13х - 7y + 4х
Please explain and awnser it’s for a test!

Answer:

Paul should be wearing a light jacket appropriate for about 59 F or 15 °C

Step-by-step explanation:

If it is 4:00 a.m. in Honolulu when it is 2:00 p.m. in London, then the difference between times is:

\(d=14-4\\d=10\ hours\)

London is 10 hours ahead of Honolulu.

If Paul left Honolulu at 12:00 p.m, the corresponding time in London was:

\(t=12+10\\t=22 = 10:00\ p.m.\)

Since he arrived in London at 1:00 p.m. at Friday, the flight time was:

\(F= (24-22)+13\\F=15\ hours\)

The flight took 15 hours in total. If the temperature was 30°C when he boarded the flight and it decreases at a rate of 1°C per hour, the temperature when Paul arrives in London is:

\(T=30-(15*1)\\T=15^oC\)

Converting it to Fahrenheit

\(T=(15*\frac{9}{5})+32 \\T=59\ F\)

Paul should be wearing a light jacket appropriate for about 59 F or 15 °C

Answer:

d

Step-by-step explanation:

A beneficial feature of a nature preserve is that it d. have areas that allow organisms to move between preserves. A nature preserve is a protected area that is dedicated to the conservation of natural resources such as plants, animals, and their habitats.

It plays a crucial role in maintaining biodiversity and ecological balance. The size or shape of a nature preserve is not the only determining factor of its effectiveness.
Large preserves may protect more species and allow for larger populations to thrive, but small preserves can still be effective in protecting rare or threatened species. Linear and circular preserves can be beneficial in different ways depending on the specific goals of conservation.
However, the most important aspect of a nature preserve is the ability for organisms to move between them. This allows for genetic diversity, prevents inbreeding, and helps populations adapt to changing environmental conditions. This movement can occur through corridors or connections between preserves, which can be natural or man-made.
In summary, while size and shape can have some impact on the effectiveness of a nature preserve, the ability for organisms to move between them is the most beneficial feature.

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Hey there!

7 5/8

= 7 * 8 + 5 / 8

= 56 + 5 / 8

= 61 / 8

= 61 ÷ 8

= 7.625

Reciprocal form for fraction is basically the bottom number switched from the top number

Therefore, your answer is: 7 8/5

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

The solutions for the system of equations given by Substitution method is (27, 114), (-0.25, -5.625), (0, -3) and (0, -2).

Linear equations involve one or more expressions including variables and constants and the highest exponent of the variable is 1.

System of linear equations involve two or more linear equations.

1) -4x + y = 6

5x - y = 21

We are using Substitution Method.

From, -4x + y = 6, we get, y = 4x + 6

Substituting y = 4x + 6 in the equation 5x - y = 21, we get,

5x - (4x + 6) = 21

5x - 4x - 6 = 21

x = 27

So, y = 4x + 6 = 114

2) -7x - 2y = 13

x - 2y = 11 ⇒ x = 2y + 11

Substituting x = 2y + 11 in the first equation -7x - 2y = 13,

-7(2y + 11) - 2y = 13

-14y - 77 - 2y = 13

-16y = 90

y = -5.625

So, x = 2y + 11 = -0.25

3) -5x + y = -3 ⇒ y = 5x - 3

3x - 8y = 24

Substituting y = 5x - 3 in the second equation 3x - 8y = 24,

3x - 8(5x - 3) = 24

3x - 40x + 24 = 24

x = 0

y = 5x - 3 = -3

4) -5x + y = -2 ⇒ y = 5x - 2

-3x + 6y = -12

Substituting y = 5x - 2 in the second equation -3x + 6y = -12,

-3x + 6 (5x - 2) = -12

-3x + 30x - 12 = -12

x = 0

So, y = 5x - 2 = -2

Hence the system of equations are solved.

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The cost of materials for the cheapest container is $184.67.

Suppose the width is x and it is given that the length of its base is twice the width, so the length of the base is 2x.

The base area is 2x².

Since the volume is $12m³

The height has to be 12/ 2x² = 6/ x²

The cost of making such a container is.

cost of base = 2x² × 10

= 20x²

The cost of sides =( 2 × 2x 6/x² + 2 × x × 6 / x²) 6

= (24/x + 12/x )6

= 36/x × 6

216/x

The overall cost is hence the sum of the base and the sides = f(x)

= 20x² + 216/x

To get the minimum,

df(x) / dx = 20x² + 216/x = 0

= 40x - 216/x² = 0

x³ = 216/40

= 54/10

= 27/5

x = 3/∛5

= 3/ 1.70

= 1.76

f(x) = 20(1.76)² + 216/ 1.76

= 61.952 + 122.72

= 184.67

Therefore we get the cost of the materials to be $184.67.

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The reason that makes mobile banking somewhat less secure than regular online banking is given by: Option B: Mobile devices can be lost or stolen more easily than a computer, such as a laptop.

Mobile banking is doing transaction and bank related works through mobile apps.

Online banking refers to internet banking, usually done through websites of banks. Usually, user uses this type of banking in desktops, rather than mobiles as for mobiles, there are apps already available which are more convenient than websites.

Option A is not correct as there is almost same security for both types of banking.

Option C is not correct as this third party information access can be done for both mobile and online banking if the security is weak, else none of them will be affected.

Option D: Mostly, banking apps do not store crucial informations in memory, and if they do so,then they are protected and no other app can use it., so this option is incorrect.

Option B is somewhat correct as mobiles can be lost or stolen easily. The hacker can then use that device to steal the data if the security is weak. But, even if the security is tight, the situation when your mobile with banking information is in hands of an unethical hacker is somewhat risky.

Thus, the reason that makes mobile banking somewhat less secure than regular online banking is given by: Option B: Mobile devices can be lost or stolen more easily than a computer, such as a laptop.

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Answer:

The slope is -1/2, or -0.5.

Step-by-step explanation:

Using the formula m = (y2 - y1)/(x2 - x1), you can find the slope of the equation.

In this case, you would plug in your values as m=(-1-4)/(7-(-3))
Then simplify to m = -5/-10
Then reduce the fraction to -1/2, or -0.5

Answer:

n=38/3

Step-by-step explanation:

4*(n-10)=(n-2)

4*(n-10)=n-2

4n-40=n-2

3n-40=-2

3n=38

n=38/3

Step-by-step explanation:

82=−3(−4a+3)−5

Step 1: Simplify both sides of the equation.

82=−3(−4a+3)−5

82=(−3)(−4a)+(−3)(3)+−5 (Distribute)

82=12a+−9+−5

82=(12a)+(−9+−5) (Combine Like Terms)

82=12a+−14

82=12a−14

Step 2: Flip the equation.

12a−14=82

Step 3: Add 14 to both sides.

12a−14+14=82+14

12a=96

Step 4: Divide both sides by 12.

\(\frac{12a}{12} = \frac{96}{12}\)

a=8

There are 25 houseplants that are full-grown and 15 houseplants that are seedlings in the plant store. You want to know the likelihood that a plant that is bought for a friend is a full-grown houseplant.

The probability that a randomly selected plant will be a full-grown houseplant can be calculated by dividing the number of full-grown houseplants by the number of total houseplants.

Therefore, the probability of choosing a full-grown houseplant is 25/(25 + 15) = 5/8 = 0.625 or 62.5%.

The probability that a plant is a houseplant is 25 + 15 = 40.

The probability that a plant is an outdoor plant is 25 + 30 = 55.

Since there are a total of 40 houseplants and 25 are full-grown, the probability of choosing a full-grown houseplant is 25/40 or 5/8, which can be simplified to 0.625 or 62.5%.

Therefore, the chance that the plant you are buying for your friend is a full-grown houseplant is 62.5%.

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Step 1: Simplify both sides of the equation.

3+3y=1−13y−9

3+3y=1+−13y+−9

3y+3=(−13y)+(1+−9)(Combine Like Terms)

3y+3=−13y+−8

3y+3=−13y−8

Step 2: Add 13y to both sides.

3y+3+13y=−13y−8+13y

16y+3=−8

Step 3: Subtract 3 from both sides.

16y+3−3=−8−3

16y=−11

Step 4: Divide both sides by 16.

16y

16=−11/16

y=−11/16

Answer:

y=−11/16

It is difficult to definitively determine if they have domain restrictions.

If both functions have the same degree (highest power of x) and the leading coefficients (coefficients of the highest power terms) are also the same, then their end behavior will be the same.

However, if either the degrees or the leading coefficients differ, the end behavior will be different, making the statement false.

For example, if f(x) contains a square root term, then the domain will be restricted to non-negative values of x. Similarly, if g(x) contains a denominator, the domain will be restricted to exclude values of x that make the denominator zero.

However, without specific information about the functions f(x) and g(x), it is difficult to definitively determine if they have domain restrictions.

To determine the truthfulness of this statement, we need the specific values of x1 and x2 and the functional forms of f(x). Without this information, we cannot determine if the statement is true or false.

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In order to change certain concrete qualities, materials are referred to as additives throughout the mixing process.

There are two types of admixtures: chemical and mineral.

Chemical admixtures are substances that are added to the concrete mix in small quantities to achieve specific properties.

They can improve the workability of the concrete, reduce water content, increase strength, or control the setting time.

Examples of chemical admixtures include water-reducing admixtures, air-entraining admixtures.

Mineral admixtures, on the other hand, are fine materials that are added to the concrete mix as a partial replacement of cement.

They can enhance the workability, durability, and strength of the concrete. Common mineral admixtures include fly ash, silica fume, and ground granulated blast furnace .

b) Corrosion in concrete occurs when the reinforcing steel inside the concrete is exposed to oxygen and moisture, leading to the formation of rust.

This can weaken the structure and reduce its lifespan. The mechanism of corrosion involves a series of electrochemical reactions.

First, the steel acts as the anode, and oxygen and water react to form hydroxyl ions. Then, the hydroxyl ions combine with iron ions from the steel to form iron hydroxide, which further reacts with carbon dioxide from the air to form iron carbonate, commonly known as rust.

To protect against corrosion, various methods can be employed. These include:

1. Coating:

Applying a protective coating, such as paint or epoxy, to the steel surface to prevent contact with oxygen and moisture.

2. Cathodic Protection:

Creating an electrical circuit that supplies a protective current to the steel, effectively stopping the electrochemical reactions that cause corrosion.

3. Use of Corrosion Inhibitors:

Adding chemicals to the concrete mix or applying them to the surface of the structure to reduce the corrosion rate.

4. Proper Concrete Mix Design:

Designing the concrete mix with low permeability and the correct water-cement ratio to minimize the ingress of moisture and oxygen.

5. Adequate Concrete Cover:

Ensuring a sufficient thickness of concrete cover over the steel reinforcement to protect it from exposure.

These corrosion protection methods help to prolong the lifespan and maintain the structural integrity of concrete structures.

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a) Admixtures in concrete enhance its performance and properties. Chemical admixtures modify concrete properties, while mineral admixtures enhance specific properties as cement replacements.

b) Corrosion is an electrochemical process where metal deteriorates due to oxygen, moisture, and contaminants. Corrosion protection methods include coatings, corrosion-resistant materials, cathodic protection, and proper design.

In order to change certain concrete qualities, materials are referred to as additives throughout the mixing process.

There are two types of admixtures: chemical and mineral.

Chemical admixtures are substances that are added to the concrete mix in small quantities to achieve specific properties.

They can improve the workability of the concrete, reduce water content, increase strength, or control the setting time.

Examples of chemical admixtures include water-reducing admixtures, air-entraining admixtures.

Mineral admixtures, on the other hand, are fine materials that are added to the concrete mix as a partial replacement of cement.

They can enhance the workability, durability, and strength of the concrete. Common mineral admixtures include fly ash, silica fume, and ground granulated blast furnace .

b) Corrosion in concrete occurs when the reinforcing steel inside the concrete is exposed to oxygen and moisture, leading to the formation of rust.

This can weaken the structure and reduce its lifespan. The mechanism of corrosion involves a series of electrochemical reactions.

First, the steel acts as the anode, and oxygen and water react to form hydroxyl ions. Then, the hydroxyl ions combine with iron ions from the steel to form iron hydroxide, which further reacts with carbon dioxide from the air to form iron carbonate, commonly known as rust.

To protect against corrosion, various methods can be employed. These include:

1. Coating:

Applying a protective coating, such as paint or epoxy, to the steel surface to prevent contact with oxygen and moisture.

2. Cathodic Protection:

Creating an electrical circuit that supplies a protective current to the steel, effectively stopping the electrochemical reactions that cause corrosion.

3. Use of Corrosion Inhibitors:

Adding chemicals to the concrete mix or applying them to the surface of the structure to reduce the corrosion rate.

4. Proper Concrete Mix Design:

Designing the concrete mix with low permeability and the correct water-cement ratio to minimize the ingress of moisture and oxygen.

5. Adequate Concrete Cover:

Ensuring a sufficient thickness of concrete cover over the steel reinforcement to protect it from exposure.

These corrosion protection methods help to prolong the lifespan and maintain the structural integrity of concrete structures.

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Answer:

a : 2 , b : 1 , c : 0 , d : 0

Step-by-step explanation:

a: 2

b: 1

c: 0

d:0

Answer:

d .

Step-by-step explanation:

I went over it in class .

Answer:

\(\begin{array}{ccc}cause&accidents&frequency\\pilot\ error&581&0.253\\human\ error&56&0.024\\weather&579&0.252\\mechanical&555&0.242\\sabotage&526&0.229\end{array}\)

Pilot error, better training of pilots may reduce accidents.

Step-by-step explanation:

The total number of crashes is:

\(n = 581+56+579+555+526\\n=2297\ crashes\)

The relative frequency is given by the number of accidents caused by each factor divided by the total number of accidents. The relative frequency distribution is:

\(\begin{array}{ccc}cause&accidents&frequency\\pilot\ error&581&0.253\\human\ error&56&0.024\\weather&579&0.252\\mechanical&555&0.242\\sabotage&526&0.229\end{array}\)

The most serious threat to aviation​ safety is pilot error, a better training of current and future pilots could be a solution to reduce accidents.

Answer:

57.5%

Step-by-step explanation:

23 of the 40 trees are not pine trees.

23/40 = .575 = 57.5%

a) The Selling price at a markup of $4.35 on the bag of corn chips is $6.25 b) The Net profit a markup of $4.35 on the bag of corn chips is $3.10 c) The cost at a markup of $4.35 on the bag of corn chips is $1.90.

We can use the following equations to solve for the selling price, net profit, and cost of the corn chips:

(a) Selling price = cost + markup

(b) Net profit = selling price - cost - overhead

(c) Overhead = overhead percent x selling price

Given that the overhead is $1.25 and the overhead percent is 20%, we can calculate the selling price as follows:

Now that we know the selling price, we can use equation (a) to calculate the cost:

(a) Selling price = cost + markup

$6.25 = cost + $4.35

Cost = $6.25 - $4.35

Cost = $1.90

(b) Net profit = selling price - cost - overhead

Net profit = $6.25 - $1.90 - $1.25

Net profit = $3.10

(c) Overhead = overhead percent x selling price

$1.25 = 0.2 x selling price

Selling price = $1.25 / 0.2

Selling price = $6.25

Therefore, the selling price of the corn chips is $6.25, the net profit per bag is $3.10, and the cost is $1.90.

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the answer that you are looking for is C

The compound event probability of spinning an even number and flipping heads is P ( A ) = 1/4

Given data ,

Let the total number of outcomes in spinning a spinner be = 6

The number of even outcomes = 3

Let the number of outcomes in flipping a coin = 2

So , the probability of landing an even number = 3/6 = 1/2

The probability of landing a heads = 1/2

And , probability of spinning an even number and flipping heads is given by P ( A ) = probability of landing a heads x probability of landing an even number

On simplifying , we get

P ( A ) = 1/2 ( 1/2 )

P ( A ) = 1/4

Hence , the probability is 1/4 or 25 %

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The mean temperature in Cleveland, OH, was 64°F. The accumulated degree days for Cleveland on 6-7 September 2022 were 1. The rest of Ohio accumulated degree days during the same period.

Based on the given information, the maximum temperature in Cleveland was 70°F and the minimum temperature was 58°F. To find the mean temperature, we add the maximum and minimum temperatures and divide by 2: (70°F + 58°F) / 2 = 128°F / 2 = 64°F.

Degree days are a measure of heating or cooling requirements. In this case, since the mean temperature in Cleveland was lower than a certain base temperature, degree days were accumulated. The base temperature is typically set at 65°F for cooling and 55°F for heating. Since the mean temperature in Cleveland was below the base temperature, the accumulated degree days are heating degree days (HDD).

For the specific date of 6-7 September 2022, Cleveland accumulated 1 heating degree day (HDD). This means that the average temperature for that period was 1 degree below the base temperature of 55°F.

The remaining stations in Ohio also accumulated heating degree days (HDD) on 6-7 September 2022. This indicates that the temperatures across the rest of Ohio were below the base temperature during that period.

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Answer:

Step-by-step explanation:

To test the hypothesis that the moral awareness of girls is different from males, we need to conduct a two-tailed hypothesis test with a significance level of alpha = .1.

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data. It involves the use of methods and techniques to gather, summarize, and draw conclusions from data.

Null hypothesis: The population mean of moral awareness scores for girls is equal to the population mean of moral awareness scores for boys (μg = μb).

Alternative hypothesis: The population mean of moral awareness scores for girls is different from the population mean of moral awareness scores for boys (μg ≠ μb).

We will use a one-sample t-test to test this hypothesis since we have a sample mean and standard deviation and want to compare it to a known population mean.

First, we need to calculate the t-statistic:

t = (M - μ) / (s / √(n))

where M = 76 (sample mean), μ = 72 (population mean for males), s = 18 (population standard deviation for males), and n = 58 (sample size).

t = (76 - 72) / (18 / √(58)) = 1.59

Next, we need to determine the critical t-value using a t-distribution table with degrees of freedom (df) = n - 1 = 57 and a two-tailed test with

alpha = 1. The critical t-value is ±1.984.

Since our calculated t-value (1.59) falls within the range of -1.984 to 1.984, we fail to reject the null hypothesis.

Therefore, we do not have sufficient evidence to conclude that the moral awareness of girls is different from boys at a significance level of

alpha = .1.

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Answer:

Keynes argued that inadequate overall demand could lead to prolonged periods of high unemployment. But during a recession, strong forces often dampen demand as spending goes down

Step-by-step explanation:

Answer:

The domain is 15 ≤ x ≤ 25

Step-by-step explanation:

The given parameters are;

The number of hours Miguel works each week = Between 15 and 25 hours

The amount he is paid per hour = $12

Therefore, we have;

The domain is all real numbers, 'x', such that 15 ≤ x ≤ 25

The amount Miguel makes each week, 'y' is between; 12 × 15 ≤ A ≤ 12 × 25

Therefore the range is 180 ≤ y ≤ 300.

The required  numbers is x=12 and y=24−x=24−12=12 i.e.(12,12).

What is differentiation ?

In math, isolation is one of the two important generalities piecemeal from integration. Isolation is a system of chancing the outgrowth of a function. Isolation is a process, in Maths, where we find the immediate rate of change in function grounded on one of its variables. The most common illustration is the rate change of relegation with respect to time, called haste. The contrary of chancing a outgrowth isanti-differentiation.

still, also the rate of change of x with respect to y is given by dy/ dx, If x is a variable and y is another variable. This is the general expression of outgrowth of a function and is represented as f'( x) = dy/ dx, where y = f( x) is any function.

Let the two number is x and y

According to given question.

Sum of two number =24

x+y=24

Then, y=24−x.......(1)

Again, product

 P=maximum=x × y

P=x(24−x 2)

P=24x−24x^2  .......(2)

We know that,

For maximum value

dP/dx =0

Now differentiating equation (2) with respect to x and we get,

dP/dx  =24−2x

⇒ 24−2x=0

⇒ 2x=24

⇒x=12

Again, differentiating equation (2) with respect to x and we get,

\(\frac{d^2p}{dx^2} = -2 < 0\)

Then,P is minimum at point x=12

Hence, the required  numbers is x=12 and y=24−x=24−12=12 i.e.(12,12)

This is the solution.

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The answer to the given question is 220 ft depth at 2:16 pm. Here we have a depth of submersible at 2:16 pm.

A watercraft made to function underwater is submersible. The term "submersible" is frequently used to distinguish between submersibles and other underwater vessels known as submarines. A submersible is typically supported by a nearby surface vessel, platform, shore team, or occasionally a larger submarine, whereas a submarine is a fully self-sufficient craft capable of independent cruising with its own power supply and air renewal system.

At 2:16 p.m.= -180ft - 40ft = -220ft

So, the answer is 220 ft depth.

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