I need help with #65 to #70 ASAP please and thank you …. Could someone please help me with it… I need to get it done ASAP… it is passed due

\(given \: \: a=2,b=-3,c=1,d=-2 \\ then \: \: d + 2c - (3a - 2b) \\ = ( - 2) + 2(1) - (3 \times 2 - 2 \times -3) \\ = - 2 + 2 - (6 + 6) \\ = 0 - 12 \\ = - 12\)

-12

ray4918 here to help..

Gracias!!

Answer: 22( w + 2 ) =77 and the amount of the water bottle would be 1.50

Step-by-step explanation: i dont know what to write??

The predicted number of adults in Oak City whose main source of news is newspapers or the radio is 85

To predict the number of adults in Oak City whose main source of news is newspapers or the radio, we need to add the number of adults who answered "Newspapers" to the number of adults who answered "Radio".

According to the sample data

Number of adults who answered "Newspapers": 64

Number of adults who answered "Radio": 21

Therefore, the predicted number of adults in Oak City whose main source of news is newspapers or the radio we have to use the addition

64 + 21 = 85

Rounding this answer to the nearest whole number, we get

85 ≈ 85

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The given question is incomplete, the complete question is:

There are 44,000 adults living in Oak City. In examining attitudes toward the news, a research group asked a random sample of Oak City adults "What is your main source of news?" The results are shown below. Main Source of News Newspapers Number of Adults 64 Internet 80 Television 126 Radio 21 Other 40 Based on the sample, predict the number of adults in Oak City whose main source of news is newspapers or the radio. Round your answer to the nearest whole number.

The limit lim (x→∞) 2x is undefined.(a) To evaluate the limit:lim (x→-4) (x + 2)²

         (2 - x)²

We can directly substitute x = -4 into the expression since it does not result in an indeterminate form.

Substituting x = -4:

lim (x→-4) (x + 2)² = (-4 + 2)² = (-2)² = 4

         (2 - x)²         (2 - (-4))²         (2 + 4)²         (6)²         36

Therefore, the limit lim (x→-4) (x + 2)² / (2 - x)² is equal to 36.

(b) To evaluate the limit:

lim (x→∞) 2x

This is a straightforward interval limit that can be evaluated by direct substitution.

Substituting x = ∞:

lim (x→∞) 2x = 2∞

Since ∞ represents infinity, the limit is undefined.

Therefore, the limit lim (x→∞) 2x is undefined.

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Answer: 20 cubic feet

Step-by-step explanation:

I did the math

Hope this helps!!

Answer:

918

Step-by-step explanation:

Answer: The length is 7/10 inches.

Step-by-step explanation:

So if is says that the string is  1/10 times 7 inches long, then it represents the length of the string.

So  L = \(\frac{1}{10}*7\)  

     L = 7/10

Answer:

l=7/10

Step-by-step explanation:

The time it would take for light to travel from Earth to the moon is; 1.28 seconds.

It follows from the task content that the time it would take for light to travel from Earth to the Moon is to be determined.

Since the given speed of light is; 3 × 10⁵ km/s and the distance is; 3.84 × 10⁵ km.

It follows from the formula;

Speed = Distance / Time

Time = Distance/Speed

Time = 3.84 × 10⁵ / 3 × 3.10⁵

Time = 1.28 seconds.

Therefore, the required time it would take to travel from Earth to the moon is; 1.28 seconds.

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Answer:

-11 F

Step-by-step explanation:

So we need to just add or decrease the temperature.

-5 + 14

9 - 20

-11

Answer:

-5 + 14 = 9

9 - 20 = -11

the answer is -11°f

A bar chart or box plot would be the most appropriate graphical representation to display the given data. The correct option is A.

The best graphical representation to display the given data would be a bar chart, also known as a bar graph.

A bar chart is a graph that represents categorical data with rectangular bars, where the height or length of each bar corresponds to the frequency or relative frequency of the category. In this case, the categories are the types of items purchased (Health & Medicine, Beauty, Household, and Grocery), and the frequency is the number of purchases in each category.

A box plot would not be appropriate for this data because it is not numerical data and cannot be separated into quartiles or percentiles. A line plot would also not be appropriate because it is used to display individual data points rather than grouped data.

A histogram would not be appropriate because it is used to display continuous numerical data rather than categorical data. A stem-and-leaf plot would not be appropriate because it is also used to display numerical data.

Therefore, a bar chart would be the most appropriate graphical representation to display the given data.

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Answer: B

Step-by-step explanation: didn’t do it

Answer:

60 cents

Step-by-step explanation:

hhgfghgfgucixoszfup

Answer:

The answer is D. $1.60

Step-by-step explanation:

4 quarters equal $1.00

2 dimes equal .20 (or 20 cents)

6 nickels equal .30 (or 30 cents)

and 10 pennies equal .10 (or 10 cents)

when you add all of this together, you get $1.60 in total, i hope this helps (:

The claim that a drug is effective at 1% is not sufficiently supported by the available data.

Participant 1 2 3 4 5 6

Before 185 220 190 158 227 211

After 175 215 195 155 230 207

Difference = Before - After = 10 5 -5 3  -3 4

Participant 7 8 9 10 11 12

Before 260 156 201 300 180 270

After 258 159 201 290 172 272

Difference = Before - After = 2 -3 0 10  8 -2

Participant 13 14 15 16 17 18

Before 293 183 205 151 291 166

After 290 185 200 146 287 166

Difference = Before - After = -7 -2 5 5  4 0

Hypothesis :

H0 : μd = 0

H0 : μd ≠ 0

10+5-5+3-3+4+2-3+10+8-2+3-2+5+5+4+0 = 44

The mean of d, \(d`\) = Σd / n = 44 / 18 = 2.44

The standard deviation, S.d = 4.45 (using calculator)

The test statistic, T : \(d`\) / (S.d/√n)

T = 2.44 / (4.45/√18)

T = 2.44 / 1.0488750

T = 2.326

Degree of freedom, df = n - 1 ; 18 - 1 = 17

P value = 0.0326

α = 0.01

Since P value < α ; we fail to reject H0

So the claim that a drug is effective at 1% is not sufficiently supported by the available data.

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The equations of the tangent plane and the normal line to the surface defined by 2(x - 3)^2 + (y - 9)^2 + (z - 7)^2 = 10 at the point (4, 11, 9) are:

a) The equation of the tangent plane is 4(x - 3) + 2(y - 9) + 2(z - 7) = 0.

b) The equation of the normal line is x(t) = 4 + 2t, y(t) = 11 - t, and z(t) = 9 + t.

To find the equation of the tangent plane at the given point, we first need to take the partial derivatives of the surface equation with respect to x, y, and z.

∂/∂x(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2) = 4(x - 3)

∂/∂y(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2) = 2(y - 9)

∂/∂z(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2) = 2(z - 7)

Then, we evaluate these partial derivatives at the point (4, 11, 9):

∂/∂x(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2)|(4,11,9) = 4(4 - 3) = 4

∂/∂y(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2)|(4,11,9) = 2(11 - 9) = 2

∂/∂z(2(x - 3)^2 + (y - 9)^2 + (z - 7)^2)|_(4,11,9) = 2(9 - 7) = 4

Using these values, we can write the equation of the tangent plane in point-normal form:

4(x - 4) + 2(y - 11) + 4(z - 9) = 0

Simplifying, we get:

4(x - 3) + 2(y - 9) + 2(z - 7) = 0

To find the equation of the normal line, we use the fact that the direction of the normal vector to the surface is given by the gradient of the surface equation at the point of interest. So, the direction vector of the normal line is:

∇f(4, 11, 9) = ⟨4, 2, 4⟩

We can use this vector and the point (4, 11, 9) to write the equation of the normal line in vector form:

r(t) = ⟨4, 11, 9⟩ + t⟨4, 2, 4⟩

Expanding this, we get:

x(t) = 4 + 4t

y(t) = 11 + 2t

z(t) = 9 + 4t

Alternatively, we can write the equation of the normal line in parametric form:

x(t) = 4 + 2t

y(t) = 11 - t

z(t) = 9 + t

Both of these forms give the same line, but the parametric form is simpler and easier.

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The correct answer is A, E and F. The data sets show that the number of videos streamed this week is less consistent and lower than the number of videos streamed last week.

Data sets are collections of data that are organized and structured for analysis and reporting. They are typically composed of multiple variables which are organized in rows and columns.

A is correct because the Interquartile Range (IQR) for this week is greater than the IQR for last week. This indicates that the number of videos streamed this week was less consistent than last week.

E is correct because the median for this week is less than the median for last week. This means that the typical number of videos streamed this week is less than the number streamed last week.

F is correct because the IQR for this week is the same as the IQR for last week. This shows that the number of videos streamed this week was as consistent as last week.

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Let the smaller polygon have side lengths a and the larger polygon have side lengths b. Since the polygons are similar, the ratio of corresponding side lengths is the same as the ratio of their areas. That is:

b^2 / a^2 = 128 / 98

Simplifying this expression, we get:

b / a = √(128 / 98) = √(64 / 49) = (8 / 7)

Now we can use the fact that the perimeter of the smaller polygon is 42 inches:

4a = 42

a = 10.5

Substituting this into the ratio we found above, we get:

b = (8 / 7) * a = (8 / 7) * 10.5 = 12

Therefore, the larger polygon has a perimeter of:

4b = 4 * 12 = 48 inches.

Answer:

(x-4)^2 + (y+5)^2 = 324

Step-by-step explanation:

The equation of a circle is given by the equation (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center point of the circle.

Therefore, since the center point of the circle and the radius is given, we can just plug the numbers into the formula:

(x-4)^2 + (y+5)^2 = 18^2

(x-4)^2 + (y+5)^2 = 324

Answer:

Correct ones:

3ab = 10

m + 5 = 24

72 = 8p

Step-by-step explanation:

Answer: 12.5

Step-by-step explanation:

12.5 is the length of BC.

Here, we have,

given that,

In the diagram shown below, AC is tangent to circle o at A and to circle Pat C, OP intersects AC at B, OA = 5, AB = 5, and PC = 10.

now, we know that,

∠OAB and  ∠BCP are right angles, because of the tangents.

and, ∠OBA ≅ ∠CBP (vertical angles)

thus, we get,

ΔAOB ≅ ΔCBP, by AA rule.

so, we can set up the proportion:

10/4 = x/5

or, x = 12.5

Hence, 12.5 is the length of BC.

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To approximate the probability of obtaining between 56 and 73 tails (inclusive) when a fair coin is tossed 130 times, we can use the normal distribution as an approximation for the binomial distribution.

The binomial distribution describes the probability of getting a certain number of successes (in this case, tails) in a fixed number of independent Bernoulli trials (coin tosses), assuming a constant probability of success (0.5 for a fair coin). However, for large values of n (number of trials) and when the probability of success is not too close to 0 or 1, the binomial distribution can be approximated by a normal distribution.

To apply the normal distribution approximation, we need to calculate the mean (μ) and standard deviation (σ) of the binomial distribution. For a fair coin, the mean is given by μ = n * p = 130 * 0.5 = 65, and the standard deviation is σ = √(n * p * (1 - p)) = √(130 * 0.5 * 0.5) ≈ 5.7.

Next, we convert the values 56 and 73 into z-scores using the formula z = (x - μ) / σ, where x represents the number of tails. For 56 tails, the z-score is (56 - 65) / 5.7 ≈ -1.58, and for 73 tails, the z-score is (73 - 65) / 5.7 ≈ 1.40.

Finally, we use a standard normal distribution table or a calculator to find the probabilities associated with these z-scores. The probability of obtaining between 56 and 73 tails (inclusive) can be calculated as the difference between the cumulative probabilities corresponding to the z-scores.

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Answer:

hola soy dora

Step-by-step explanation:

soy stan kim namjoon

Answer:

hopes it's helps

Step-by-step explanation:

I got 20 blocks for my answer

Answer:

20 blocks from the bottom

Step-by-step explanation:

red - 3. 6. 9. 12. 18. 21. 24. 27.

green - 5. 10. 20. 25.

yellow - 15. 30.

the 20th block is the third painted green block from the bottom

All of the following properties are indeed associated with Student's t-distributions: satisfies the 68-95-99.7 Rule, symmetric, unimodal, and bell-shaped.

Student's t-distributions have several characteristics that make them useful in statistical inference. They are symmetric, meaning that the distribution is the same on both sides of the mean. They are also unimodal, which means they have a single peak or mode. Additionally, they are bell-shaped, resembling a symmetrical, bell-shaped curve.

Student's t-distributions do not satisfy the property that "Area Under the Curve is One." Unlike some other probability distributions, such as the normal distribution, the total area under the curve of a t-distribution is not equal to one. The area under the curve represents the probability, and for a t-distribution, the total probability is not necessarily equal to one.

While Student's t-distributions possess the properties of the 68-95-99.7 Rule, symmetry, unimodality, and bell-shape, they do not adhere to the property that the "Area Under the Curve is One." It is important to understand these characteristics when using t-distributions in statistical analysis and hypothesis testing.

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Therefore, the answer is option C: theta = pi/2 and theta = 3pi/2.

To determine when tan(theta) is undefined on the unit circle, we need to remember the definition of the tangent function.
Tangent is defined as the ratio of the sine and cosine of an angle. Specifically, tan(theta) = sin(theta)/cos(theta).

Now, we know that cosine can never be equal to zero on the unit circle, since it represents the x-coordinate of a point on the circle and the circle never crosses the x-axis. Therefore, the only way for tan(theta) to be undefined is if the cosine of theta is equal to zero.
There are two values of theta on the unit circle where cosine is equal to zero: pi/2 and 3pi/2.

At theta = pi/2, we have cos(pi/2) = 0, which means that tan(pi/2) = sin(pi/2)/cos(pi/2) is undefined.
Similarly, at theta = 3pi/2, we have cos(3pi/2) = 0, which means that tan(3pi/2) = sin(3pi/2)/cos(3pi/2) is also undefined.
Therefore, the answer is option C: theta = pi/2 and theta = 3pi/2.

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Answer:

No solution

Step-by-step explanation:

As 6x on lhs and 2×3x on the rhs are equal and cancel each other

Answer:

x = 45, y = 85

Step-by-step explanation:

In this figure we can see a Z-angle, which tells us that x = 45

In a triangle, the sum of the angles is 180 degrees,

so the unknown angle in the triangle is 180 - 45 - 85 = 50

For a straight line, the total angle is 180 degrees,

, so y + x + unknown angle of triangle = 180

since x = 45, and unknown angle of triangle = 50,

y = 180 - 45 - 50 = 85

This can also be seen when you realise that the two parallel lines give an F-angle, which tells us that Y = 85

The given fraction (x^2-25)/(x^2-x-20) expressed in simplest form is (x+5)/(x+4). (Option C)

A fraction is in simplest form if the numerator and denominator have no common factors other than 1. In order to solve the given fraction, the numerator and denominator must be factorized, and the common factor will be canceled out.

Factoring x^2 – 25 using the difference of squares formula that states that a^2 – b^2 = (a + b)(a - b)

x^2 – 25 = x^2 – 5^2 = (x + 5)(x – 5)

Factoring x^2 – x – 20,

x^2 – x – 20 = x^2 + 4x – 5x – 20 = x(x + 4) -5(x + 4) = (x + 4)(x – 5)

Hence, factor (x – 5) is there in both numerator and denominator, it is canceled out. Hence the fraction in the simplest form is:

(x + 5)(x – 5)/ (x + 4)(x – 5) = (x + 5)/(x + 4)

Note: The question is incomplete.  The complete question probably is:  What fraction represents(x^2-25)/(x^2-x-20) expressed in simplest form. A) 5/4 B) (x-5)/(x-4) C) (x+5)/(x+4) D)25/(x+20)

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Answer:

Answer D

Step-by-step explanation:

Number of hours, 3

Cost: 105

divide 105 by 3 = 35

35 = cost of boat for 1 hour

so the answer is D :)

C = 35h

C = cost

H = hours

:)

Answer:

D. C = 35h

Step-by-step explanation:

105/3 = 35

that means it cost $35 an hour to rent the boat

so 35 x number of hours you rent = total cost

which is C = 35h

The Total surface of triangular prism  is 112 inches.

To calculate the surface area of a triangular prism, you need the measurements of the base and the height of the triangular faces, as well as the length of the prism.

The given measurements are;

Base ; 5 inches and  4 inches

height is 8 inches

Length of the prism is 2 inches.

To find the total surface area, we sum up the areas of all the faces:

Total surface area = area of triangular  faces + area of rectangular faces + area of lateral faces.

area of triangular faces = 5 inches × 4 inches = 20 inches.

area of the two faces = 20 ×2 =40

Area rectangular faces = 5 inches × 8 inches/ 2 = 40 inches.

Area of lateral faces = 8 inches ×2 = 16 square inches

for the two lateral faces is 16 × 2 = 32 square inches.

Total surface area = 40 square inches + 40 inches + 32 square inches = 112 square inches.

The Total surface of triangular prism  is 112 inches.

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