A number, twice that number, and one-third of that number are added. The result is 20. What is the number?

Answers

Answer 1
Answer: The answer is 6 because 6+12+2=20. I hope that was helpful. :)

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Given f(x)=x+5 all over 3, solve for f^-1(3) (A. -1; B. 14; C. 18; D. 21)

Answers


f^-1 means finverse
find finverse then subsitute 3 for x
to solve

replace f(x) with y
solve for x
switch x with y
replace y with finverse or f^-1

f(x)=(x+5)/3
y=(x+5)/3
3y=x+5
3y-5=x
3x-5=y
finvers=3x-5

fiinverse(3)=3(3)-5
finverse(3)=9-5
finverse(3)=4
why is it not listed again

Suppose an infection spreads according to the following data.What type of regression line is the best fit for this data?
A) linear
B) power
C) exponential
D) linear and exponential

Answers

Answer-

Exponential regression line is the best fit for the data.

Solution-

Taking

x = input variable,

y = output variable.

Taking the data from the table, regression models were generated using Excel.

As shown in the attachments, the co-efficient of determination (R²) is maximum for Exponential Regression model or more closer to 1.

As,

0.904<0.957<0.974

R^2_{\text{Linear}}<R^2_{\text{Power}}<R^2_{\text{Exponential}}

The more closer the value of R² to 1, the better the regression model and the best fit line is.

In general also, when we consider growth or decay, we follow the exponential function approach.

Therefore, the exponential regression models should be followed and so exponential regression line is the best fit for the data.


This is exponential and linear. Hope this helps!

Please help me out with this

Answers

y - y1 = m (x + x1)

Solve for m bgg subtracting the y's and dividing them by the difference of the 2 x's.

-31 - 35 = -66
-6 - 5 = -11

Divide the two to get 6.

Use the first point (as instructed) and plug it into the equation.

y - 35 = 6 (x - 5)

y + [-35] = [6] (x + [-5])

The brackets are the fill in the blanks.

What percentage of the audience from the 16-25 age group gave the movie a poor rating?

Answers

Select one of the options below as your answer:

A. 6.19%

B. 10.00%

C. 25.34%

D. 15.70%

E. 16.22%
How many people all together is there ?

How far from zero would you move on the x-axis to reach the point (10,8)

Answers

Answer:

You would move 10 units to the right from zero on the x-axis

Answer:

10 spaces to the right to get to 10 and up 8 to get to 8

The graph shows the results of a survey that asked 4300 students ages 7 to 18 what they thought would be the most important benefit of air travel in the future. There are about 40 million students in the United States. If the margin of error is ±3%, what is the range of the number of students ages 7 to 18 who would likely say that "finding new resources for Earth" is the most important benefit of future flight?

Answers

Answer:

What class you be taking

Step-by-step explanation:

To calculate the range of the number of students ages 7 to 18 who would likely say that "finding new resources for Earth" is the most important benefit of future flight, we need to consider the margin of error.

The margin of error (MOE) is ±3%, which means the actual percentage of students who think this way could be 3% higher or 3% lower than the survey result.

First, let's find out the percentage of students who chose "finding new resources for Earth" as the most important benefit of future flight based on the survey:

Percentage from the survey = \( \frac{4300}{40000000} \times 100\% = 0.01075\% \)

Now, we need to calculate the upper and lower bounds considering the margin of error:

Upper bound = \( 0.01075\% + 3\% = 0.04075\% \)

Lower bound = \( 0.01075\% - 3\% = -0.01925\% \)

The lower bound cannot be negative, so we consider it as 0%.

To find the number of students in the United States who would likely say that "finding new resources for Earth" is the most important benefit of future flight, we use the upper bound percentage:

\( 0.04075\% \times 40000000 = 16300 \)

So, the range is approximately 16,300 students to 4,300 students.