someone please answer these 3 questions

Answer:

C

Step-by-step explanation:

Did it on Edge

Answer:

C

Step-by-step explanation:

Geometry E2020!! :3

(0,8)+(7,-52) eso es la problema

The function is concave up on the interval (-infinity, -sqrt(1/2)) U (sqrt(1/2), infinity).

The function f(x) = e^-x^2 is concave up when the second derivative is positive.

First, let's find the first derivative:
f'(x) = -2xe^-x^2

Next, let's find the second derivative:
f''(x) = (4x^2 - 2)e^-x^2

To find the interval where the function is concave up, we need to find when f''(x) > 0.

(4x^2 - 2)e^-x^2 > 0

4x^2 - 2 > 0

4x^2 > 2

x^2 > 1/2

x > sqrt(1/2) or x < -sqrt(1/2)

Therefore, the function is concave up on the interval (-infinity, -sqrt(1/2)) U (sqrt(1/2), infinity).

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Step-by-step explanation:

15 / (1/3)  is equal to  15 x 3/1  = 15 x 3 = 45

Answer 40

Step-by-step explanation:

20m

because d1xd2÷2 = 20

Answer:

(2x-5)feet

Step-by-step explanation:

The area of the rectangular garden A = Length × Width

Given the area A(x) = 2x² - 21x + 40

And the width =x-8 feet

To get the length, we will simply factorise the area function as shown;

You will just factorise the area

Factorizing 2x² - 21x+40

2x² − 21x + 40

2x² -16x - 5x + 40

2x(x - 8) -5(x - 8)

=(2x−5)(x−8)

Hence the length of the garden is

(2x-5)feet

Proportion should a 10% cream be mixed with a 7% cream to make an 8% cream the proportion in which the 10% cream should be mixed with the 7% cream to make an 8% cream is X:Y = 1:2.

To determine the proportion in which a 10% cream should be mixed with a 7% cream to make an 8% cream, we can use the concept of weighted averages. Let's assume we mix X parts of the 10% cream with Y parts of the 7% cream.

To find the ratio X:Y, we need to consider the percentages and their respective weights. The weight of each percentage is determined by the proportion in which it is present in the mixture.

The equation for the weighted average can be written as:

(Percentage A * Weight A) + (Percentage B * Weight B) = Desired Percentage * Total Weight

In this case, the equation would be:

(10% * X) + (7% * Y) = 8% * (X + Y)

Simplifying the equation, we get:

0.1X + 0.07Y = 0.08X + 0.08Y

Rearranging the terms, we have:

0.02X = 0.01Y

Dividing both sides by 0.01Y, we get:

0.02X / 0.01Y = 1

Simplifying further:

2X = Y

Therefore, the proportion in which the 10% cream should be mixed with the 7% cream to make an 8% cream is X:Y = 1:2.

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Answer: 24

Step-by-step explanation:

Answer:

Perimeter is 26.83.

Step-by-step explanation:

The length of the shorter side is \(\sqrt{2^{2} +4^{2} } =\sqrt{20}\).

The length of the shorter side is \(\sqrt{4^{2} +8^{2} } =\sqrt{80}.\)

So the perimeter is \(2\sqrt{20} +2\sqrt{80} =4\sqrt{5}+8\sqrt{5} =12\sqrt{5} =26.83\)

The typical method of solving this question... (School method)

The required value of the a, b, and c is 1, 18, and -3 respectively,

Given that,
The equation y=ax2+bx+c goes through the coordinates (-6, 15), (0, -3), and (2, 7). What are the values of a, b, and c is to be determined.

Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.

Here,
In the given expression put x = 0 and y = -3 as ordered pair (0, -3).
-3 = 0 + 0 + c
c = -3
Similarly,
Put other ordered pair in the given equation and c from above to evaluate a and b as 1 and 18 respectively.

Thus, the required value of the a, b, and c is 1, 18, and -3 respectively,

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Answer:

Step-by-step explanation:

The the terms be x and y

The sum of the terms = x+y

Difference of terms = x-y

Product of the sun and differences will be expressed as:

(x-y)(x+y) = x²-xy+xy-y²

(x-y)(x+y) = x²-y²

Hence the product of the terms is equivalent to the difference of two squares of the terms

Answer:

b

Step-by-step explanation:

Answer:

The answer is D or (10,-9)

Step-by-step explanation:

Since y is already given (and you have to use the substitution method) substitute y into one of the equations. So you should have something like this:

-2x+11=3x+21

After that merely solve for x which should get you x=10. After you get your x value plug 10 in either (of the original) equation and your y value should be -9. For example if you chose y=-2x+11 you should have y= -2(10)+11. In the end your answer should be (10,-9).

If you want to check your work merely plug your answer into both equations (ex: -9=-2(10)+11 --> -9=-9), therefore you know your answer is correct).

Hope this helped!

Answer:

answer it yourself

Step-by-step explanation:

Poisson Distribution along with Binomial Distribution is applied for Discrete Random variable.

What is discrete variable and example?

What is discrete and continuous random variable?

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Answer:

volume= 24 cm

Step-by-step explanation:

Hey there!

\(Answer:44\%\)

\(11\) out of \(25\) as a percentage:

\(11/25=0.44\)

\(100*0.44=44\)

\(44\%\)

\(\boxed{44\%}\)

Hope this helps!

\(\text{-TestedHyperr}\)

Answer:

44%

Step-by-step explanation:

first, divide 11 by 25! We get the answer 0.44! Then, multiply 100 by 0.44 to get the percentage! 0.44*100=44! Therefore, we get the answer 44%! If this helped, dont forget to rate and thank me!! If i really helped maybe even brainiest?! :0

Answer:

-8

Step-by-step explanation:

x+x+1= -15

2x+1=-15  (group the x's together)

2x= -14 (move the 1 to the right side)

x= -7

(-7)+(-8) = -15

-8 is the smaller integer

The required two consecutive integers are -7 and -8, where -7 > -8.

Given that,

The sum of two consecutive integers is -15, which equation could you use to find the two integers, and what is the smaller integer to be determined.

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,

Here,
let the number be x , and another number greater than x be x +1

Now,
Accoding to the question,
x + x + 1 = -15
2x + 1 = -15
2x = -16
x = -16 / 8
x = -8

Now,
Other number = x + 1 = -8 + 1 = -7

Thus, the required two consecutive integers are -7 and -8, where -7 > -8.

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The output obtained after executing the java code snippet,

public static void main(string[] args)

{

int value = 3;

value++;

system.out.println(value);
}

will be 4.

As per the question statement, we are provided with a java code snippet, which goes as:

public static void main(string[] args)

{

int value = 3;

value++;

system.out.println(value);
}

We are required to determine the output, that we will obtain on executing the above mentioned code.

That is, on executing the code

public static void main(string[] args)

{

int value = 3;

value++;

system.out.println(value);
}

We will obtain an output of 4, as "++" is the post increment function.

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The probability that a student, chosen at random, does not study Chemistry is 0.49.

What is Probability?

Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence. Using it, we can only make predictions about the likelihood of an event happening, or how likely it is.

From the Venn diagram -

The number of students that study biology and physics = 2

The number of students that study biology and chemistry = 6

The number of students that study chemistry and physics = 4

The number of students that study only physics = 5

The number of students that study only biology = 7

The number of students that study only chemistry = 8

The number of students that study all the subjects = 3

The number of students that study none = 6

So, the total number of students a = 2 + 6 + 4 + 5 + 7 + 8 + 3 + 6 = 41

The number of students that study chemistry = 8 + 6 + 3 + 4 = 21

The number of students that do not study chemistry b = 41 - 21 = 20 students

The probability chosen at random that child does not study chemistry =  b/a -

= 20/41

= 0.49

Therefore, the probability value is 0.49.

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Answer:

E

Step-by-step explanation:

i dont know at this point

Answer:

angle E

Step-by-step explanation:

Hello There!

We need to find an angle that is a pair with angle D and they have to be alternate interior angles

alternate interior angle properties:

In the image below; represents a pair of alternate interior angles

These properties match angle D with angle E

Why? they are both on the inside of the parallels

They also happen to be congruent

Answer:

4 months and 13 stamps

Step-by-step explanation:

Use a char, add two stamps each month for Joy and subtract 3 for Ronald.

Answer:

  85,999,999.999 999 909

Step-by-step explanation:

The expression represents the difference of a relatively large number and one that is relatively small. That difference is approximately the value of the large number. The exact value requires 17 digits for its proper expression. Most calculators and spreadsheets cannot display this many digits.

The numbers in standard form are ...

  86,000,000 = 8.6×10^7

  0.000000091 = 9.1×10^-8

Their difference is ...

  86,000,000 -0.000000091 = 85,999,999.999 999 909

In scientific notation, this is ...

  8.599 999 999 999 990 9×10^7

Answer:

x = 0

Step by step explanation:

g ( x ) = 2x + 3

If x = 0,

g ( 0 ) = 2 (0) + 3

or, g ( 0 ) = 3

Hope that helped :)

So, the percentage of data values represented on a box plot that falls between the lower quartile and the upper quartile is 50%.

In a box plot, the lower quartile (Q1) represents the 25th percentile, and the upper quartile (Q3) represents the 75th percentile. The interquartile range (IQR) is the range between the lower quartile and the upper quartile. To determine the percentage of data values that fall between the lower quartile and the upper quartile, we need to consider the IQR.

The IQR represents the middle 50% of the data. Therefore, the percentage of data values between the lower quartile and the upper quartile is 50%. In other words, half of the data values are within the IQR range, while the remaining 50% are outside this range, including the lower 25% below the lower quartile and the upper 25% above the upper quartile.

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The length and the width of the rectangle are 1cm and 8/3cm

The formula that is used to calculate the area of a rectangle is expressed with the equation;

A = lw

Given that the parameters are;

From the information given, we have that;

Length = 3w - 7

Substitute the values, we have;

40 = (3w - 7)w

expand the bracket

40 = 3w² - 7w

3w² - 7w - 40 = 0

3w² + 15w - 8w - 40 = 0

3w(w + 5) - 8(w + 5) = 0

w = 8/3 or - 5

Length = 3(8/3) - 7 = 1

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Dana needs to score 93 on the fourth examination to raise his average to 86.

To find out the score Dana needs on the fourth examination to raise his average to 86, we can use the concept of averages.

Let's denote the score Dana needs on the fourth examination as X. We know that he has taken three examinations and received scores of 82, 89, and To find the average, we sum up all the scores and divide by the number of examinations:

Average = (82 + 89 + 80 + X) / 4

We want this average to be 86. So we can set up the equation:

86 = (82 + 89 + 80 + X) / 4

To solve for X, we multiply both sides of the equation by 4:

4 * 86 = 82 + 89 + 80 + X

344 = 251 + X

Now, subtracting 251 from both sides:

344 - 251 = X

93 = X

Therefore, Dana needs to score 93 on the fourth examination to raise his average to 86.

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Answer:

x = 108°

y = 72°

z = 36°

Step-by-step explanation:

   If all sides are equal in a pentagon, then it is a regular pentagon.

n = the number of sides = 5

Sum of all angles in a pentagon = (n -2) * 180

                                                     = (5 - 2)* 180

                                                     = 3 *180

                                                     = 540°

Sum of each angle of regular pentagon = 540 ÷ 5

                                                                  = 108°

  \(\sf \boxed{\bf x= 108^\circ}\)

Linear pair: If the non common arm of adjacent angles form a straight line, then the adjacent angles are called linear pair and they add up to 180°

∠DCB + y = 180 °   {Linear pair}

  108  + y = 180

            y = 180 - 108

            \(\sf \boxed{\bf y = 72^\circ}\)

Exterior angle property of triangle: The exterior angle equals the sum of opposite interior angles.

In Δ BCF ,

  x = y + z

Now, substitute the values of x and y , and we can find the value of z.

      108° = 72 + z

108  - 72 = z

     \(\sf \boxed{\bf z = 36^\circ}\)

The required values are A = 1, B = 0, and C = 8 because the equation for the thrown ball's path will be x = 8.

Let the vertical line be the y-axis and the horizontal line be the x-axis, the ball is thrown from a place that is parallel to the y-axis (8,0).

Because the house is the starting point and the ball is thrown from a position 8 feet to the right of the house,

As a result, the equation for the thrown ball's path will be x = 8.

Therefore, A = 1, B = 0 and C = 8.

Hence, the required values are A = 1, B = 0, and C = 8 because the equation for the thrown ball's path will be x = 8.

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To calculate the equilibrium constant (K) for the reaction A(aq) → B(aq) at 75°C, we can use the relationship between the standard free energy change (∆G°) and the equilibrium constant:

∆G° = -RT ln(K)

Where R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin, and ln denotes the natural logarithm.

Given that the ∆G° values are 2.89 kJ at 25°C and 4.95 kJ at 45°C, we need to convert these values to Joules and convert the temperatures to Kelvin:

∆G°1 = 2.89 kJ = 2890 J

∆G°2 = 4.95 kJ = 4950 J

T1 = 25°C = 298 K

T2 = 45°C = 318 K

Now we can rearrange the equation to solve for K:

K = e^(-∆G°/RT)

Substituting the values, we have:

K1 = e^(-2890 J / (8.314 J/mol·K * 298 K))

K2 = e^(-4950 J / (8.314 J/mol·K * 318 K))

To find the value of K at 75°C, we need to calculate K3 using the same equation with T3 = 75°C = 348 K:

K3 = e^(-∆G°3 / (8.314 J/mol·K * 348 K))

The value of K3 can be determined by plugging in the calculated ∆G°3 into the equation.

Explanation:

The equilibrium constant (K) for a reaction relates the concentrations of the reactants and products at equilibrium. In this case, we are given the standard free energy change (∆G°) at two different temperatures and asked to calculate the equilibrium constant at a third temperature.

By using the relationship between ∆G° and K and rearranging the equation, we can determine the equilibrium constant at each temperature. The values of ∆G° are converted to Joules and the temperatures are converted to Kelvin to ensure consistent units.

The exponential function (e^x) is used to calculate the value of K, where x is the ratio of ∆G° and the product of the gas constant (R) and temperature (T).

By calculating K1 and K2 using the given data and then using the same equation to calculate K3 at the desired temperature, we can determine the equilibrium constant for the reaction at 75°C.
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Answer:

1 x 106

Step-by-step explanation:

200,000,000 divided by 200 is equal to 1,000,000

The exponential form of 10 * 10 is \(10^{2}\) . We get it from the prime factorization.

In order to get the exponential form of a number we have to write the prime factorization of that number. Prime factorization of the number is that number written as a product of prime numbers or as a product of powers of prime numbers. A basic exponential function from its definition is of the form f(x) = b x, where 'b' is a constant and 'x' is a variable. generally it refers to the positive valued function of a real variable. We can find the prime factorization of a number using factor trees, which are tools used to repeatedly break a number into products until all of the factors are prime numbers.

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