What coefficients correctly balance this reaction?
CH₂OH + 0₂
_CO, + _ _ _H,O
1
2
3
4
-
1; 2; 1; 2
3; 3; 2; 4
2; 3; 2; 4
1; 3; 1; 2

Answers

Answer 1

Answer:

Step-by-step explanation:

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Related Questions

The Firt Amendment include four baic right or freedom. What are they? Which of thee will be the focu of thi unit?

Answers

The four basic right that were included in the first amendment are Freedom of speech , Freedom of religion , Freedom of press and Freedom of assembly .

The First Amendment of the U.S. Constitution guarantees the following four basic rights:

(i) Freedom of Speech: This includes the right to express oneself freely, whether through oral or written communication.

(ii) Freedom of Religion: This protects an individual's right to practice their own religion or to not have a religion at all, without government interference.

(iii) Freedom of the Press: This protects the right of the media to publish and report the news without government censorship or restraint.

(iv) Freedom of Assembly: This allows individuals to gather and associate with others, including the right to form and participate in organizations and protest movements.

The given question is incomplete , the complete question is

The First Amendment include four basic right or freedom. What are they ?

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Simplify. Remove all perfect quare from inide the quare root. Aume x i poitive. √20x^8

Answers

The simplified form of the expression of the square root [tex]\sqrt{20x^8}[/tex] is [tex]2\sqrt{5}x^4[/tex].

A square root of a number x in math is a number y such that y² = x. In other words, a square root  is the factor that we can multiply by itself to get that number. The symbol of square root is called a radix or a radical sign "√".

We're given a square root of an algebraic term. And, we're asked to simplify the square root so that the perfect square is removed from inside the square root, assuming that x is positive. We can find the simplified form of the square root as follows:

[tex]\sqrt{20x^8}=\sqrt{4\cdot 5x^8}=\sqrt{2^2\cdot 5x^8}}=\sqrt{2^2}\cdot \sqrt{x^8}\cdot \sqrt{5}=\2x^4\sqrt{5}=2\sqrt{5}x^4[/tex]

We have confirmed that [tex]2\sqrt{5}x^4[/tex] is indeed the simplified form of [tex]\sqrt{20x^8}[/tex].

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find the market equilibrium point for the following demand and supply functions. demand: p = −2q 280 supply: p = 8q 1

Answers

The market equilibrium point for the following demand and supply functions are, demand and supply p = 224.2

He estimated the market demand and supply function as follows demand : P = −2q + 280     (Equation-1)

supply: P =  8q + 1          (Equation-2)

We need to find the equilibrium price

The equilibrium price (EP) is the price where the demand for a product or service balances its supply. .

At equilibrium price

Demand function = supply function

−2q + 280 = 8q + 1

280 - 1 = 8q + 2q

279 = 10q

q = 279/10

q = 27.9

We can substitute equation-1,

The equilibrium price = −2q + 280

The equilibrium price = -2(27.9) + 280

The equilibrium price = -55.8 + 280

The equilibrium price = 224.2

We can substitute equation-2,

The equilibrium price = 8q + 1

The equilibrium price = 8(27.9) + 1

The equilibrium price = 223.2 + 1

The equilibrium price = 224.2

demand: p = 224.2

supply: p = 224.2

Therefore,

The market equilibrium point for the following demand and supply functions are, demand and supply p = 224.2

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Find the geometric mean between 24 and 25

Answers

Answer:

Answer: 24.5

Step-by-step explanation:

The geometric mean between 24 and 25 is about 24.49.

What are mean and median?

The mean is the average value which can be calculated by dividing the sum of observations by the number of observations

Mean = Sum of observations/the number of observations

Median represents the middle value of the given data when arranged in a particular order.

We are given that;

The numbers 24 and 25

Now,

To find the geometric mean between two numbers, we need to use the formula:

Geometric mean=ab​

where a and b are the two numbers.

Since we have 24 and 25 as the two numbers, we can plug them into the formula and get:

geometric mean=24×25​=600​≈24.49

Therefore, by the mean the answer will be 24.49.

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Given the figure above what is m/_L

Answers

The angle where the tangent intersect is as follows:

m∠L = 55 degrees.

How to find the angles when tangent intersect?

A line that touches the circle at a single point is known as a tangent to a circle.

Therefore, the measure of the angle formed by the intersection of tangents is equals to half the difference of the intercepted arcs.

Hence,

m∠L = 1 / 2 (235 - (360 - 235))

m∠L = 1 / 2 (235 - 125)

m∠L = 1 / 2 × 110

m∠L =  55 degrees

Therefore, the measure of the angle formed by the intersection of the tangent is 55 degrees.

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all piece must be assigned for the appropriate functional groups (ir) and protons (nmr) to earn full credit. 6. c5h10o

Answers

The correct answer is C5H10O which is also known as Methyl propyl ketone.

Methyl propyl ketone is a clear, colorless liquid with a nail polish-like smell. 45 °F flash point water soluble and less dense than water. consequently floats on water. 0.809 g/cm3 for density. heavier than air vapors.

CH3 – CH2 —C—CH? C–CH2–CH3 Molecular Formula: C5H100 Molecular Weight: 86.1 Name: 3-pentanone

CsH10 (4pts) IR C=O overtone 2941cm-1 C-H symmetric and asymmetric stretching of (-CH3 & -CH2-) 1716 cm-1 C=O stretch of K

6. C5H10O

CH3 – CH2 – CH-6-H CH: Molecular Formula: C5H100 Molecular Weight: 86.1 Name: 2-methylbutanal

IR C=0 Overtone Orman mu C-H Aldehyde Doublet stretch C-H symmetric and asymmetric stretching of sp3 carbon C=0 stretch HNMR

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two cars leave the origin; one goes north at mph and the other goes south at mph. after how many hours will they be miles apart?

Answers

After 2.94 Hr. or approximately 3 Hr. both cars will be 250 miles apart.

We have,

The value of the speed of the car moving in the north direction =35 mph

The value of the speed of the car moving in the south direction=50 mph

From above, we can conclude that both are going in the opposite direction

So, the value of the net speed/ relative speed of both the car will be =35+50=85 mph

As we know,

The value of distance can be determined by using the relationship:

Distance = speed * time

So, for determining the value of time, we will put the value of total distance covered and the value of relative speed in the above expression.

Thus, we will get it as:

250=85*t

So, the value of the time taken = t=250/85=2.94 hours approx 3 hours

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The complete question should be like:

Two cars leave the origin; one goes north at 35mph and the other goes south at 50 mph. After how many hours will they be 250 miles apart?

you have 28 cards and 10 envelopes (labeled 1,2, ..,10). in how many ways can you put the 28 cards into the envelopes if:

Answers

The number of permutations of putting the 28 cards into the envelopes is 1024.

A permutation is the arrangement of objects in a specific order. When we are counting the number of permutations of a set of objects, we are finding the total number of ways that the objects can be arranged.

In your question, you have 28 cards and 10 envelopes. To find the number of permutations of putting the 28 cards into the envelopes, we need to consider a few factors.

Firstly, each envelope can only hold a maximum of

=> 28/10 = 2 cards.

Secondly, the order in which the cards are placed into the envelopes matters,

Since each envelope can only hold a maximum of 2 cards, we have two options for each envelope: either 0 cards or 2 cards.

We can use a binary code of 0 and 1 to represent this, where 0 means the envelope is empty and 1 means the envelope has 2 cards.

Therefore, the total number of permutations can be calculated as

=> 2¹⁰ = 1024

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We have two mass storage devices, A and B with the same specs. Each can store N bits, but read/write operations are slow. We mitigate this problem by turning the two devices into a storage array: data is alternatingly written to A and B. The array can now store 2N bits, and read and write at almost twice the speed of the individual devices, assuming that the time it takes to send data to A and B is negligible, compared to the time it takes each device to write the data.There is however a flaw in this plan. Since data is distributed over two devices, the total chance of failure has now doubled. The failure of just one device causes the failure of the array.We could eliminate this problem by copying all of A's data redundantly to an additional devices C, and all of B's data to an additional device D. This insures against single and double drive failure, but at the cost ofdoubling the required amount of storage devices.We decide that simultaneous drive failure is sufficiently unlikely to ignore that possibility, and we will guard against data loss from single drive failure only. This requires only one extra device C, as follows:We abstract each device as a list of bits, A= a1, a2,..., aN, B=b1, b₂,... bNand C=C1, C2,..., CN.Then for each k=1...N, C storesCk=ak XOR bkHere, XOR is the bitwise exclusive or operation.(a) (2 points) With this scheme, if bit k fails on device A or B (not both), it can be reconstructed from bit k on device C. Explain.(b) (2 points) Would the same reconstruction property still hold if you used logical AND instead of XOR? Explain your answer.(c) (2 points) Would the same reconstruction property still hold if youused logical inclusive OR instead of XOR? Explain your answer.

Answers

The best mathematical operation to use when considering the probability of data loss from single drive failure is XOR.

Data storage is a critical process, as any data loss could have disastrous consequences.

The XOR technique uses one extra device (C) to store the exclusive OR result of the data stored on devices A and B. This means that for each bit k, the value of Ck is the exclusive OR of ak and bk.

This means that if bit k fails on device A or B (not both), it can be reconstructed from bit k on device C. This is because the exclusive OR of two identical bits is 0 and the exclusive OR of two different bits is 1, which can be used to reconstruct the failed bit from the other one.

The same cannot be said of the AND or OR technique. If we use the AND technique, the value of Ck would be the logical AND of ak and bk.

In this case, the failed bit could not be reconstructed from the other bit, as the logical AND of two identical bits is the same bit and the logical AND of two different bits is 0.

The same problem applies for the OR technique, as the value of Ck would be the logical OR of ak and bk, and the failed bit could not be reconstructed from the other bit.

Thus, XOR is the best mathematical operation to use when considering the probability of data loss from single drive failure.

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we send 3 bits over a channel. the probability of successfully recovering each bit is equal to 1/3 and independent of other bits. what is the probability that neither of the 3 bits is recovered successfully (the probability of 3 failures)?

Answers

The probability that neither of the 3 bits is recovered successfully is 8/729.

Each bit is transmitted over the channel with a success probability of 1/3 and a failure probability of 2/3. The success and failure of each bit are independent, meaning that the success of one bit does not affect the success of another bit.

The probability of successfully recovering all 3 bits is (1/3) * (1/3) * (1/3) = 1/27.

Similarly, the probability of failing to recover all 3 bits is (2/3) * (2/3) * (2/3) = (8/9)^3 = 8/729.

This means that there is a 8/729 chance that the transmission of all 3 bits will fail.

So, the probability that neither of the 3 bits is recovered successfully (the probability of 3 failures) is 8/729.

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An 8-foot ladder is leaning against a wall so that the top of the ladder is 5 feet above the ground. If a 15-foot ladder is leaned against the wall and forms the same angle with the wall, how high up the wall does this ladder reach? Enter your answer in the box. Show your answer to thousandths.

Answers

Let's call the height the 8-foot ladder reaches on the wall "h1", and the height the 15-foot ladder reaches on the wall "h2". We can set up a proportion to find h2, using the heights and lengths of the ladders:

(h2 + 5) / 15 = (h1 + 5) / 8

We can cross multiply to solve for h2:

15 * (h1 + 5) = 8 * (h2 + 5)
120 + 75 = 8h2 + 40
195 = 8h2 + 40
155 = 8h2
h2 = 19.375 feet

So the 15-foot ladder reaches 19.375 feet up the wall

Decide whether the following statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain your reasoning. Be sure to consider whether the units are appropriate to the statement, as well as whether the stated amount makes any sense. For example, a statement that someone is 15 feet tall uses the units (feet) appropriately, but does not make sense because no one is that tall. I know a professional bicyclist who weighs 220 kilograms. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to the nearest tenth as needed.) O A. This statement does not make sense because 220 kilograms = pound(s), which is an unreasonable weight for a professional bicyclist. OB. This statement makes sense because 220 kilograms = pound(s), which is a reasonable weight for a professional bicyclist. OC. This statement does not make sense because a kilogram is not a unit of mass.

Answers

The statement 'I know a professional bicyclist who weighs 220 kilograms' does not makes sense because 220 kilograms = 485.017 pounds, which is not a reasonable weight for a professional bicyclist.

Therefore the answer is A. This statement does not makes sense because 220 kilograms = 485.017 pound(s), which is an unreasonable weight for a professional bicyclist.

A kilogram is a unit of mass and is commonly used to measure the weight of individuals. One kilogram is equivalent to approximately 2.205 pounds, so 220 kilograms is equivalent to 485.6 pounds, which is off the weight range of many professional cyclists, who typically have a low body fat percentage and high muscle mass. Therefore, it is not possible for a professional cyclist to weigh 220 kilograms and this statement does not makes sense.

--The question is not readable, the question is given below--

"Decide whether the following statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain your reasoning. Be sure to consider whether the units are appropriate to the statement, as well as whether the stated amount makes any sense.

For example, a statement that someone is 15 feet tall uses the units (feet) appropriately, but does not make sense because no one is that tall.

I know a professional bicyclist who weighs 220 kilograms.

Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to the nearest tenth as needed.)

A. This statement does not make sense because 220 kilograms = pound(s), which is an unreasonable weight for a professional bicyclist.

B. This statement makes sense because 220 kilograms = pound(s), which is a reasonable weight for a professional bicyclist.

C. This statement does not make sense because a kilogram is not a unit of mass."

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Use the diagram as a reference to answer the question below.
If arctan 3/3 = B find the measures of angles a and b and side lengths h, k, and r.

Answers

The trigonometric ratios for sine and tangent, where arctan(√3/3) is β, indicates that we get;

α = 60°, β = 30°, h = √3, k = 3, and r = 2·√3

What are trigonometric ratios?

Trigonometric ratios expresses the relationship between an interior angle and two of the sides of a right triangle.

The details of the question are;

arctan(√3/3) = Angle β

The trigonometric ratio for tangent indicates that we get;

tan(β) = h/k

Therefore, arctan(h/k) = β

However, arctan(√3/3) = β

The comparison of the above two equations indicates that we get;

h/k = √3/3

Therefore, if h = √3, k = 3

tan(α) = k/h

Therefore, tan(α) = 3/√3 = √3

r = √(h² + k²)

r = √(3 + 9) = √(12) = 2·√3

sin(β) = h/r

Therefore, sin(β) = √3/(2·√3) = 1/2

β = arcsin(1/2) = 30°

The specified triangle is a right triangle, therefore;

α + β = 90°

α = 90° - β

α = 90° - 30° = 60°

α = 60°

Therefore, α = 60°, β = 30°, h = √3, k = 3, r = 2·√3

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by definition a capable process is one that is operating at the so called ____ sigma level

Answers

by definition a capable process is one that is operating at the so called  capability sigma level

The statistical difference between a process operating at a 5 sigma level and a process operating at a 6 sigma level is markedly different when it comes to the number of defects present, which is a true statement because as we know process sigma indicates the process variation and is measured in terms of data units, while process sigma count Z, or process sigma level, is a count with no unit of measure and sigma is a statistical term that measures how much a process varies from perfection, based on the number of defects per million units. And also we know that a six sigma process is 1 in which 99.99966 percent of all chances to provide some characteristics of a part are statistically assumed to be free regarding defects.

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a city worker inspected 200 homes in dairy city. during that inspection, 120 homes were found to violate one or more city codes. the city worker released a statement that 60% of dairy city's 3,000 homes are in violation of city codes. this is .

Answers

If the city worker released the statement that 60% of dairy city's 3,000 homes are in violation of city codes , then the City Worker's statement is an example of : (d) Statistical Inference .

The Statistical Inference involves making generalizations about a population based on a sample.

In this case, the city worker has taken a sample of 200 homes out of the total 3,000 homes in Dairy City, and based on that sample, the City Worker is making an inference about the proportion of homes in violation of city codes for the entire population of Dairy City.

The statement is not a census as a census would involve collecting data from every single unit in the population, in this case every single home in Dairy City.

The given question is incomplete , the complete question is

A city worker inspected 200 homes in dairy city. during that inspection, 120 homes were found to violate one or more city codes. the city worker released a statement that 60% of dairy city's 3,000 homes are in violation of city codes.

The City Worker's statement is an example of :

(a) Census

(b) An experiment

(c) Descriptive Statistics

(d) Statistical Inference

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can someone please help me(10 points will give brainliest!!!)

Answers

(3,2) is the correct coordinates of P

Y= 3x^2 what is the value of y when x=2

Answers

Answer:12

Step-by-step explanation:

When x = 2, y = 3(2^2) = 3(4) = 12. So the value of y when x = 2 is 12.

what is 4x +10=30 and 4x-8=20.

Answers

Answer:

1: x = 5

4 x 5 = 20

20 + 10 = 30

2:

x = 7

4 x 7 = 28

28 - 8 = 20

Answer: 4x+10=30              4x-8=20

10-10=                                8+(-8)=0

30-10=20                           20+ 8= 28

4x=20                                 4x=28

4/4=1                                    4/4=1

20/4=5                                 28/4=7

x=5                                     x=7

Step-by-step explanation: Hope this helps!! :))

A company is planning to purchase a plot of land for $200,000 to build a factory. There are two options offered by a lending institution.

1. 20-year loan at 3.25% APR compound monthly
2. 30-year loan at 4.75% APR compound monthly


- Calculate the monthly payment for both options.

- Calculate the finance charge for both options.

- Determine which option is better for the company & explain why.

Answers

Answer:

1.)  20 yrs --> $1,045.63

    30 yrs --> $1,204.08

2. See the attachment

3. See the attachment

Step-by-step explanation:

Please find the attachment for detail

Find the perimeter of the isosceles trapezoid pictured above. Round to the nearest hundredth. Do not label your answer.

Answers

The perimeter of the isosceles trapezoid is 30.94 cm

How to find the perimeter of the isosceles trapezoid?

An isosceles trapezoid is a type of trapezoid where the two sides that are parallel to each other (known as the bases) are of equal length.

The perimeter of an isosceles trapezoid is the sum of the lengths of all four sides.

slant side = √(4²+2²) = 4.47 cm

Note: all sides are identical (check the attached image)

Perimeter = 9 + 4.47 + (2 + 9 + 2) + 4.47 = 30.94 cm

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if p(x)=(4x−5)(4x 5), what are the zeros of the polynomial?

Answers

The zeros of the polynomial p(x)=(4x−5)(4x + 5) are x = 5/4 and x = -5/4

We know that the zeros of a polynomial are the points where the polynomial becomes zero.

To find the zeros of polynomial P(x), equation the polynomial to zero P(x) = 0 and find the solutions of the equation P(x) = 0

Here, the polynomial is p(x)=(4x-5)(4x + 5)

To find the zeros of polynomial p(x) we equate p(x) to zero.

We get,

p(x) = 0

(4x - 5)(4x + 5) = 0

We solve above equation for x.

⇒ (4x - 5)(4x + 5) = 0

⇒ (4x - 5) = 0   OR   (4x + 5) = 0

⇒ 4x = 5         OR       4x = -5

⇒ x = 5/4      OR     x = -5/4

Therefore, x = 5/4 and x = -5/4 are zeros of p(x)

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what is the coefficient of x2 in the taylor series for sin2x about x=0? responses

Answers

The coefficient of x² in the Taylor series for sin²x about x=0 is 1

If a Taylor Series is centred at 0, then the series is known as the Maclaurin series.

Maclaurin series is given by f(x) = [tex]\text{\Large$ \Sigma$}\limits^{\infty}_{k=0} \frac{f^{(k)}(a)}{k!}x^k[/tex]

f(x) = sin²x

We need coefficient of x², let us take n=5

f(x) = [tex]\text{\Large$ \Sigma$}\limits^{\infty}_{k=0} \frac{f^{(k)}(a)}{k!}x^k[/tex]

f^0(x) = sin²x => f^0(0) = 0

f^1(x) = 2 sinx cosx => f^1(0) = 0

f^2(x) = -2 sin²x + 2 cos²x => f^2(0) = 2

f^3(x) = -8 sinx cosx => f^3(0) = 0

f^4(x) = 8 sin²x - 8 cos²x => f^4(0) = -8

f^5(x) = 32 sinx cosx => f^5(0) = 0

f(x) = 0(x^0) + 0(x^1) + (2/2!)(x^2) + (0/3!)(x^3) + (-8/4!)(x^4) + (0/5!)(x^5)

f(x)  = x^2 - (1/3)x^4

We can see that the coefficient of x² is 1.

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What is the quotient?
49 ÷ 3

This model describes the division calculation.

What do I put in the boxes

Answers

The value of 49 ÷ 3 is 16 remainder 1

How to evaluete the quotient

From the question, we have the following parameters that can be used in our computation:

49 ÷ 3

This can be interpreted as

49 divided by 3

Dividing 49 by 3 can be done using the given model

From the model, we have

49 ÷ 3 = (30 + 19) ÷ 3

This gives

49 ÷ 3 = (30 + 18 + 1) ÷ 3

So, we have

49 ÷ 3 = 16 1/3

So, the result is 16 remainder 1

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A salesperson works 40 hours per week at a job where he has two options for being paid. Option A is an hourly wage of ​$28. Option B is a commission rate of 4​% on weekly sales. How much does he need to sell this week to earn the same amount with the two​ options?

Answers

Based on the information, it can be inferred that this salesperson must make sales equivalent to $28,000 to obtain an equal profit with both options.

How to find the amount of money that he would have to sell to make the same profit with both options?

To find the amount of money that we must sell to have the same profit with both options we must carry out the following mathematical procedure.

1. We must calculate how much you would earn with option A in a week.

$28 * 40 = $1,120

2. We must make a rule of three to find a value of which 4% is equal to 1,120

4% - $1,120100% - x

100% * $1,120 / 4 = $28,000

Based on the above, the salesperson must sell $28,000 to make the same profit on both options in one week.

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Which measurements represent the side lengths of a right triangle?

Right Triangle
NOT a Right Triangle
6 cm, 8 cm, 10 cm
12 cm, 35 cm, 37 cm
4 cm, 6 cm, 10 cm
10 cm, 24 cm, 26 cm

Answers

Answer:

  (a) {6, 8, 10} cm

  (b) {12, 35, 37} cm

  (d) {10, 24, 26} cm

Step-by-step explanation:

You want to know which of the given sets of dimensions could be those of a right triangle.

6, 8, 10 cm12, 35, 37 cm4, 6, 10 cm10, 24, 26 cm

Pythagorean theorem

A set of side lengths will form a right triangle if they satisfy the Pythagorean theorem:

  a² +b² = c²

Application

  6² +8² = 36 +64 = 100 = 10² . . . . . {6, 8, 10} forms a right triangle

  12² +35² = 144 +1225 = 1369 = 37² . . . . . {12, 35, 37} forms a right triangle

  4 + 6 = 10 . . . . . {4, 6, 10} doesn't even form a triangle

  10² +24² = 100 +576 = 676 = 26² . . . . . {10, 24, 26} forms a right triangle

__

Additional comment

For three side lengths to form a triangle, the sum of the two short sides needs to be longer than the longest side. (This is the triangle inequality.)

Lengths 4, 6, 10 do not meet that requirement.

You may notice that the long sides of these triangles differ in length by 2 units. The short side is twice the square root of their average. This relation will hold for any right triangles having long sides that differ by 2.

  {6, 8, 10}  ⇒  6 = 2·√9

  {12, 35, 37}  ⇒  12 = 2·√36

  {10, 24, 26}  ⇒  10 = 2·√25

Along the same lines, if the longest sides differ by 1, the short side is the square root of their sum.

5. Use the graph to find the cost of 8 hats.
a. $7.50
b. $8.00
c. $60.00
d. $75.00

Answers

Answer:

c.  $60

Step-by-step explanation:

Go along the x-axis until you get to 8, then go straight up until you hit the line, now go straight over to the left until you hit the y-axis.  Your horizontal line will hit the y-axis at y=$60.



How has meeting the quilting
group changed Jada's thoughts
about her friends?

Answers

Meeting the quilting group has helped Jada to realize that her friends are not the only people who understand her, and that there are other people in the world who share her interests and struggles.

What is meeting?

Meeting is a gathering of two or more people to discuss a certain matter of common interest. It can be held in a physical or virtual space. The purpose of a meeting is usually to come up with a consensus on a certain topic, to resolve an issue, to discuss the progress of a project, or to make a decision. Meetings can be formal or informal and can take place in a variety of settings, such as a conference room, a boardroom, or even online. During a meeting, participants should be able to engage in a productive dialogue. The participants should also be able to listen to each other and exchange ideas.

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If x1 and x2 are solutions to 3x^2+15x+9=0 quadratic equation, then


1. x1+x2=

2.x1×x2=

Answers

The values for the  quadratic equation,

x₁ + x₂ = -5 and x₁ × x₂ = 3.

What are quadratic equations?

The definition of a quadratic as a second-degree polynomial equation demands that at least one squared term must be included. They are also known as quadratic equations.

Given equation,

3x² + 15x + 9 = 0

and given x₁ and x₂ are the solution of the equation or roots or zeros of the equation.

for any quadratic equation, the sum of the roots is equal to the -b/a

here x₁ + x₂ = -15/3 = -5

and the product of the roots is equal to the product of c/a

x₁ × x₂ = 9/3

x₁ × x₂ = 3

Hence x₁ + x₂ = -5,

x₁ × x₂ = 3.

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ABCD A B C D is a square. The equation of the diagonal AC A C is 3x+2y−7=0 3 x + 2 y - 7 = 0 . What is the equation of the diagonal BD B D , if the coordinates of vertex B B are (3, 5) ( 3 , 5 )

Answers

The equation of the diagonal BD is 2x - 3y + 9 = 0

What is the equation of the diagonal BD

We have the following parameters

Equation of AC = 3x + 2y - 7 = 0

Coordinate of B = (3, 5)

Make y the subject in the equation

So, we have

y = -3/2x + 7/2

The diagonals BD and AC are perpendicular

This means that

Slope of BD = -1/slope of AC

So, we have

m = 2/3

The equation is then calculated as

y = mx + c

This gives

y = 2/3x + c

Introduce the points

5 = 2/3 * 3 + c

Evaluate

c = 3

So, we have

y = 2/3x + 3

Rewrite as

3y = 2x + 9

This gives

2x - 3y + 9 = 0

Hence, the equation is 2x - 3y + 9 = 0

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first make a substitution and then use integration by parts to evaluate the integral. 0 ecos(t) sin(2t) dt

Answers

In this case, the integrand is evaluated at the bounds of the integral, both integrals.

We can make the substitution u = cos(t) and du = -sin(t) dt.

The integral becomes: ∫0 ecos(t)sin(2t) dt = -∫0 eu * sin(2arcsin(u)) du

Now we can use integration by parts, letting dv = eu and u = sin(2arcsin(u)), so v = -e * arcsin(u).

The integral becomes: ∫0 ecos(t)sin(2t) dt = [-e * arcsin(u) * sin(2arcsin(u))]0 - ∫0 e * arcsin(u) * cos(2arcsin(u)) du

Using the identity sin(2θ) = 2sin(θ)cos(θ), we can simplify the first term to:

∫0 ecos(t)sin(2t) dt = [2e * arcsin(u) * sin(arcsin(u))cos(arcsin(u))]0 - ∫0 e * arcsin(u) * cos(2arcsin(u)) du

Since u = cos(t), we can write the first term as: ∫0 ecos(t)sin(2t) dt = [2e * arcsin(cos(t)) * sin(t)cos(t)]0 - ∫0 e * arcsin(cos(t)) * cos(2arcsin(cos(t))) du

The first term is equal to 0 since it is evaluated at the bounds of the integral. The second term can be simplified using the identity cos(2θ) = cos^2(θ) - sin²(θ), so: ∫0 ecos(t)sin(2t) dt = -∫0 e * arcsin(cos(t)) * (cos^2(arcsin(cos(t))) - sin^2(arcsin(cos(t)))) du

Using the trigonometric identities sin^2(θ) + cos²(θ) = 1 and cos²(θ) = 1 - sin²(θ), we can simplify the integrand to: ∫0 ecos(t)sin(2t) dt = -∫0 e * arcsin(cos(t)) * (1 - 2sin²(arcsin(cos(t)))) du

Since the integrand is separable, we can rewrite it as: ∫0 ecos(t)sin(2t) dt = -∫0 e * arcsin(cos(t))du - 2∫0 e * sin²(arcsin(cos(t))) du

The first integral is straightforward to evaluate, giving us:

∫0 ecos(t)sin(2t) dt = -e * arcsin(cos(t)) |0

The second integral is a bit more complicated, but we can use the identity sin²(θ) = (1 - cos(2θ)) / 2, so:

∫0 ecos(t)sin(2t) dt = -e * arcsin(cos(t)) |0 - e * (1 - cos(2arcsin(cos(t)))) / 2 |0

Thus, the integrand is evaluated at the bounds of the integral, both integrals.

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