memorized at a time t and M is the Total amount memorized.

so we have that dA/dt  ∝ M - A

which is dA/dt = K₁ (M - A) ---------------(*)

remember it was stated that forgetfulness is taken into account

Forgetfulness, F ∝ A

F = K₂A --------------- (**)

which implies the rate of memorization is decreased as a result of forgetting;

this leads to

dA/dt = K₁ (M - A) - K₂A

The  rate of differential equation is  ⇒  dA/dt = K₁ (M - A) - K₂A

cheers i hope this helped!!!!

Answer:

Check the explanation

Step-by-step explanation:

Let [tex]X_{i}[/tex] be the indicator random variable that takes the value 1 if the ith coin is the first coin in a sequence of 19 consecutive heads.

For any sequence of length 19, the starting coin can be from toss i ,

such that i is between 1 and n - 19+1

Thus the number of such sequences is

Kindly check the attached image below for the step by step explanation to the question above.

The functions that actually have period pi are:

B. y = csc x

C. y = sec x

Let's understand what the period of a function is all about.

Period of a function is known to be the distance that exists between the repetition of any function. In trigonometry, the length of a complete cycle is known as a period.

So, we can see that the functions that actually have period pi are y = csc x and y = sec x.

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Answer:

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

so you can think of it as b is 5 and 2 times by 5 is 10. you can then make 10 - 5 which is 5. so a is 5

Answer:

  23

Step-by-step explanation:

Maybe you want to evaluate ...

  f(x) = 3x^2 -2x +7

for x = -2.

Put the value of x where x is, then do the arithmetic.

  f(-2) = 3(-2)^2 -2(-2) +7 = 3(4) +4 +7

  f(-2) = 23

Answer:

C

Step-by-step explanation:

Postal code numbers are qualitative data because on these numbers, we can't perform any calculations.

The data are qualitative because they don't measure or count anything.

The correct option is C.

Information that cannot be quantified, tallied, or simply stated using numbers is referred to as qualitative data.

Given:

The postal codes of survey respondents.

Here, no numbers are given.

Data visualization technologies like word clouds, idea maps, graph databases, timelines, and infographics are used to communicate the information that is gathered from text, audio, and visual sources.

And the data can not be calculated.

Therefore, Postal code numbers are qualitative data.

To learn more about the  qualitative data;

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Answer:

Check the explanation

Step-by-step explanation:

Use the below R Code

Sales=c(245,138,352,322,228,275,560,366)

Advertising=c(16.5,18,22.3,17.4,19,20,32,18.6)

Commission=c(10.5,2,4,3.5,4.5,1.8,9,8.5)

data=as.data.frame(cbind(Sales,Advertising,Commission))

model1=lm(Sales~Advertising+Commission, data = data)

dat2=data.frame(Advertising=25,Commission=8)

predict(model1,dat2)

The predicted value of Sales for 25000 dollar on Advertising and 8% on Commission is 424685 dollars approximately (rounded to 0 decimal places)

Answer:

  D. 12 in²

Step-by-step explanation:

The area of a parallelogram is given by the formula ...

  A = bh

Substituting the given values for the length of the base (b) and the height (h), we have ...

  A = (4 in)(3 in)

  A = 12 in²

The area is 12 square inches.

Answer:

D 12

Step-by-step explanation:

I just did the lesson and got it right.

Step-by-step explanation:

12 ∫ (cot⁴(3x) csc²(3x)) dx

If u = cot(3x), then du = -3 csc²(3x) dx.  So -⅓ du = csc²(3x) dx.

12 ∫ u⁴ (-⅓ du)

-4 ∫ u⁴ du

-⅘ u⁵ + C

Substituting back:

-⅘ cot⁵(3x) + C

Evaluate between x=0 and x=π/12.  cot(0) is undefined, so the integral does not exist.

Answer:

12 ∫ (cot⁴(3x) csc²(3x)) dx

If u = cot(3x), then du = -3 csc²(3x) dx.  So -⅓ du = csc²(3x) dx.

12 ∫ u⁴ (-⅓ du)

-4 ∫ u⁴ du

-⅘ u⁵ + C

Substituting back:

-⅘ cot⁵(3x) + C

Evaluate between x=0 and x=π/12.  cot(0) is undefined, so the integral does not exist.

Step-by-step explanation:

The equation for water depth in the aquarium after evaporation is  y = 22 - 2c.

a. Equation: The equation approximating the depth y of water in the aquarium c weeks after filling it is y = 22 - 2c.

b. Depth after Two Weeks: Substitute c = 2 into the equation, y = 22 - 2(2) = 18 inches.

Answer:

The formula to find the sum of the first n terms of our sequence is n divided by 2 times the sum of twice the beginning term, a, and the product of d, the common difference, and n minus 1. The n stands for the number of terms we are adding together.

Answer:

conclusion one solution (-1 , 1)

Step-by-step explanation:

hello :

5x + 7y = 2 ...(*)

-2x + 7y = 9....(**)

by(*) and (**) calculate 7y

7y = 2-5x

7y = 9+2x

9+2x = 2-5x

2x+5x = 2-9

7x=-7   so : x= - 1

put this value in expression : 7y = 9+2x

7y = 9+2(-1)

7y =7

y =1

conclusion one solution (-1 , 1)

Answer:

242

Step-by-step explanation:

Answer:

14.14 units

Step-by-step explanation:

Klan Academy- I checked and it was correct.

Answer:

  P'(-6, -4)

Step-by-step explanation:

The (x, y) coordinates of the plotted point P are (-2, 2).

Putting those values into the translation formula, you get ...

  (x, y) ⇒ (x -4, y -6)

  (-2, 2) ⇒ (-2 -4, 2 -6) = (-6, -4)

The coordinates of the translated point P' are ...

  P'(-6, -4)

Answer:

3150^3

Step-by-step explanation:

Answer:

16 quarts

Step-by-step explanation:

16 quarts is bigger than 2 gallons because every 4 quarts equals 1 gallon.

Answer:

0.05

Step-by-step explanation:

Answer:

60. Got it wrong, but oh well.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Hello!

To study if the biomass of Gonyostomum semen can be controlled by grazing zooplankton species the research team examined the relationship between:

Y: Net grow rate of G. semen in a test tube.

X: Number of D. magna grazers introduced in test tubes.

Since they are testing the relationship between two variables, i.e. how one variable affects the other, the researchers made a linear regression analysis and estimated the slope of the regression:

The point estimate of the slope: b= -0.5286

Standard deviation of the slope: Sb= 0.1059

n= 6 test tubes.

a)

For the hypotheses:

H₀: β = 0

H₁: β ≠ 0

The formula for the t-statistic is:

b)

The statistic has n-2 degrees of freedom.

So in this case you are working with a Student's t with 6-2= 4 degrees of freedom.

c)

Considering a one-sided alternative hypothesis H₁: β > 0, the calculated value of the statistic under the null hypothesis doesn't change, what change is the direction and size of the rejection region. In item a, the hypotheses had a two-tailed rejection region, for this item the rejection region is one-tailed to the right. This means that you'll reject at hight values of the statistic. The p-value is also one-tailed and you'll find it in the right tail of the distribution (That's why it's positive):

P(t₄≥4.99)= 1 - P(t₄<4.99)

Looking at the t-table. For this distribution, the value of 4.99 is between the t values that accumulate P(t₄<4.604)= 0.995 and P(t₄<7.173)= 0.999 of probability, so it will be between:

1 - 0.995= 0.005

and

1 - 0.999= 0.001

Using the given table and considering the value is closer to 4.064 than 7.173, the p-value will be approximate:

0.00025 < P < 0.005

The p-value is less than the significance level, α: 0.05, so the decision is to reject the null hypothesis. You can conclude that the population slope is not negative (β > 0)

⇒There is not enough evidence to conclude that the population slope β is negative.

I hope you have a SUPER day!

The answers are: a) The t statistic is approximately -4.99. b)  the degrees of freedom are 4. c) There is strong evidence that the population slope β is negative.

(a) The t statistic for testing the null hypothesis H0: β = 0 is calculated using the formula:

t = (b - 0) / SEb

Where:

b = slope coefficient = -0.5286

SEb = standard error of the slope coefficient = 0.1059

Substitute the values into the formula:

t = (-0.5286 - 0) / 0.1059 ≈ -4.99

So, the t statistic is approximately -4.99.

(b) The degrees of freedom for the t statistic can be calculated using the formula:

df = n - 2

Where n is the number of data points, which is the number of observations (in this case, the number of Daphnia grazers), minus 2 for the two estimated coefficients (intercept and slope).

Given that there are 6 data points:

df = 6 - 2 = 4

So, the degrees of freedom are 4.

we see that the P-value falls between 0.001 and 0.0025. Therefore, we can approximate the P-value as:

0.001 < P < 0.0025

(c) Using α = 0.05 as the significance level, we compare the P-value to α. Since the P-value is less than α (0.0025 < 0.05), we reject the null hypothesis.

Therefore, the conclusion is: There is strong evidence that the population slope β is negative. In other words, based on the provided data and statistical analysis, it can be concluded that there is strong evidence that an increase in the number of Daphnia magna grazers is associated with a decrease in the net growth rate of Gonyostomum semen, indicating that the grazers are likely reducing the algal growth.

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Answer:

Conclusion

    The average rental rate in Hong Kong are higher than in Paris

Step-by-step explanation:

From the question we are told that

  The sample size for Hong Kong is  [tex]n_1 = 30[/tex]

  The mean for Hong Kong is [tex]\mu_h = 1,114 \ m^2[/tex]

   The standard deviation for Hong Kong is[tex]s = 230[/tex]

   The sample size for Paris is  [tex]n_2 = 40[/tex]

      The mean for Paris is [tex]\mu_p = 989 \ m^2[/tex]

    The standard deviation for Paris is [tex]s_p = 195[/tex]

      The level of significance is  [tex]\alpha = 0.05[/tex]

The Null Hypothesis is  

          [tex]H_o : \mu_1 - \mu_2 = 0[/tex]  

The alternative hypothesis is

          [tex]H_a: \mu_1 - \mu_2 >0[/tex]

The test statistics is mathematically represented as

          [tex]t = \frac{\mu _1 - \mu_2 - d }{\sqrt{(\frac{s^2}{n1} )+(\frac{(s_p^2}{n_2} )}}[/tex]

Substituting values

        [tex]t = \frac{1114 - 989 - 0 }{\sqrt{(\frac{230^2}{30} )+(\frac{(195^2}{40} )}}[/tex]  

       [tex]t = 2.399[/tex]

Since the value of the test statistics is higher than the  significance level then there  is enough evidence to conclude that the average rental rate in Hong Kong are higher than in Paris

Using the t-distribution, it is found that since the test statistic is more than the critical value, there is enough evidence to conclude that the mean annual lease rate is higher in Hong Kong than in Paris.

At the null hypothesis, it is tested if the average is not higher in Hong Kong, that is, the result of the subtraction if not greater than 0.

[tex]H_0: \mu_H - \mu_P \leq 0[/tex]

At the alternative hypothesis, it is tested if it is higher, that is:

[tex]H_1: \mu_H - \mu_P > 0[/tex]

The standard errors for both samples are:

[tex]s_H = \frac{230}{\sqrt{30}} = 42[/tex]

[tex]s_P = \frac{195}{\sqrt{40}} = 30.83[/tex]

The distribution of the differences has mean and standard deviation given by:

[tex]\overline{X} = \mu_H - \mu_P = 1114 - 989 = 125[/tex]

[tex]s = \sqrt{s_H^2 + s_P^2} = \sqrt{42^2 + 30.83^2} = 52.1[/tex]

The test statistic is:

[tex]t = \frac{\overline{X} - \mu}{s}[/tex]

In which [tex]\mu = 0[/tex] is the value tested at the null hypothesis.

Hence, the value is:

[tex]t = \frac{125 - 0}{52.1}[/tex]

[tex]t = 2.4[/tex]

The critical value, for a right-tailed test, as we are testing if the mean is greater than a value, with a significance level of 0.05 and 30 + 40 - 2 = 68 df, is [tex]t^{\ast} = 1.67[/tex]

Since the test statistic is more than the critical value, there is enough evidence to conclude that the mean annual lease rate is higher in Hong Kong than in Paris.

A similar problem is given at https://brainly.com/question/16402495

Answer:

as a mixed number: 300 1/2 (reduced or equivalent)

as a decimal: 300.5 (reduced or equivalent)

as a percentage: 30,050% (reduced or equivalent)

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

im smart

Answer:

25 hours

Step-by-step explanation:

30 times 5 is 150 and 5 times 5=25

Answer:

1/2 x 1/4=1/8

Step-by-step explanation:

Answer:

Joe saved 68.25

Step-by-step explanation:

Subtract 6.85 from 80, you get 73.15

Subtract 5.50 from 73.15 and you get 67.65.

Subtract 21.40 from 67.65 and you get 46.25.

Add 22 to that amount, you get 68.25.

P.S

Have an Amazing Day! I Hope this Helps and Good Luck!!

~Faker/Tosrel

Answer:

16x + 25

Step-by-step explanation:

First, distribute the 8 to both numbers within the parenthesis.

1 + 16x + 24

Then, add similar terms together.

16x + 25

Final answer:

To simplify the expression 1 + 8(2x + 3), distribute the 8 across the terms inside the parentheses, leading to the equivalent expression 16x + 25 that is option C is correct.

Explanation:

To simplify 1 + 8(2x + 3), we distribute the 8:

1 + 8(2x) + 8(3)

1 + 16x + 24

16x + 25

Answer:

Which equation could you use to solve the problem?  

✔ g + 20.7 = 50.5

What should you do to each side of the equation to isolate the variable?  

✔ Subtract 20.7 from each side.

What is the solution of the equation?  

✔ 29.8

Step-by-step explanation:

An equation that could be used to solve this word problem is 20.7 + x = 50.5.

An equation can be defined as a mathematical expression which shows that two (2) or more thing are equal.

In order to solve this word problem, we would assign a variable (x) to the unknown number and then translate the word problem into algebraic equation as follows:

20.7 + x = 50.5

Subtract 20.7 from each side:

20.7 - 20.7 + x = 50.5 - 20.7

x = 50.5 - 20.7

x = 29.8.

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