NEED HELP FRERE BRAINLIST

The answer is 15 because you have two equal signs so they add up and that's why it gives that answer

Rational numbers are indeed closed under the operations of addition, subtraction, and multiplication is true.

We have,

A rational number is any number that can be expressed as a ratio of two integers, where the denominator is not equal to zero.

The set of rational numbers is closed under the operations of addition, subtraction, and multiplication.

This means that if we take any two rational numbers and add them, subtract them, or multiply them together, the result will always be another rational number.

To see why this is true,

Consider two rational numbers a/b and c/d, where a, b, c, and d are integers and b and d are not equal to zero.

To show that rational numbers are closed under addition, we can add the two rational numbers as follows:

a/b + c/d = (ad + bc) / bd

Since a, b, c, and d are all integers, ad + bc is also an integer.

Also, since b and d are not equal to zero, bd is also not equal to zero.

And,

(ad + bc) / bd is a ratio of two integers, where the denominator is not equal to zero.

This means that it is a rational number.

To show that rational numbers are closed under subtraction, we can subtract the two rational numbers as follows:

a/b - c/d = (ad - bc) / bd

Again, since a, b, c, and d are all integers, ad - bc is also an integer, and bd is not equal to zero.

Therefore, (ad - bc) / bd is a rational number.

Finally, to show that rational numbers are closed under multiplication, we can multiply the two rational numbers as follows:

(a/b) x (c/d) = (ac) / (bd)

Once again, ac and bd are integers, and since b and d are not equal to zero, bd is also not equal to zero.

Therefore, (ac) / (bd) is a rational number.

Thus,

Rational numbers are indeed closed under the operations of addition, subtraction, and multiplication.

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The percent of attendance figures that differs from the mean by 1500 persons or more is 6.68%.

From the question above, Mean μ = 10,000

Standard Deviation σ = 1,000

The formula for z-score is :

z = (x-μ) / σ

Where, x = observation

z = z-score

Mean μ = 10,000

Standard Deviation σ = 1,000

From the above formula, let's calculate z-score for x = 11,500

z = (x-μ) / σ

z = (11,500 - 10,000) / 1000

z = 1.5

Now, find the probability of attendance figures that differs from the mean by 1500 persons or more.

P(z ≥ 1.5) = 0.0668

To find the percentage, we need to multiply the above value by 100.

P(z ≥ 1.5) × 100 = 0.0668 × 100 = 6.68%

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STEP 1

Interpret question to make sense geometrically.

We have circular shapes, thus, we are dealing with circles and these circles have their area, however, we seek the angle with which when used to cut the circle will give us an area of 220 sq cm.

Note that this is a fraction of the total area of the circle.

This will be illustrated diagrammatically below

Area of a sector is given as:

STEP 2

Find unknown

The ci

Answer:

qualitative and ordinal.

Step-by-step explanation:

They are both two types of qualitative data under Categorical data.

Nominal and ordinal are the levels of measurement for which data can be qualitative. Therefore, the correct option is option A, D.

A categorization that describes the type of information contained inside the importance attributed to variables is called level of measurement and scale of measure. The most well-known classification was created by psychiatrist Stanley Smith Stevens and included four levels or measurement scales: nominal, ordinal, interval, or ratio.

This system of defining several measurement levels originated within psychology and has drawn heavy criticism from academics in other fields. Additional classifications include those made by Chrisman, Mosteller, and Tukey. Nominal and ordinal are the levels of measurement for which data can be qualitative.

Therefore, the correct option is option A, D.

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To determine the number of ways to assign 7 volunteers to 7 booths for the charity bazaar, we can consider the concept of permutations. Since each volunteer must be assigned to a different booth, we are essentially permuting the volunteers among the booths.

The number of ways to arrange 7 volunteers into 7 distinct booths can be calculated using the factorial function. The factorial of a number n, denoted as n!, represents the product of all positive integers from 1 to n.

In this case, we have 7 volunteers and 7 booths, so we need to calculate 7!.

7! = 7 × 6 × 5 × 4 × 3 × 2 × 1 = 5,040

Therefore, the correct answer is C. There are 5,040 ways to assign 7 volunteers to 7 booths for the charity bazaar. Each arrangement represents a unique assignment of volunteers to booths, ensuring that each volunteer is assigned to a different booth.

It is worth noting that the factorial function grows rapidly as the number increases. In this case, with 7 volunteers and 7 booths, the number of possible arrangements is quite large.

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Answer:

i cant do the graph rn but the slope would be y=4x-2

Step-by-step explanation:

Answer:

x = 48; y = 13

Step-by-step explanation:

20/5 = 52/y

4 = 52/y

4y = 52

y = 13

20/5 = x/12

4 = x/12

x = 4 * 12

x = 48

Answer:

x = 48, y = 13

Step-by-step explanation:

Since they have a pair of verticle angles, this means the triangles are similar. You find a common side (the length 5 and length 20) and you know the ratio, (divide 20 by 5) aka. the larger triangle is 4 times larger than the smaller one. That means the side lengths are also 1/4 scale. So the bigger triangle = 12(length of side)*4(ratio). Also since y is on the smaller triangle, you scale it down by 1/4, so 52 (the side length) / 4 (ratio) is 13. So y = 13, x =48

Area of polygon d compared to the area polygon c is 36 times larger.

What is polygon?

In pure mathematics, a polygon could be a figure that's delineated by a finite variety of line segments connected to create a closed polygonal chain. The finite plane region, the bounding circuit, or the 2 along, could also be referred to as a plane figure. The segments of a polygonal circuit area unit referred to as its edges or sides.

Main body:

You simply square the linear scale factor 6 and we get 6^2 = 6*6 = 36

You can think of a square with sides of 2 by 2, so the area is 4

If you multiply each dimension by 6, then the square is now 12 by 12 and the new area is 144. Notice how 144/4 = 36, or put another way 36*4 = 144

Hence polygon d is 36 times larger than c.

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Answer:

∠ N = 10° , arc RS = 134°

Step-by-step explanation:

the measure of an inscribed angle is half the measure of its intercepted arc.

(5)

∠ N is an inscribed angle and we require arc LM

the measure of the arcs in a circle = 360°

note LN is the diameter so arc LN = 180°

Then

LM + MN + LN = 360°

LM + 160° + 180° = 360°

LM + 340° = 360° ( subtract 340° from both sides )

LM = 20°

then

∠ N = \(\frac{1}{2}\) LM = \(\frac{1}{2}\) × 20° = 10°

(6)

∠ Q is an inscribed angle so its intercepted arc is twice its measure

arc RS = 2 × 67° = 134°

The value of the shaded parts of the large squares cannot be determined without additional information.

The question states that each large square has a value of one, but it does not specify the values of the shaded parts within the large squares. Without knowing the specific values assigned to the shaded parts, it is not possible to calculate their total value.

The shaded parts could represent any numerical value depending on the context or instructions given. Therefore, a specific answer cannot be determined without further information.

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After the partitioning algorithm has completed, the low partition would be (27, 56, 46, 57) and the high partition would be (99, 77, 90).

Explanation: In the quicksort algorithm, partitioning is an important step. The partition algorithm in quicksort chooses an element as a pivot element and partition the given array around it.

In this way, we will get a left sub-array that consists of all elements less than the pivot, and the right sub-array consists of all elements greater than the pivot. If the pivot element is selected randomly, then quicksort performance would be O(n log n) in the average case.

In the given question, the given numbers are (27, 56, 46, 57, 99, 77, 90), and the pivot element is 77.To partition this array, the following steps are followed.

1. The left pointer will point at 27, and the right pointer will point at 90.

2. Increment the left pointer until it finds an element that is greater than or equal to the pivot element.

3. Decrement the right pointer until it finds an element that is less than or equal to the pivot element.

4. If the left pointer is less than or equal to the right pointer, swap the elements of both pointers.

5. Repeat steps 2 to 4 until left is greater than right.

In the given question, the left pointer will point at 27, and the right pointer will point at 90. Incrementing the left pointer will find the element 56, and the decrementing the right pointer will find the element 77.

As 56 < 77, swap the elements of both pointers. In this way, partitioning continues until left is greater than right. Now, the array will be partitioned into two sub-arrays.

The left sub-array will be (27, 56, 46, 57), and the right sub-array will be (99, 77, 90).

So the low partition is (27, 56, 46, 57), and the high partition is (99, 77, 90).

Therefore, the answer is: low partition (27, 56, 46, 57) and high partition (99, 77, 90).

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Answer:

(f · g)(x) = 3x³ + 6x² - 5x - 10

General Formulas and Concepts:

Step-by-step explanation:

Step 1: Define

f(x) = x + 2

g(x) = 3x² - 5

Step 2: Find (f · g)(x)

Answer:

from 4:15 to 5:45 is 90 mins, or 1 hour and 30 mins. if you add 1 hour, 30 mins + 1 hour, 30 mins + 1 hour, 30 mins you will get 3 hours, 90 mins. this becomes 4 hours and 30 mins.

Step-by-step explanation:

Answer:

4.5 stup1dhfalih;lhs;iyqwrpo8tpy vwo;yprwtywouyt oyweoiywerioy2408t479569253870349704937084585234843684304638348643983 46439643964389435 836295

Step-by-step explanation:

Answer:80% - 70%

Step-by-step explanation:

If the margin for the error is 5% im guessing that means 5% backwards or forwards so i believe that my answer is correct

ps if im right brainliest please

The percentage range that reflects the population's true response, considering the margin of error, is from 70% to 80%.

Given, a margin of error of 5%, we can determine the range that reflects the population's true response.

To find the range, we consider the maximum and minimum values within the margin of error.

Maximum Value: 75% + 5% = 80%

Minimum Value: 75% - 5% = 70%

Therefore, the percentage range that reflects the population's true response, considering the margin of error, is from 70% to 80%.

This means that we can be 95% confident that the actual percentage of people who would buy the product again lies within this range.

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a. The significance level of the test is the probability of rejecting the null hypothesis 1 - F(k). b. The value of k at the midpoint of this interval is the solution. c. the exact relationship between the number of chips and the temperature depends on the details of the chip fabrication process and the testing procedure.

(a) Suppose the rejection set of the test is {k or more chips fail in one day}. To find the significance level of the test as a function of the number of chips tested, we need to calculate the probability of rejecting the null hypothesis when it is true, which is the probability of observing k or more failures in one day when the chips are operating normally. This probability is given by the cumulative distribution function (CDF) of the exponential distribution with mean years, evaluated at the time period of one day:

P(reject null | null is true) = P(k or more failures in one day | normal operation) = 1 - F(k)

where F(k) is the CDF of the exponential distribution with mean years, evaluated at k/365. The significance level of the test is the probability of rejecting the null hypothesis when it is true, so we have:

significance level = P(reject null | null is true) = 1 - F(k)

(b) To find the number of chips that must be tested at temperature degree Celsius so that the significance level is , we need to solve the equation:

1 - F(k) =for k, where F(k) is the CDF of the exponential distribution with mean years, evaluated at k/365 and is the desired significance level. Since the exponential distribution is a continuous distribution, we can use a numerical method to solve this equation. One way is to use a root-finding algorithm such as the bisection method or Newton's method. For example, using the bisection method, we can start with an initial interval [a, b] that brackets the solution and iteratively bisect the interval until we obtain an interval of desired width that contains the solution. The value of k at the midpoint of this interval is the solution.

(c) If we raise the temperature during the test, the number of chips we need to test will decrease. This is because the higher temperature increases the failure rate of the chips, making it easier to detect contamination problems. However, the exact relationship between the number of chips and the temperature depends on the details of the chip fabrication process and the testing procedure, so we cannot give a general answer to this question without more information.

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Answer:

whats the question?

Step-by-step explanation:

im guessing it was how many green peppers there are and if it is there is 1 pepper

Answer:

300 ft in one hour.

Step-by-step explanation:

The validity of measurement or data refers to the accuracy of the measurement instrument or data-acquisition tool. The answer is option(e).

The constructive nature of perception is best described as the influence of expectations on sense-perception. The answer is option(a).

1) The validity of measurement or data refers to the accuracy of the measurement instrument or data-acquisition tool. It is a basic assessment of the instrument's accuracy, including whether it can properly and appropriately evaluate what it was intended to evaluate.

2) Our experiences can affect how we interpret sensory data, causing us to see things that aren't there or failing to see things that are. As a result, perception is a two-way street in which sensory input is combined with prior experiences to create our understanding of the world around us.

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Answer:

This is an geometric sequence with a common ratio r of 1/2

Step-by-step explanation:

When you find out r, you realize the ratio between the numbers to be dividing by 2, or 1/2. Since it is r and not common difference d, it is an geometric sequence.

Answer:

No, they are not equivalent ratios.

Step-by-step explanation:

The denominator of 14/25 is 25, which is 5 times 5.

If you multiply the numerator and denominator of 3/5 by 5, you get 15/25 which does not equal 14/25

The correct hypothesis statement for this golfer to prove his claim would be:

\(H_{0} :u\geq 90\)

\(H_{1} :u < 90\)

The golfer claims that his average score is less than 90.

Therefore, the null hypothesis is the opposite of what he claims

Null hypothesis \(H_{0}\) is average score \(u\) is greater than or equal to 90:

\(u \geq 90\)

\(H_{0} :u\geq 90\)

Alternative hypothesis \(H_{1}\) is then the opposite of null hypothesis.

Hence alternate hypothesis \(H_{1}\) is u< 90

\(H_{1} :u < 90\)

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Using proportions, we find that: Trevor's family paid $0.03 per minute on shower water.

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

This question is solved using proportions.

Thus, the total amount of liters used is:

\(L = 72 \times 6 = 432\)

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

Thus, the total amount paid was of:

\(A = 432 \times 0.2 = 86.4\)

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

The amount of dollars per minute is:

\(D = \frac{86.4}{2880} = 0.03\)

Trevor's family paid $0.03 per minute on shower water.

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Trevor's family paid $ 1.33 per minute on shower water.

Since the house Trevor's family lives in has 6 people (including Trevor) and 3 bathrooms, and in the past month, each person showered for an average of 480 minutes and used an average 72 liters of shower water (over the entire month), and water costs 0.20 dollars per liter, to determine how much did Trevor's family pay per minute on shower water, the following calculation must be performed:

You must multiply the number of liters by its value, and divide that result by the number of minutes that each person consumed, in order to obtain the value per minute on shower water.

Therefore, Trevor's family paid $ 1.33 per minute on shower water.

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The closest measurement in square inches to the overall surface area of the candle is 87.92 square inches.

To find the total surface area of the candle, we need to calculate the lateral surface area (excluding the top and bottom) and then add the areas of the two circular bases.

1. Lateral Surface Area:

The formula for the lateral surface area of a cylinder is given by A = 2πrh, where r is the radius of the base and h is the height of the cylinder.

Given that the diameter of the candle is 4 inches, we can calculate the radius by dividing the diameter by 2:

Radius (r) = 4 inches / 2 = 2 inches

Height (h) = 5 inches

Using the formula, we can calculate the lateral surface area:

Lateral Surface Area = 2π(2 inches)(5 inches) = 20π square inches

2. Base Area:

The formula for the area of a circle is given by A = πr^2, where r is the radius of the circle.

Using the radius calculated earlier (r = 2 inches), we can calculate the area of each circular base:

Base Area = π(2 inches)^2 = 4π square inches

3. Total Surface Area:

To find the total surface area, we add the lateral surface area and the areas of the two circular bases:

Total Surface Area = Lateral Surface Area + 2(Base Area)

Total Surface Area = 20π + 2(4π) = 20π + 8π = 28π square inches

Approximating the value of π to 3.14, we can calculate the approximate total surface area:

Total Surface Area ≈ 28(3.14) = 87.92 square inches

Therefore, the closest measurement to the total surface area of the candle in square inches is 87.92 square inches.

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The largest angle of triangle ABC is angle B.

In this question, we have been given the side length of triangle ABC.

In ΔABC, AB = 3, BC = 4 and AC = 6.

We need to name the largest angle.

We know that the largest angle of triangle is always opposite to the longest side of the triangle.

We can observe that the longest side of ΔABC is AC = 6 units

The angle opposite to side AC is angle B.

Therefore, the largest angle of triangle ABC is angle B.

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Answer:

Step-by-step explanation:

The distance that the bug ran is the absolute value of the difference between its initial position and final position:

distance = |-47 - (-12)| = |-47 + 12| = 35

Therefore, the bug ran a distance of 35 units.

To calculate the average speed, we need to divide the distance by the time:

average speed = distance / time = 35 / 7 = 5

The units of average speed are units of distance divided by units of time, so the average speed of the bug is 5 units per minute (unit/min).

Answer:

(See the attachment)

Step-by-step explanation:

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Answer: Answer below

Step-by-step explanation: