Can you please help me with this please.... I’ve been posting these questions over and over and nothing...

Snorkel, mask, and flippers
Slope:

Snorkel, mask, and flippers
y-intercept:

Snorkel, mask, and flippers
Slope intercept form:

Answer:

-3/2

Step-by-step explanation:

use slope formula

y1-y2/x1-x2

Answer:

.6

Step-by-step explanation:

Answer:

18/5, 3 3/5

Step-by-step explanation:

Answer: D

Step-by-step explanation:

Irrational numbers cannot be expressed as a ratio of two integers.

Answer:

D only

Step-by-step explanation:

2-1. a) The shear stress τ is constant across the flow. b) The velocity is maximum at the center (r = 0) and decreases linearly as the radial distance increases. c)v_max = (P₁ - P₂) / (4μL) * \(R^{2}\) and v_avg = (1 / (π(\(R^{2} -a^{2}\)))) * ∫[a to R] v * 2πr dr 2-2.a) The shear stress is constant for parallel plates. b) The velocity profile shows that the velocity is maximum at the centerline and decreases parabolically .c)v_max = (P₁ - P₂) / (2μh) and v_avg = (1 / (2h)) * ∫[-h to h] v dr.

2-1. Flow in an annular region between concentric cylinders:

(a) Shear stress profile:

In an incompressible fluid flow between concentric cylinders, the shear stress τ varies with radial distance r. The shear stress profile can be obtained using the Navier-Stokes equation:

τ = μ(dv/dr)

where τ is the shear stress, μ is the dynamic viscosity, v is the velocity of the fluid, and r is the radial distance.

Since the flow is at steady state, the velocity profile is independent of time. Therefore, dv/dr = 0, and the shear stress τ is constant across the flow.

(b) Velocity profile:

To determine the velocity profile in the annular region, we can use the Hagen-Poiseuille equation for flow between concentric cylinders:

v = (P₁ - P₂) / (4μL) * (\(R^{2} -r^{2}\))

where v is the velocity of the fluid, P₁ and P₂ are the pressures at the outer and inner cylinders respectively, μ is the dynamic viscosity, L is the length of the cylinders, R is the outer radius, and r is the radial distance.

The velocity profile shows that the velocity is maximum at the center (r = 0) and decreases linearly as the radial distance increases, reaching zero at the outer cylinder (r = R).

(c) Maximum and average velocities:

The maximum velocity occurs at the center (r = 0) and is given by:

v_max = (P₁ - P₂) / (4μL) * \(R^{2}\)

The average velocity can be obtained by integrating the velocity profile and dividing by the cross-sectional area:

v_avg = (1 / (π(\(R^{2} -a^{2}\)))) * ∫[a to R] v * 2πr dr

where a is the inner radius of the annular region.

2-2. The flow between parallel plates:

(a) Shear stress profile:

For flow between very wide or broad parallel plates, the shear stress profile can be obtained using the Navier-Stokes equation as mentioned in problem 2-1. The shear stress τ is constant across the flow.

(b) Velocity profile:

The velocity profile for flow between parallel plates can be obtained using the Hagen-Poiseuille equation, modified for this geometry:

v = (P₁ - P₂) / (2μh) * (1 - (\(r^{2} /h^{2}\)))

where v is the velocity of the fluid, P₁ and P₂ are the pressures at the top and bottom plates respectively, μ is the dynamic viscosity, h is the distance between the plates, and r is the radial distance from the centerline.

The velocity profile shows that the velocity is maximum at the centerline (r = 0) and decreases parabolically as the radial distance increases, reaching zero at the plates (r = ±h).

(c) Maximum and average velocities:

The maximum velocity occurs at the centerline (r = 0) and is given by:

v_max = (P₁ - P₂) / (2μh)

The average velocity can be obtained by integrating the velocity profile and dividing by the distance between the plates:

v_avg = (1 / (2h)) * ∫[-h to h] v dr

These formulas can be used to calculate the shear stress profile, velocity profile, and maximum/average velocities for the given geometries.

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Answer:

y = -x + 12

Step-by-step explanation:

2x + 2y = 24

divide all by 2

x + y = 12

y = -x + 12

Answer:

I = 32

Step-by-step explanation:

4.48 divided by .14 = 32

Brian will have £2340 in his bank account after 6 years with 5% simple interest.

To calculate the amount Brian will have after 6 years with simple interest, we can use the formula:

A = P(1 + rt)

Where:

A is the final amount

P is the principal amount (initial investment)

r is the interest rate per period

t is the number of periods

In this case, Brian invested £1800, the interest rate is 5% per year, and he invested for 6 years.

Substituting these values into the formula, we have:

A = £1800(1 + 0.05 * 6)

A = £1800(1 + 0.3)

A = £1800(1.3)

A = £2340

Therefore, Brian will have £2340 in his bank account after 6 years with 5% simple interest.

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Answer:

A closed circle on -4, going to the right.

Step-by-step explanation:

15x ≥ −60

/15     /15

x ≥ -4

This is a closed circle on -4, going to the right.

Hope that helps!

The answer is y = 5.

To solve this problem, we need to use the concept of direct variation. Direct variation is a mathematical relationship between two variables where one variable is a constant multiple of the other.

In this problem, we are given that y varies directly with x. We are also given a specific value of y and x, which allows us to find the constant of variation k. We can set up an equation using the given values:

y = kx

-7 = k(-28)

Solving for k, we get:

k = 1/4

Now that we know the value of k, we can use the equation y = kx to find y when x = 20:

y = (1/4)(20)

y = 5

Therefore, the answer is y = 5.

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The students of Ace College found a nearly perfect positive correlation between two variables in their research study. The nearly perfect positive correlation suggests that the two variables are closely related and move in sync with each other.

In their research study, the students of Ace College discovered a nearly perfect positive correlation between the two variables they were investigating. The coefficient of correlation they arrived at is known as the Pearson correlation coefficient, which measures the strength and direction of the linear relationship between two variables.

The Pearson correlation coefficient ranges from -1 to +1, where -1 represents a perfect negative correlation, +1 represents a perfect positive correlation, and 0 represents no correlation. Since the students found a nearly perfect positive correlation, the coefficient of correlation would be close to +1.

This indicates a strong and direct relationship between the variables, meaning that as one variable increases, the other variable also tends to increase consistently. The nearly perfect positive correlation suggests that the two variables are closely related and move in sync with each other.

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The null hypothesis represents the default assumption or the status quo, while the alternative hypothesis represents the alternative possibility or the hypothesis that is being tested.

These two hypotheses are mutually exclusive, meaning that if one is true, the other must be false.

The null and alternative hypotheses divide all possibilities into two non-overlapping sets.

In statistical hypothesis testing, the null and alternative hypotheses divide all possibilities into two non-overlapping sets.

These two hypotheses represent different explanations or theories about the data, and they are used to make inferences about the population from the sample data.

The null hypothesis represents the default assumption or the status quo. It states that there is no significant difference or relationship between two variables, or that the observed data is due to random chance alone. The alternative hypothesis, on the other hand, represents an alternative explanation or theory about the data.

It states that there is a significant difference or relationship between two variables, or that the observed data is not due to random chance alone.

The null and alternative hypotheses are mutually exclusive, meaning that if one hypothesis is true, the other hypothesis must be false.

They are also exhaustive, meaning that they cover all possible explanations for the observed data.

By dividing all possibilities into two non-overlapping sets, the null and alternative hypotheses allow us to make a decision about which hypothesis is more likely to be true based on the evidence provided by the sample data.

In order to test the null and alternative hypotheses, we use statistical methods to calculate the probability of obtaining the observed data if the null hypothesis were true.

This probability is called the p-value, and it represents the likelihood of obtaining the observed data or a more extreme result if there were no true effect or relationship in the population.

If the p-value is small enough, we reject the null hypothesis in favor of the alternative hypothesis.

The null and alternative hypotheses divide all possibilities into two non-overlapping sets and provide a framework for making inferences about the population based on sample data.

By testing the null hypothesis and calculating the p-value, we can make decisions about which hypothesis is more likely to be true based on the evidence provided by the sample data.

In statistical hypothesis testing, we use evidence from the data to decide whether to reject the null hypothesis in favor of the alternative hypothesis or not.

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The correct option is option (a) $3,992.50. Pavi currently has a $3,992.50 credit on her current card.

The calculation of the provided data, according to the question, is as follows:

$8000 is the credit limit on the card.

Paid in Full = $2,500

$1,500 has been credited to the account.

The value of recent purchases made by Pavi is $3,000

Applied finance charges equal $7.50

The card's current balance is equal to $4,007.50.

Using the formula below, we can now determine the amount of credit that is now available on the card:

The credit line on the card = Available Credit - New Balance

By entering values into the formula provided, we obtain

Credit available on the current card: $8,000 - $4,007.50= $3,992.50.

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Answer:

See below

Step-by-step explanation:

3 * 3 = 9 obviously

a negative number times a negative number equals a positive number

  so   -3  * -3 = + 9

Answer: 378/9=42

so 42 miles per gallon and 210/42= 5

5 gallon

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

the graphs are very fuzzy and therefore hard to read.

but I think I could see enough to make the right choice.

the solution (-3/2, 0) means that this point is the crossing point of both lines (the point or value of x, where both functions deliver the same result or y value).

and that eliminates C and D right away, as the crossing points there have positive x values. that does not fit to our -3/2 x value.

between A and B the right answer is B (-1.5 = -3/2).

The solution to the equation 55r = 1925 is r = 35.

To solve the equation 55r = 1925 using the fundamental principle of equality, we want to find the value of r that satisfies the equation.

Dividing both sides of the equation by 55, we have:

r = 1925 / 55

Simplifying the division, we get:

r = 35

Therefore, the solution to the equation 55r = 1925 is r = 35.

To check our solution, we substitute r = 35 back into the original equation:

55 * 35 = 1925

1925 = 1925

Since both sides of the equation are equal, we can conclude that the solution r = 35 is correct.

The fundamental principle of equality states that if two expressions are equal, then any operation performed on one side must also be performed on the other side in order to maintain the equality. In this case, we divided both sides of the equation by 55 to isolate the variable r. By simplifying the division, we found that the value of r that satisfies the equation is 35. To verify our solution, we substituted it back into the original equation and confirmed that it holds true.

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Answer:

The answer is 25%

Step-by-step explanation:

on the first year lets say town A and town B had a population of 100 (a town wouldn't have only 100 people but for simplicity lets do 100).

town A's population increases by 60%, 60% of 100 is 60, 100 + 60 = 160

town B's population decreases by 60%, 100 - 60 = 40

so now we have town A's population after 10 years and town B's population after 10 years, 160 divided by 40 = 4, and 100 divided by 4 equals 25, so the answer is 25%.

Answer:

4.69 inches (2 decimal places)

Step-by-step explanation:

Refer to image attached to this answer:

Using Pythagoras Theorem:

\(AB^2+AC^2=BC^2\)

\(2^2+3^2=BC^2\)

\(4+9=BC^2\)

\(BC^2=13\)

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

Using Pythagoras Theorem,

\(BC^2+CD^2=BD^2\ (x)\)

\(13+3^2=BD^2\)

\(13+9=BD^2\)

\(BD=\sqrt{22} = 4.69\ (2d.p.)\)

First, we have to find the last remaining side of the leftmost triangle.

We can use the Pythagorean theorem.

The Pythagorean theorem: a^2 + b^2 = c^2

a = one leg

b = the second leg

c = the hypotenuse

In this problem,

a = 3

b = 2

c = ?

Let's plug our numbers into the Pythagorean theorem.

3^2 + 2^2 = c^2

Simplify the left side

9 + 4 = c^2

Add together like terms

13 = c^2

Take the square root of both sides

\(\sqrt{13}\) = c

Now we can use the Pythagorean theorem on the rightmost triangle to find x.

a = 3

b = \(\sqrt{13}\)

c = x

let's plug our values into the Pythagorean theorem.

3^2 + (\(\sqrt{13}\))^2 = (x)^2

Simplify the left side

9 + 13 = x^2

Add together like terms

22 = x^2

Take the square root of both sides

\(\sqrt{22}\) = x

But the problem is asking for the approximate value, the approximate value of \(\sqrt{22}\) = 4.69 in

Answer:

1/9

Step-by-step explanation:

Let's take a pizza, for example. Let's say it has 9 slices in total, and you eat only one slice. That leaves 8 remaining. Therefore the majority of the original pizza is still remaining, because you only ate 1 slice. If you ate 1/2 tho, you would have eaten 4 & 1/2 slices, and so on and so forth for the rest of the fractions, making 1/9 the smallest fraction

Answer:

it would be honestly idj

Step-by-step explanation:

im tryin to get point

it a or d make your decision

Answer:

Alcohol

Step-by-step explanation:

Alcohol would be more suitable for making measurements in a -60 degree laboratory, since its boiling point is 78 degrees and its freezing point is -80 degrees, meaning alcohol will not freeze in a -60 degree environment.

Mercury on the other hand, has a freezing point of -39. Thus, it will freeze in a -60 degree environment, making it not suitable for use in this laboratory.

The reciprocal (inverse or indirect quote) for the given exchange rates is as follows:

USO/DKK: The reciprocal exchange rate is 0.1557 DKK/USO.

GBP/NZD: The reciprocal exchange rate is 0.4898 NZD/GBP.

USO/INR: The reciprocal exchange rate is 0.0226 INR/USO.

To calculate the reciprocal quote, we take the reciprocal of the given exchange rate. For example, for USO/DKK with an exchange rate of 6.4270 DKK per USO, the reciprocal is 1 divided by 6.4270, which equals 0.1557 DKK per USO.

Similarly, for GBP/NZD with an exchange rate of 2.0397 NZD per GBP, the reciprocal is 1 divided by 2.0397, which equals 0.4898 NZD per GBP.

Finally, for USO/INR with an exchange rate of 44.333 INR per USO, the reciprocal is 1 divided by 44.333, which equals 0.0226 INR per USO.

These reciprocal quotes represent the inverse of the original exchange rates.

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Complete question: Calculate the reciprocal (inverse or indirect quote) for the following currency pairs:
1. USO/DKK: 1/6.4270 or DKK/USO: 1/350
2. GBP/NZD: 1/2.0397 or NZD/GBP: 1/0.7000
3. USO/INR: 1/44.333 or INR/USO: 1/44.333

Answer:

Alex has 3x dollars and an extra 15 dollars in his coat pocket. He buys a new Nike shoe for 84 dollars. How much money did Alex spend that was not in his pocket.

Step-by-step explanation:

Answer:

Part A: Word problem

Maria went to the store and purchased some books for her book club. Each book cost $3, and she also bought some bookmarks at $15 each. Maria's total purchase, including tax, amounted to $84. If Maria bought x books, write an equation to represent the situation.

Part B: Solution

To solve the equation 3x + 15 = 84, we need to isolate the variable x on one side of the equation.

Step 1: Subtract 15 from both sides of the equation to eliminate the constant term on the left side:

3x + 15 - 15 = 84 - 15

3x = 69

Step 2: Divide both sides of the equation by 3 to isolate x:

3x/3 = 69/3

x = 23

So, the solution to the equation is x = 23.

Part C: Explanation

In the given equation 3x + 15 = 84, the variable x represents the number of books Maria purchased. The equation states that the cost of x books at $3 each, represented by 3x, plus the cost of $15 for bookmarks, totals to $84. Thus, the value of x represents the number of books Maria bought in this scenario. In the solution, x = 23, it means Maria purchased 23 books for her book club.

Step-by-step explanation:

Answer:

The answer is 72

Step by step Explanation:

You add 62 + 78 + 59 + 89

And it equals 288

Then divide that answer by 4

And the answer is 72

There are 33.814 fluid ounces in a liter, in unit of measurement.

A unit of measurement is a predetermined, acknowledged by law, and frequently used magnitude of a quantity that acts as a standard for evaluating other quantities of the same kind. A multiple of the measurement unit can be used to express any additional quantity of that type.

An example of a physical quantity is length. The word "metre" is a measurement that stands in for a particular, predetermined length, and it begins with the letter "M." A length is 10 times the precise, predetermined length known as "metre" when the term "10 metres" is used (or 10 m).

Human endeavour has relied on the definition, acceptance, and practical application of units of measurement from antiquity to the present.

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Answer:

Slope: -1/16

Step-by-step explanation:

12-8= 4

-39-25= -64

4/-64 = -1/16

The required slope of the line that passes through the points (25, 8) and (-39, 12) is m = -1/16.

The slope of the line is a tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.

Here,
The slope of the line that passes through the points (25, 8) and (-39, 12) given as

m = (y₂ - y₁) / (x₂ - x₁)

m = 12 - 8 / -39 - 25
m = 4 / -64
m = -1/16

Thus, the slope of the line that passes through the points (25, 8) and (-39, 12) is m = -1/16.

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Answer:

I think it’s p(t)=10t-400

Answer:

t(p) = 10p-400

Step-by-step explanation: