Whats 50x^3 - 23x +9
anegays this for my friends

Pr ( A & B ) , ie Probability (Senior Student with Statistics) = 0.15

Given : Event A = Student is senior, Event B = Student takes statistics

Pr (A & B) = Favourable Students / Total Students = 15 / 100

P = 0.15

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The statement is False

First understood what is correlation  & what is regression ?

Correlation :When measuring the relationship between two continuous variables, such as a dependent and independent variable or between two independent variables, correlation analysis is used.

Regression :Assessing the link between the outcome variable and one or more factors is referred to as regression analysis. Risk factors and co-founders are referred to as predictors or independent variables, whilst the result variable is known as the dependent or response variable. In a regression analysis, the dependent variable is represented by "y" and the independent variables are represented by "x."

Regression and correlation have some distinct differences.

The quantity and strength of the relationship between two variables is displayed through correlation. The data points are not connected by a fixed line. To determine how much one variable changes when the other stays constant, you compute a correlation. When r is zero, there is no relationship. One variable increases as the other does when r is positive. One variable rises while the other falls when r is negative.

While correlation does not match a line, linear regression identifies the optimal line that can predict y from x.

When measuring both variables, correlation is employed, whereas linear regression is typically used when manipulating the variable x.

Why the given statement is false ?

The statement is  False because correlation does not imply causation. This means if X and Y are correlated we cannot conclude if X is response or explanatory or Y is response or explanatory...hence no clearly identification of which is explanatory or response is needed

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Answer:

Step-by-step explanation:

rational

Answer:

Rational

Explanation:

18/42 is 4.258 which is a rational number

Answer:

7

Step-by-step explanation:

because 7x3 is 21 and 7x9 is 63

Answer:

m=2 :)

Step-by-step explanation:

8+7m+5=27

13+7m=27

27-13=14

7m=14

m=2

M=2

\(8 + 7m + 5 = 27\)

\(8 + 7m= 27 - 5\)

\(8 + 7m = 22 \)

\(7m = 22 - 8\)

\(7m = 14\)

\(14 \div 7m \\ = 2\)

Answer:

Train A

Step-by-step explanation:

Look at the table.

Train A : 75 - 50/ 3 - 2 = 25 mi/n

Train B : 40 - 0/ 2 - 0 = 20 mi/n

25  > 20

So it's train A.

{ RATE }

The cost to put a fence along the borders of the flower patch is $19.27

From the question, we have the following parameters that can be used in our computation:

Cost = $2.89 for a 27-inches section

Next, we calculate the perimeter of the patch by adding the side lengths

So, we have

Perimeter = 2 ft 3 in + 2 ft + 2 yd + 25 in + 3 ft 5 in

Evaluate

Perimeter = 15 feet 9 inches

Convert to inches

Perimeter = 180 inches + 9 inches

So, we have

Perimeter = 189 inches

Next, we have

Cost = 180 * 2.89/27

Evaluate

Cost = $19.27

Hence, the cost is $19.27

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Rounding to the nearest thousandth, the margin of error for this survey, expressed as a proportion, is approximately 0.020.

To calculate the margin of error for a survey, we can use the formula:

Margin of Error = Z × √((p × (1-p)) / n)

Where:

Z represents the z-score corresponding to the desired confidence level,

p represents the proportion of respondents who preferred candidate A,

n represents the sample size.

The sample size (n) is 1900, and the proportion of respondents who preferred candidate A is 1520/1900.

p = 1520/1900

≈ 0.8

We need to find the z-score corresponding to a 95% confidence level. For a 95% confidence level, the z-score is approximately 1.96.

Substituting the values into the formula:

Margin of Error = 1.96 × √((0.8 × (1-0.8)) / 1900)

Calculating the expression inside the square root:

(0.8 × (1-0.8)) ≈ 0.16

Margin of Error = 1.96 × √(0.16 / 1900)

Calculating the square root:

√(0.16 / 1900) ≈ 0.01016

Margin of Error = 1.96 × 0.01016

≈ 0.0199

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Answer: \(17.68cm\)

Step-by-step explanation:

Using the area formula of a cone, find the height first.

\(A=\pi r(r+\sqrt{h^2+r^2})\)

Solve for h,

Begin by dividing by \(\pi r\)

\(\frac{A}{\pi r}=r+\sqrt{h^2+r^2}\)

Subtract r.

\(\frac{A}{\pi r}-r=\sqrt{h^2+r^2}\)

Square both sides.

\((\frac{A}{\pi r}-r)^2=(\sqrt{h^2+r^2})^2\)

\((\frac{A}{\pi r}-r)^2=h^2+r^2\)

Subtract \(r^2\)

\((\frac{A}{\pi r}-r)^2-r^2=h^2\)

Extract the square root.

\(\sqrt{(\frac{A}{\pi r}-r)^2-r^2 } =\sqrt{h^2}\)

\(\sqrt{(\frac{A}{\pi r}-r)^2-r^2 } =h\)

Plug in your values.

\(\sqrt{[\frac{670cm^2}{(3.14)(8cm)}-(8cm)]^2-(8cm)^2 } =h\)

Solve;

\(\sqrt{[\frac{670cm^2}{25.12cm}-(8cm)]^2-(8cm)^2 } =h\)

\(\sqrt{[26.67cm-(8cm)]^2-(8cm)^2 } =h\)

\(\sqrt{(18.67cm)^2-(8cm)^2 } =h\)

\(\sqrt{348.57cm^2-64cm^2}=h\)

\(\sqrt{284.57cm^2}=h\)

\(15.77cm=h\)

------------------------------------------------------------------

Now, to find the slant height use this formula: \(l=\sqrt{h^2+r^2}\)

\(l=\sqrt{(15.77cm)^2+(8cm)^2}\\l=\sqrt{248.69cm^2+64cm^2}\\ l=\sqrt{312.69cm^2}\\ l=17.68cm\)

Answer: Approximately 8 minutes and 20 seconds

This is equivalent to 500 seconds.

==============================================

Explanation:

Any electromagnetic wave travels at the speed of light in a vacuum.

The speed of light is about 300,000 km per second.

time = distance/speed

time = (150,000,000 km)/(300,000 km per second)

time = 500 seconds

It takes about 500 seconds for an electromagnetic wave to go from the sun to the earth.

-----------

Divide by 60 to find the minutes and seconds

500/60 = 8 remainder 20

500 seconds = 8 minutes & 20 seconds

Answer:

8 options I think

Step-by-step explanation:

Answer:

77

Step-by-step explanation:

cats:dogs

2:5

2x11=22

5x11=55

55+22=77

Answer:

77 animals

Step-by-step explanation:

Ratio = 2:5

2 = 22

5 = 5/2 ×22

= 55

=>There are 55 dogs in the animal shelter

Therefore the total number of animals = 55 +22

= 77

=> There are 77 animals at the animal shelter

Answer:

Since <ABC ~= <DBE and <BAC ~= <BDE, the triangle s are similar by angle-angle.

The equation shows that value found in column #1 is less than the value found in column #2.

y = 2x² - 4x + 12

= -2(2x² + 2x) + 12

= -2(x² + 2x + 1) + 12

= -2(x + 1)² + 14

y = x² - 4x + 3

= (x² - 4x) + 4

= (x² - 4x + 4) + 3 - 4.

= (x - 2)² - 1

The vertex is (-1, 14) and (2, -1) for 1 and 2 respectively.

Therefore, the equation shows that value found in column #1 is less than the value found in column #2.

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Answer:

(2, 2), (5, 3), (9, 4), and (13, 5).

Step-by-step explanation:

The inverse of a function makes it so that the x-values become y-values, and y-values become x-values.

The current coordinates are (2, 2), (3, 5), (4, 9), and (5, 13).

If the function were inversed, the coordinates would be (2, 2), (5, 3), (9, 4), and (13, 5).

Hope this helps!

To know how much lemonade you can buy with $320, we first need to determine the price of a pint of ice cream. Since you can buy 80 pints with $320, the price of one pint of ice cream is $320 divided by 80, which equals $4.

Next, we need to find the price of a glass of lemonade, which is 3.2 times less than the price of ice cream. Therefore, the price of a glass of lemonade is $4 - (3.2 * $4) = $4 - $12.8 = -$8.8.

Since the price of lemonade is negative, it indicates that you will receive money back for every glass of lemonade you buy. However, since you cannot have a negative quantity of lemonade, the answer would be zero.

In summary, with $320, you can buy zero glasses of lemonade.

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The answer as a decimal to the nearest hundredth is -3.45.

For the given question;

The expression is given as;

= -3.7 + 1/4

Now, the fraction 1/4 can be written in decimal as 0.25.

Put the value of 1/4.

=  -3.7 + 0.25

The subtraction of larger negative to smaller positive gives negative number.

= -3.45

Thus, the answer as a decimal to the nearest hundredth is -3.45.

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Answer:

12

Step-by-step explanation:

B to C looks like your diameter so half of 24 is 12.

Answer:

Step-by-step explanation:

There are 10 cubes all together.

You want blue and then red with replacement.

Blue

P(B then red) = 3/10 * 4/10 = 12 / 100

12/100 reduces to 3/25

The answer is A

Answer:

A?

Step-by-step explanation:

On a Saturday afternoon, a family of five went to see a matinée movie. Everyone paid the same price for their movie tickets. The equation will be 57.50 = 5x + 25 and the value of x is $6.50.

Let the price of one movie ticket be x,

So if there are 5 members and the ticket price is same for all, the total price for 5 movie tickets = Price of one ticket × 5

= x × 5

= 5x

Money spent on drinks = $25

ow, the total money spent is $57.50

Total money spent = money spent on movie tickets + money spent on drinks

So, the equation will be:

57.50 = 5x + 25

Now, on solving the equation:

5x = 57.50 - 25

5x = 32.50

x = 32.50 / 5

x = 6.50

Hence, the price of one ticket is $6.50 and the equation for this question is 57.50 = 5x + 25.

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\(42.50\left(\frac{6}{10} \right)=\boxed{\$25.50}\)

Answer:

16.67% less

or

she only made 83% of her anticipated $18,000

Step-by-step explanation:

3000/18000 = 0.1666 or 16.67% less

15000/18000 = 0.8333 or 83%

Using a system of equations, it is found that the multiplication of the five numbers is of 16875.

A system of equations is when multiple variables are related in a context, and equations are built to find the values of each variable, according to the relations built in the problem.

For this problem, the variables are the numbers, given as follows:

x, y, z, w and t.

The sum of them is of 47, hence:

x + y + z + w + t = 47.

One of the numbers is a multiple of 9, and the other 4 are equal, hence:

4x + t = 47.

We are working with whole numbers, hence x cannot have decimal parts. Then, by trial and error, we test the multiples of 9 for t.

Hence the multiplication of the five numbers is:

27 x 5^4 = 16875.

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Answer:

-5°C

Step-by-step explanation:

Let T1 be the temperature at the start of the experiment.

We know, T1 = 10°C

Rate of decrease in temperature = 3°C per minute.

Total temperature decreased after 5 minutes (T2) = (3*5)°C

= 15°C

The final temperature (T) = T1 - T2 = 10°C - 15°C = -5°C

Answer:

Kalani will run 6.3 miles OR 6 3/10 miles.

Step-by-step explanation:

So first step that I would do is make it easier to understand by converting the fraction to a whole number. 2/3 hour= 40 minutes.

So Kalani runs 4 1/5 miles in 40 minutes.

Then, we convert 4 1/5 to 4.2. Next, I would divide 4.2 by 2 to get how long he ran in 20 minutes. 4.2/2=2.1.

The final step is to add 2.1 and 4.2 and we get 6.3.

Extra step:

But if we need to turn it back into a fraction, it would be 6 3/10

Hope this helps :)

Answer: Sara would earn  $478 for that week

Step-by-step explanation:

1. Sara's weekly salaries is $400, and she gets 6.5% on sales at her work.

2. In order to find how much she would get from the commission of $1200 worth of merchandise they sold, we need to find the 6.5% of 1200

Step 1: Our output value is 1200.

Step 2: We represent the unknown value with x.

Step 3: From step 1 above, 1200=100%.

Step 4: Similarly, x=6.5%.

Step 5: This results in a pair of simple equations:

1200=100%(1).

x=6.5%(2).

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both  equations have the same unit (%); we have

\(\frac{1200}{x} = \frac{100}{6.5}\)

Step 7: Again, the reciprocal of both sides gives

\(\frac{x}{1200} =\frac{6.5}{100}\)

⇒\(x=78\)

Therefore, 6.5% of $1200 is $78

3. you would then need to add 400 + 78 and you get a total of $478

Step-by-step explanation:

p=1/d

6=k/9

6×9=k

54=k

2=54/d

2×d=54

d=54/2

d=27

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