Enfaite je ne comprend pas cet exercice qui peut m'aider c'est deja la rentré et je galère merci de bien vouloir m'aider

We want to get a quadratic equation by knowing its tangent line at a point. Remember that the tangent line is given by the derivative of the equation.

We will find that the parabola is:

y = 3*x^2  - 4*x

We start with the tangent line:

y₂ = 8*x - 12

The slope of this tangent line is equal to the derivative of our parabola evaluated in x = 2.

Our parabola is y = a*x^2 + b*x

Derivating we get:

y' = 2*a*x + b

Then we have:

2*a*2 + b = 8

And we also know that our parabola passes through the point (2, 4), then we must have:

4 = a*2^2 + b*2

Then we have a system of equations:

2*a*2 + b = 8

4 = a*2^2 + b*2

First we can simplify the equations:

4*a + b = 8

4 = 4*a + 2*b

We can isolate 4*a in the first equation to get:

4*a = 8 - b

Now we can replace it in the second equation:

4 = (8 - b) +  2*b

4 = 8 + b

4 - 8 = b

-4 = b

Now that we know the value of b, we can use

4*a  = 8 - b

4*a = 8 + 4 = 12

a = 12/4 = 3

Then the equation of the parabola is:

y = 3*x^2  - 4*x

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Answer:

The required function -  [tex]g(x)=\frac{1}{2}(3)^{-x}[/tex]

Step-by-step explanation:

Given : Function represents g(x), a reflection of [tex]f(x) =\frac{1}{2}(3)^x[/tex] across the y-axis

To find : Which function represents the g(x)?

Solution :

The function [tex]f(x) =\frac{1}{2}(3)^x[/tex]

The function f(x) reflected across y-axis to form g(x)

The reflection of the point (x,y) across  the y-axis is the point (-x,y).

f(x,y)→f(-x,y) , the graph of f(x) is reflected across y-axis.

Let [tex]y=\frac{1}{2}(3)^x[/tex]

After reflection across y-axis is

[tex]g(x)=\frac{1}{2}(3)^{-x}[/tex]

The required function.

Refer the attached graph below.

Answer: 81 children and 92 adults

Step-by-step explanation:

To solve the exercise, check the data we have from the question:

Total people: 173

Adult tickets price: $5

Children tickets price: $3

Total revenue: $703

We need to know how many of each kind of ticket were sold. To do so, we can show the data as two equations:

Equation 1:

[tex]TotalRevenue = Adults*5 + Children*3[/tex]

[tex]703=5a+3c[/tex]

Equation 2:

[tex]a+c=173[/tex]

Where a represents adults who attended the event and c represents children who attended the event. We can replace one of the unknown quantities following:

[tex]a=173-c[/tex]

[tex]703=5(173-c)+3c[/tex]

Solving:

[tex]703=865-5c+3c[/tex]

[tex]5c-3c=865-703[/tex]

[tex]2c=162[/tex]

[tex]c=81[/tex]

Then, we replace c on equation 2:

[tex]a=173-81[/tex]

[tex]a=92[/tex]

The probability of getting the king of spades as the top card and the bottom card of a shuffled deck depends on whether the cards are picked with or without replacement.

The probability of getting the king of spades as the top card and the bottom card of a shuffled deck depends on whether the cards are picked with or without replacement. If the cards are picked without replacement, the probability will be different than if they are picked with replacement.

If the cards are picked without replacement, the probability of getting the king of spades as the top card is 1/52. This is because there is only one king of spades in a deck of 52 cards. After the king of spades is picked as the top card, there are 51 cards left in the deck. The probability of getting the king of spades as the bottom card is also 1/51 because there is only one king of spades left in the deck.

If the cards are picked with replacement, the probability of getting the king of spades as the top card is still 1/52, but the probability of getting the king of spades as the bottom card is also 1/52. This is because each card is put back into the deck and reshuffled before the next card is picked, so the probabilities for each card remain the same.

Answer: D.)The slope is Negative three-halves and contains the point (0, −2).

Step-by-step explanation:

i got it correct obviously oncrip

Answer:

standard deviation=4.47

Step-by-step explanation:

We have to find the standard deviation of the data set:

13   17    9  21

Now we calculate the mean of the data .

We know that mean is the average of the data values and is calculated as:

[tex]Mean=\dfrac{13+17+9+21}{4}\\ \\Mean=\dfrac{60}{4}\\\\Mean=15[/tex]

Now we find the difference of each data point from the mean as:

Deviation:

13-15=-2

17-15=2

9-15=-6

21-15=6

Now we have to square the above deviations we obtain:

4   4   36   36

now we calculate the mean of the above sets:

[tex]variance=\dfrac{4+4+36+36}{4}\\ \\Variance=\dfrac{80}{4}\\\\Variance=20[/tex]

now standard deviation is the positive square root of variance

so, standard deviation=√(20)=4.47

Final answer:

To find the standard deviation for Omar's work hours, we first calculate the mean of the data, then compute the squared differences from the mean, sum these, divide by the sample size minus one, and take the square root of this result, which is approximately 5.16 hours.

Explanation:

To calculate the standard deviation for Omar's recorded work hours: 13, 17, 9, 21, we follow these steps:

First find the mean (average) of the sample. Mean = (13 + 17 + 9 + 21) / 4 = 60 / 4 = 15 hours.

Next, subtract the mean from each data point and square the result:[tex](13-15)^2[/tex] = 4,[tex](17-15)^2[/tex] = 4, [tex](9-15)^2[/tex]= 36,[tex](21-15)^2[/tex] = 36.

Now, find the sum of these squared differences: 4 + 4 + 36 + 36 = 80.

Since this is a sample (not the full population), we divide by the sample size minus 1, which is 3: 80 / 3 ≈ 26.67.

Finally, take the square root of this quotient to find the standard deviation: √26.67 ≈ 5.16 hours.

Therefore, the standard deviation for the data is roughly 5.16 hours.

Answer:

9.65×10¹⁴

Step-by-step explanation:

The 9 of 9.65 has been moved 14 places to the left to get to its position in 965,000,000,000,000. That is, its value has been multiplied by 10¹⁴.

_____

If you were to write 965,000,000,000,000 in expanded form, you would write it as ...

... 9×10¹⁴ +6×10¹³ +5×10¹² +0×10¹¹ +... +0×10⁰ = 9.65×10¹⁴

The first term of this sum is a clue as to how the number is written in scientific notation,

the answer is 9.65×10¹⁴

The value of m is 36

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" symbol and terms on both sides must always be present when writing an equation. Equal treatment should be given to each party. Multiple terms, operators, and variables are not required on each side of an equation.

Given:

1/3m+3−5/6m=−15

Subtract 3 from both sides

1/3m +3 -5m/6 -3= -15-3

Simplify

1/3 m -5m /6 = -18

Now, multiply the LCM

-3m = -108

Divide both side by (-3)

-3m/(-3)= -108/ (-3)

m= 36.

Hence, the value of m is 36.

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the answer (B) thank me later ;)

Final answer:

To determine the quantity of chocolate chips needed for a recipe that calls for one and one quarter times as much sugar as chocolate chips, set up a proportion using the given sugar amount. Multiply the sugar quantity (1⅓ cups) by the reciprocal of the ratio (4/5), which results in 1⅓ cups of chocolate chips needed.

Explanation:

To determine the quantity of chocolate chips needed when the recipe asks for one and one quarter times as much sugar as chocolate chips, we can use a simple proportion based on the quantity of sugar used. The recipe specifies that 1⅔ cups of sugar are used, which is equivalent to ⅓ cups of sugar when converted to an improper fraction.

The proportion would look like this: Chocolate Chips (C) is to 1 as 1⅓ cups of sugar is to 1⅔, which can be set up as a ratio: C/1 = (1⅓)/(1⅔). To solve for C, we multiply both sides by 1 to get rid of the denominator for C, giving us:

C = (1⅓)/(1⅔)

Now, let's solve the equation:

Convert 1⅓ to an improper fraction: 5/3.

Convert 1⅔ to an improper fraction: 5/4.

Divide 5/3 by 5/4 to find the quantity of chocolate chips: (5/3) × (4/5) = 20/15 = 4/3, which simplifies to 1⅓ cups.

Therefore, you would need 1⅓ cups of chocolate chips for the recipe.