Please help will give brainlist answer ASAP no LINKS
The temperature was -7 degrees. It increased by 2 degrees per hour, What was the temperature after 6 hours. Write and solve an equation from this scenario.

Answer:

1/2

Step-by-step explanation:

3/8 + 1/8 = 4/8 = 1/2

Step-by-step explanation:

part A

c=3.14d

3.14*8

=25.12inches

circumference circle B

3.14*3

=9.42inches

part B area

A=3.14r^2

=3.14*4*4

=50.24inches^2

B

=3.14*1.5*1.5

=7.065inches^2

part c

the circumference area are larger for circles with bigger diameter or radius.

Answer:

2

Step-by-step explanation:

First let's find two clear points on this line. These points are shown by two black dots on the line.

Their coordinates are:

(0, -3) and (2, 1)

Now we want to use the slope formula: (y₂ - y₁) / (x₂ - x₁)

Plug in the coordinates we just found.

(1 - (-3)) / (2 - 0)

Simplify the parentheses.

= (1 + 3) / (2)

= (4) / (2)

Simplify the fraction.

4/2

= 2

This is your slope.

Hope this helps!

The value of the integral (9x + 9y) da over the region r is approximately 14.0625.

To evaluate the given integral using a transformation, we can use the concept of a double integral over a region in the xy-plane.

First, let's define the transformation T from the uv-plane to the xy-plane, where x = 9u and y = 9v. This transformation scales the coordinates by a factor of 9.

Next, let's find the Jacobian determinant of the transformation. The Jacobian determinant of T is given by the absolute value of the determinant of the matrix of partial derivatives of x and y with respect to u and v. In this case, the matrix is:

J(T) = |[∂x/∂u  ∂x/∂v]|
           |[∂y/∂u  ∂y/∂v]|

Taking the partial derivatives, we have:

∂x/∂u = 9   and   ∂x/∂v = 0
∂y/∂u = 0   and   ∂y/∂v = 9

Therefore, the Jacobian determinant is:

J(T) = |[9  0]|
           |[0  9]|

Taking the determinant, we have:

J(T) = (9)(9) - (0)(0) = 81

Now, we can evaluate the integral by transforming it into the uv-plane. The integral becomes:

∬(9x + 9y) dA = ∬(9(9u) + 9(9v))(J(T)) dA

Since x = 9u and y = 9v, we can substitute these expressions into the integral:

∬(9(9u) + 9(9v))(J(T)) dA = ∬(81u + 81v)(81) dA

Now, we need to find the limits of integration in the uv-plane. The region r in the xy-plane corresponds to a parallelogram in the uv-plane with vertices (-1/9, 2/9), (1/9, -2/9), (3/9, 0), and (1/9, 4/9).

Using these vertices, we can determine the limits of integration for u and v:

u ranges from -1/9 to 1/9
v ranges from 2/9 to 4/9

Therefore, the integral becomes:

∬(81u + 81v)(81) dA = ∫[u=-1/9 to 1/9] ∫[v=2/9 to 4/9] (81u + 81v)(81) dudv

Now, we can evaluate this double integral:

∫[u=-1/9 to 1/9] ∫[v=2/9 to 4/9] (81u + 81v)(81) dudv = (81)(81) ∫[u=-1/9 to 1/9] ∫[v=2/9 to 4/9] (u + v) dudv

Evaluating the inner integral with respect to u, we have:

(81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + vu [v=2/9 to 4/9] dv

Simplifying further, we get:

(81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (vu)(4/9 - 2/9) dv

Now, we can evaluate the inner integral with respect to v:

(81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (vu)(4/9 - 2/9) dv = (81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (vu)(2/9) dv

Simplifying further, we have:

(81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (2/9)u(2/9) dv

Now, we can evaluate the inner integral with respect to v:

(81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (2/9)u(2/9) dv = (81)(81) ∫[u=-1/9 to 1/9] (1/2)u^2 + (4/81)u^2 du

Combining like terms, we get:

(81)(81) ∫[u=-1/9 to 1/9] (1/2 + 4/81)u^2 du

Simplifying further, we have:

(81)(81) ∫[u=-1/9 to 1/9] (85/162)u^2 du

Now, we can evaluate the integral:

(81)(81) ∫[u=-1/9 to 1/9] (85/162)u^2 du = (81)(81)(85/162) ∫[u=-1/9 to 1/9] u^2 du

Integrating u^2 with respect to u, we get:

(81)(81)(85/162) ∫[u=-1/9 to 1/9] u^2 du = (81)(81)(85/162) [u^3/3] from -1/9 to 1/9

Plugging in the limits of integration, we have:

(81)(81)(85/162) [(1/9)^3/3 - (-1/9)^3/3]

Simplifying further, we get:

(81)(81)(85/162) [(1/729)/3 - (-1/729)/3] = (81)(81)(85/162) [2/729]/3

Now, we can simplify this expression:

(81)(81)(85/162) [2/729]/3 = (81)(81)(85/162) (2/729)(1/3)

Finally, evaluating this expression, we get:

(81)(81)(85/162) (2/729)(1/3) ≈ 14.0625

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Answer:

24 pizzas

Step-by-step explanation:

$1200/$50

The concave mirror should be placed at a distance of 2r from the wall to form a real image of the object on the wall. The magnification of the image is expressed using three significant figures is -0.500.

if the object is placed at a distance r in front of a concave mirror whose radius of curvature is also r, then the image is formed at the same distance r behind the mirror. This is a special case called the "center of curvature" configuration.

To form a real image on the wall, the mirror must be placed such that the object is beyond the mirror's focal point. The focal length of the mirror is half of its radius of curvature, so the focal length is f = r/2.

If the object is placed at a distance x from the mirror, then using the mirror equation:

1/f = 1/do + 1/di

where do is the distance of the object from the mirror and di is the distance of the image from the mirror. In this case, do = x and di = r, so we get:

1/r = 1/x - 1/f

Substituting f = r/2, we get:

1/r = 1/x - 2/r

Solving for x, we get:

x = 2r

Therefore, the mirror should be placed at a distance of 2r from the object to form a real image on the wall.

To find the magnification of the image, we use the magnification equation:

m = -di/do

where m is the magnification, di is the distance of the image from the mirror, and do is the distance of the object from the mirror. In this case, do = x = 2r and di = r, so we get:

m = -r/(2r) = -1/2

Therefore, the magnification of the image is -0.500.

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The keyspace for an affine cipher with a 40-letter alphabet would have size c. 640. Therefore, the answer is c. 640.

To understand why, let's first review what an affine cipher is. An affine cipher is a type of substitution cipher where each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. This fixed number is called the "shift" or "key" value. In an affine cipher, the shift value is multiplied by the plaintext letter's position in the alphabet, and then a second value (the "additive constant") is added to the result.

In an affine cipher with a 40-letter alphabet, there are 40 possible values for the shift and 40 possible values for the additive constant. Therefore, the total number of possible keys is the product of these two values: 40 x 40 = 1600.

However, not all of these 1600 keys will be valid. In particular, we need to ensure that the shift value is coprime with the size of the alphabet (i.e., there is no common factor between them other than 1). If the shift value is not coprime with the size of the alphabet, then some letters in the plaintext will map to the same letter in the ciphertext, which would weaken the security of the cipher.

In this case, the size of the alphabet is 40, and there are 16 numbers less than 40 that are coprime with 40: 1, 3, 7, 9, 11, 13, 17, 19, 21, 23, 27, 29, 31, 33, 37, and 39. For each of these 16 shift values, there are still 40 possible values for the additive constant, so the total number of valid keys is 16 x 40 = 640.

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The value of Y when X is 7 is -31.321, rounded to 4 decimal places.

The regression equation is a mathematical formula that describes the relationship between two variables, typically denoted as X and Y. To calculate the regression equation, we need a sample of observations for both X and Y. Once we have the sample, we can use statistical software or equations to estimate the coefficients of the equation.

In this case, we are given the regression equation as Y = -19.120 - 1.743X, rounded to 3 decimal places. This equation suggests that there is a negative relationship between X and Y, with Y decreasing by 1.743 units for every one-unit increase in X.

To determine the value of Y when X is 7, we simply substitute X = 7 into the equation and solve for Y:

Y = -19.120 - 1.743(7) = -31.321

Therefore, the value of Y when X is 7 is -31.321, rounded to 4 decimal places.

It is important to note that the regression equation is an estimate of the true relationship between X and Y, based on the sample of observations. The accuracy of the estimate depends on the size and representativeness of the sample, as well as the assumptions of the regression model.

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Answer:

19

Step-by-step explanation:

A' represents everything out A

B' represents everything out B

C' represents everything out C

So only the outside is left hope this helps

Answer:

These methods convert everything to radians

Step-by-step explanation:

Length of arc DC fromula is radius*angle in radians

Radius of the circle of DC is 8 cm aka the outer circle.

The angle inside is 130 degrees, in radians convert and multiply by 180/\(\pi\)

givong 130 degrees to be 13/18π

using formula, arc DC is 8*13/18π

=52/9π (in terms of pi) or 18.15 cm

or 130/360*(2π8)=18.15 (not using radians)

Length of arc QT regards the inner circle of radius 4 cm. Convert 130 degrees to radians. Using same formula as above, length of arc =4*13/18π

=26/9π or 9.08 cm

or 130/360*(2π4)=9.08 (not using radians)

Area of sector DEC suspended angle is 130 degrees of 13/18π radians. regarding large outer circle radius 8 cm.

Use formula 0.5*r^2*angle in radians fro area of sector gives:

0.5*8^2*13/18π

=208/9π or 72.61 cm^2

or 130/360*(π8^2)=72.61 (not using radians)

The area of sector QET angle 13/18πv rad and radius 4 cm using same forumla as above gives

0.5*13/18π*4^2

=52/9π or 18.15cm^2

or 130/360*(π4^2)=18.15 (not using radians)

Radian measure of angle DEC is 130 degrees again convert to radians by multiplying by π/180 gives

=13/18π

Radian measure of angle QET IS ALSO 130 degrees also

=13/18π

Answer:

Like a standard normal distribution (or z-distribution), the t-distribution has a mean of zero. The normal distribution assumes that the population standard deviation is known. The t-distribution does not make this assumption. The t-distribution is defined by the degrees of freedom.

Answer:  x=1

They all have 1 for their x coordinate; 'nuff said.

Answer:

Step-by-step explanation:

m ≥ 2-3

m ≥ -1   (graph this on  a number line)

Answer:

D) I think

Step-by-step explanation:

Answer: From the graph all the points are moving in tandem and shows a directly proportional relation between them . Hence, positive linear association best describe the scatter plot.

Step-by-step explanation:

half of room because worker A can paint fast so he will paint fast

Answer:

5/6 of the room would be painted if both of them painted the room together in 1 hour

Step-by-step explanation:

Work done by A in 1hour=1/2

Work done by B in 1hour=1/3

Therefore total work done by both in 1hr=1/2+1/3

LCM of 2 and 3 is 6

therefore 1/2+1/3=3/6+2/6=5/6

Answer:

The value of x is 138

Answer:

Step-by-step explanation:

2y = -3x - 4

y = -3/2x - 2

perp.:2/3

y - 0 = 2/3(x + 6)

y = 2/3x + 4

Answer:

Step-by-step explanation:

The common ratio between the triangles is 3 because StartFraction 18 Over 6 EndFraction = 3.

Answer:

Step-by-step explanation:

i think is c cause i took the test and quiz i got 100

The required solution for the given arithmetic problems are,
A) 2/5
B) 72 / 125
C) 6, 3/4, 12/5, and 3/10
D) 4, 1/6 and 6

A) 12/25 times 15/18.
Division of two fractions performed as multiplication of numerator of one fraction with a denominator of another function over a denominator of one function with a numerator of another function.
= 12 / 25  * 15 / 18 = 2 / 5

Similarly

b) 12/25 divided by 15/18.
= [12 / 25 ] / 15 / 18
= 12 / 25 * 18 / 15
= 72 / 125

C) 6 and 3/4 times 1 and 2/5
 6 * 1 = 6
3 / 4 * 1 = 3/4
6 * 2/5 = 12/5
3/4 * 2/5 = 3 / 10

D) 4 and 1/6 divided by 1 and 2/3.
= 4 / 1 = 4
= 1/6  / 1 = 1/6
= 4 / 2/3 = 6
= 1/6 / 2/3 = 1/4

Thus, the required solution for the given arithmetic problems is mentioned above.

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Answer:

Step-by-step explanation:

The product of a negative two and a positive three is equal to negative six (-6).

Answer:

The answer is -0.8.

Hope that helps. x

Step-by-step explanation:

Answer:

slope = - \(\frac{4}{5}\)

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \(\frac{y_{2}-y_{1} }{x_{2}-x_{1} }\)

with (x₁, y₁ ) = (3, 0 ) and (x₂, y₂ ) = (- 2, 4 )

m = \(\frac{4-0}{-2-3}\) = \(\frac{4}{-5}\) = - \(\frac{4}{5}\)

We are given the polynomial

Find the roots:

To find the roots of this polynomial, we want to solve the following equation

On the left side, we can factor the polynomial as follows

This leads to the following two equations

with solution x=0, and the equation

by subtracting -2 from both sides , we get

Finally, by dividing both sides by -7, we get

So, the roots of this polynomial are x=0 and x=2/7.

Describe the end behavior:

To describe the end behavior of a polynomial we should first see how the polynomial is written

In here, we see that we have a power of 4 and a power of 3. Consider that the power of 4, as x grows bigger and bigger (or smaller and smaller) the power of 4 will dominate the behavior of the polynomial as x⁴ grow bigger and bigger than x³. So, we can forget the other part and focus on the polynomial

Note that as x is a positive number, then x^4 is also a positive number. So as x grows bigger and bigger, we would get a more negative number, since we are multiplying -7 (a negative number) with a really big positive number (x^4). Then this polynomial will go to - infinity as x grows bigger and bigger.

Also, to understand the end behaviour, we should see how the polynomial behaves as x becomes a really negative number. As before, we can only focus on the polynomial

note that if x is a negative number, x^4 is again a positive number. So, as x becomes more negative (approaching - infinity) the number -7x^4 would once again be a negative number. So, the end behavior as x goes - infinity is also - infinity.

Sketch:

For the sketching, we will use a sketchin software, so the polynomial would look like this

An expression is just a mathematical phrase. A numerical expression contains numbers and operations. An algebraic expression is almost exactly the same except it also contains variables.

Answer:

Step-by-step explanation:

B

Answer:

Its would be A

Step-by-step explanation:

4 X 64=256

Hope this helped. If you check its simple math really! :))

The number of possible arrangements using Permutation is 725760

First, let's consider the seating arrangement of King Arthur, Sir Robin, and Sir Gallahad. Since Sir Robin must sit next to the king, we can treat them as a single entity. This means we have 10 entities to arrange: {King Arthur and Sir Robin (treated as one), Sir Gallahad, and the other 9 knights}.

The total number of arrangements of these 10 entities is (10 - 1)!, as we are arranging 10 distinct entities in a circle.

Next, within the entity of King Arthur and Sir Robin, there are 2 possible arrangements: King Arthur on the left and Sir Robin on the right, or Sir Robin on the left and King Arthur on the right.

Therefore, the total number of seating arrangements is (10 - 1)! × 2 = 9! × 2.

9! × 2 = 362,880 × 2 = 725,760

So, there are 725,760 possible seating arrangements that satisfy the given conditions.

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Answer:

12 or 14...

Step-by-step explanation:

I wouldn't really trust me but...

ALWAYS follow PEMDAS

3x2=6

1/4=1

New equation= -2(6+1^2)

6+1=7^2=14

now this part confused me -2(14)

Anybody else wanna solve that? lol

Answer:

I guess it is 43.57 Hope it helps!!!

Answer:

12

Step-by-step explanation:

i know that

The critical value for the 0.05 level of significance is k = 21.

To find the critical value, we can use the binomial distribution. The binomial distribution models the number of successes in n independent Bernoulli trials, each with probability p of success. In this case, the number of successes is the number of dog owners who say Woof Chow is their regular brand, and the number of trials is n = 100. The null hypothesis is that the true market share of Woof Chow is 25%, and the alternative hypothesis is that it is not 25%.

We can use the binomial cumulative distribution function (CDF) to find the critical value. The CDF gives the probability of getting k or fewer successes in n trials, given a probability of success p. The critical value is the smallest value of k such that the CDF at k is greater than or equal to 1 - alpha, where alpha is the level of significance. In this case, alpha = 0.05.

So, we want to find the smallest k such that:

P(X <= k) >= 1 - 0.05

where X is a random variable representing the number of dog owners who say Woof Chow is their regular brand. We can use a binomial calculator or a software package to calculate the binomial CDF, or we can use a table of critical values for the binomial distribution.

The critical value for the 0.05 level of significance is k = 21. This means that if the true market share of Woof Chow is 25%, then the probability of getting 23 or more dog owners who say Woof Chow is their regular brand is less than 0.05. Since the observed number of dog owners who say Woof Chow is their regular brand is 23, which is greater than 21, we can reject the null hypothesis that the true market share is 25%.

This means that based on the survey results, we cannot conclude that Woof Chow has a market share of 25%. The survey results suggest that Woof Chow may have a market share that is greater than 25%.

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