if hope has 4 more quarters than nickels and they have a combined value of 280 cents, how many of each coin does she have?

The Existence and Uniqueness Theorem states that if a system of linear equations has a unique solution, then the solution can be found by solving the associated augmented matrix.

To determine whether a system of linear equations has a unique solution, the number of equations must equal the number of unknowns. Additionally, the equations must not be linearly dependent. If these criteria are met, then the Existence and Uniqueness Theorem guarantees that there is exactly one unique solution.

To illustrate, consider the system of equations:

x1 + x2 - x3 = 2  

2x1 - x2 + 2x3 = 8

3x1 + 2x2 - 4x3 = 0

= 4. Therefore, the Existence and Uniqueness Theorem guarantees that there is exactly one unique solution for this system.

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Answer:

The 28 bananas weigh 7 pounds

Step-by-step explanation:

We can start by figuring out the price per banana by dividing the total price by the number of bananas:

Price per banana = $3 / 7 bananas

Price per banana = $0.43 per banana (rounded to the nearest cent)

Next, we can use the price per banana to find the cost of 28 bananas:

Cost of 28 bananas = 28 bananas x $0.43 per banana

Cost of 28 bananas = $12.04

Therefore, Luke pays $12.04 for 28 bananas.

To find the weight of 28 bananas, we can use the fact that seven bananas weigh 1 3/4 pounds:

Weight of one banana = 1 3/4 pounds / 7 bananas

Weight of one banana = 1/4 pound per banana

Then we can multiply the weight of one banana by 28 to find the total weight of 28 bananas:

Weight of 28 bananas = 1/4 pound per banana x 28 bananas

Weight of 28 bananas = 7 pounds

Therefore, the 28 bananas weigh 7 pounds.

The relation R is a partial order for the given set of data regarding over the set of people.  (Option 1)

A partial order is a binary relation that is reflexive, antisymmetric, and transitive. In this case, the relation R is reflexive since a person is always born before themselves. It is also transitive since if person A is born before person B, and person B is born before person C, then person A must be born before person C.

However, the relation R is not symmetric, since if person A is born before person B, then person B cannot be born before person A. Therefore, the relation R is not a total order.

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Complete Question:

in a relation r over a set of people, we have that a person x is related to person y if x's birth date is prior to y's birth date. no two people in the group have the same birth date. indicate the choice that correctly describes the relation r.

We can solve this equation by using  corresponding  angle relationship between A and B  , to get A= 56° and B=56°

What is corresponding  angle ?

In geometry, when two lines are intersected by a transversal, the angles formed at each intersection point are called the corresponding angles. Corresponding angles are angles that occupy the same relative position at each intersection point where the transversal intersects two parallel lines.

What is equation?

In mathematics, an equation is a statement that shows the equality between two mathematical expressions using an equals sign (=). An equation can contain variables (represented by letters) and constants (fixed values).

In the given question,

The corresponding angle relationship between angle A and angle B can be represented by the equation:

angle A = angle B

Substituting the given values of angle A and B we get

4x = 2(x+14)

4x = 2x + 28

2x = 28

x = 14

Therefore angle A = 4x = 4(14) = 56°

Therefore angle B = 2(x+14) = 2(14+14) = 56°

So both angle A and B have a measure of 56°.

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The probability that exactly 8 of the 19 people in the random sample are employed is 27.93%.

We need to calculate the probability that exactly 8 of the 19 people in the random sample are employed. The probability of a single person being employed is 4%, or 0.04.

To calculate the probability of 8 people being employed out of the 19, we can use the binomial distribution formula:

P(X=8) = nCx * (p^x) * (1-p)^(n-x) Where n = 19, x = 8, p = 0.04, and 1-p = 0.96

So, P(X=8) = 19C8 * (0.04^8) * (0.96^11) = 0.2793 or 27.93%.

Therefore, the probability that exactly 8 of the 19 people in the random sample are employed is 27.93%.

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The domain of the function is: Domain = {-8, -6, -4, -2, 1, 2} and  range of the function is :- Range = {-8, -6, -4, -2, 0}.

A function is a rule that maps each element in one set, called the domain, to a unique element in another set, called the range.

It is a relation between two sets where each input in the domain corresponds to a unique output in the range.

Functions are often represented by equations, graphs, or tables, and they are used to model real-world phenomena and solve mathematical problems in various fields such as science, engineering, economics, and more.

The domain of the function is the set of all possible input values, which in this case are the x-coordinates of the given points on the graph. So, the domain is:

Domain = {-8, -6, -4, -2, 1, 2}

The range of the function is the set of all possible output values, which in this case are the y-coordinates of the given points on the graph. So, the range is:

Range = {-8, -6, -4, -2, 0}

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Thus, the area of triangular region BCE is √(1/2) / 2.

The area of triangular region BCE can be found using the formula for the area of a triangle: (1/2) * base * height. In this case, the base of triangle BCE is equal to the side length of square ABCD, which is 1. To find the height, observe that triangle BEC is a right triangle with right angle at vertex B.
Since the length of line segment BE is equal to the length of line segment DE, and CE has a length of 1, we can deduce that triangle BED is an isosceles right triangle. Therefore, the angle BEC is 45 degrees, and the angle BED is also 45 degrees.
Using the Pythagorean theorem on triangle BED, we have:
[tex]BE^2 + DE^2 = CE^2[/tex]
Since BE = DE, we can rewrite the equation as:
[tex]2(BE^2) = 1[/tex]
[tex]BE^2 = 1/2[/tex]
[tex]BE = √(1/2)[/tex]
Now that we know the length of BE, we can use it as the height of triangle BCE. Therefore, the area of triangle BCE is:
Area = (1/2) * base * height
[tex]Area = (1/2) * 1 * √(1/2)[/tex]
[tex]Area = √(1/2) / 2[/tex]

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Answer:

(9x10^4)+(7x10) = 90,000 + 70 = 90,070

Answer:

Step-by-step explanation:

You want to know the dimensions of a cuboid cereal box with volume 975 cm³ that is 3 times as wide as deep, and 2 cm shorter than wide.

Let x represent the depth of the box. Then the width is 3 times that, or 3x. The length is 2 cm less than the width, so is (3x -2). The volume is the product of these dimensions.

  V = DWL

  975 = x(3x)(3x -2)

We like to graph an equation like this in the form ...

  f(x) = 0

so the solution is the x-intercept of the graph of f(x). Subtracting 975 puts the equation in that form:

  x(3x)(3x -2) -975 = 0

The attachment shows the graph of x(3x)(3x -2), and that it has its only real solution at x=5. This means the dimensions are ...

__

Alternate solution

Sometimes finding the solution to a cubic isn't easy. As a starting point, we can recognize that 3x-2 is about the same as 3x, so the value of x will be approximately the solution to ...

  975 = x(3x)(3x) = 9x³

  x = ∛(975/9) ≈ 4.8

The nearest integer to this value is x=5, so that can be a good value to check: 5(3·5)(3·5 -2) = 5·15·13 =975. (x = 5 works!)

Iterated solution

We can rewrite the equation as ...

  975 = 3x²(3x -2)

  325 = x²(3x -2)

  325/(3x -2) = x²

  x = √(325/(3x -2))

A value of x will be a solution to this equation if it makes the right side equal to the left side. This equation works as an "iterator," meaning we can use a value of x on the right side, and the value of that function will give a value of x on the left that is closer to the solution. The table in the second attachment shows this convergence to x=5.

It isn't always easy to find a suitable iteration function for a cubic or higher degree polynomial equation. The usual tools are Descartes' Rule of Signs, and the Rational Root Theorem. The best iteration functions are found using calculus.

If the number of bacteria doubles every 234 hours, we can use the exponential growth formula to find the population at a future time t:

N(t) = N0 * 2^(t/T)

where N(t) is the population at time t, N0 is the initial population, T is the doubling time (234 hours in this case), and t is the time elapsed.

We are given that the initial population is 15,500 bacteria. We want to find the population 936 hours from now. Therefore, we can substitute the values into the formula:

N(936) = 15,500 * 2^(936/234)

N(936) = 15,500 * 2^4

N(936) = 15,500 * 16

N(936) = 248,000

Therefore, the population of bacteria in the colony will be 248,000 after 936 hours.

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The statement that describe the term in the question is (b) the distribution center

A distribution center is a large facility used by manufacturers to store and send out large quantities of products to be distributed to retail stores or directly to customers.

The products are often received in bulk and then sorted, packaged, and shipped to their final destination. The distribution center may also handle other tasks such as inventory management, quality control, and returns processing.

The purpose of the distribution center is to streamline the distribution process, reduce shipping costs, and ensure that products are delivered to their final destination in a timely and efficient manner.

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Answer:

Sales tax: $90 × .05 = $4.50

Total cost: $90 + $4.50 = $94.50

The values of sides x and y of the triangle are 6.75 and 11.25 units respectively.

The square of the hypotenuse side of the right-angled triangle equals the sum of the squares of the other two sides, according to Pythagoras' Theorem. The three sides of this triangle are referred to as the perpendicular, base, and hypotenuse.

by using the Pythagorean theorem:

Equation1:  y ² =x ² + 9²

Equation2:  (12 + x) ² =1 5 ² + y ²

Putting values of equation1  in 2 we get

(12 + x) ² =1 5 ² +x ² + 9²

144 + x²+ 2×12x = 225 + x²+ 81

x=6.75

Putting value of x in equation1

y ² =6.75 ² + 9²

y=11.25

Hence, the values of x and y are

x = 6.75 unit

y =11.25 unit

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The length of the rectangle is 19 cm.

The formula for the area of a rectangle,

Area = Length x Width

Given that the area is 336 cm squared.

So, we can set up an equation,

⇒ 336 = (w + 5)w

where w represents the width of the rectangle.

Expanding this equation,

⇒ 336 = w² + 5w

Moving all terms to one side:

⇒ w² + 5w - 336 = 0

This is a quadratic equation that we can solve using the quadratic formula,

⇒ w = (-5 ± √(5² - 4(1)(-336))) / (2(1))

⇒ w = (-5 ± 23) / 2

We'll take the positive value,

⇒ w = 14

So, the width of the rectangle is 14 cm.

We also know that the length is 5 cm more than the width,

Therefore,

⇒ l = w + 5

⇒ l = 14 + 5

⇒ l = 19

Therefore, the length of the rectangle is 19 cm.

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Answer:

3x = y

x + 4 = y

Step-by-step explanation:

Letter C

Probability that exactly four workers carpool to work is 0.214990847, or approximately 21.5%.

We must apply the binomial distribution formula to resolve this issue. The number of successes in a certain number of independent trials that all have the same chance of success are described by the binomial distribution, which is a type of probability distribution. In this scenario, the number of successes is the number of workers who carpool, and the probability of success is 0.1.

The binomial distribution's formula is:

[tex]P(X=k) = to (n pick k) * p*k*1-p (n-k)[/tex]

Where n is the total number of trials (in this case, 8), p is the success probability (0.1), and (n choose k) is the binomial coefficient, which is equal to [tex]n! / (k! * (n-k)![/tex] and P(X=k) is the probability of obtaining exactly k successes.

This formula can be used to determine the likelihood that four employees will carpool to work:

[tex]P(X=4) = (8 pick 4) * 0.14 * 0.94 * 0.214 = 0.214990847.[/tex]

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The interquartile range of the number of novels

written by each of Amir's 10 favorite authors would be = 7

The total number of the novels written by the 10 favorite authors of Amir = 1 +3 +3 +4+ 5 +7+ 8+ 10+ 12+ 23 = 76

The interquartile range of the number of novels = Q3-Q1

Where Q3 = median of second half = 10

Q1 = median of the first half = 3

The interquartile range of the number of novels = 10-3 = 7

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Step-by-step explanation:

Which of the following shows an example of two irrational numbers being multiplied to get a rational number?

Responses

option c

Answer:

Step-by-step explanation:

28x14x4x6x2+18816

Answer:

7

Step-by-step explanation:

you use your fingers and count down from 4 to -3 and you get 7.

The mean for the sample is 14.5.

We are asked to select a random sample of size 2 by writing the five numbers in this population on slips of paper, mixing them, and then selecting two. We then have to calculate the mean for the sample. The given numbers are: 12, 17, 8, 13, and 20. Therefore, there are five numbers in the population.

Now, we have to choose any two numbers randomly from the population. Let us suppose that we select 12 and 17 randomly from the population. Therefore, the sample will be {12, 17}. Now, we have to calculate the mean of the sample.

The formula to calculate the mean is: mean = sum of all numbers in the sample / total number of items in the sample. The sum of 12 and 17 is 12 + 17 = 29. Therefore, the sum of all numbers in the sample is 29. Also, the total number of items in the sample is 2.

Therefore, we can calculate the mean as: mean = 29 / 2mean = 14. 5. Therefore, the mean for the sample is 14.5.

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The algebraic expression to represent the cost of buying r records and c CDs is given as, Cost = 3r + 1.5c

The music store is selling the records for a price of $3.00 and the CDs for $1.50 each. Let us say someone buys r number of record and c number of CDs.

So, the final algebraic expression that we will get from the above mentioned information is Cost = 3r + 1.5c.

Here, 3r represents the cost of buying "r" number of records at $3.00 each, and 1.5c represents the cost of buying "c" number of  CDs at $1.50 each. By adding these two costs together, we can find the total cost of buying r number of records and c number of CDs.

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A Home Equity Conversion Mortgage (HECM) is a type of mortgage specifically designed for homeowners over the age of 62. It allows the homeowner to access their home’s equity without having to sell it. The HECM loan is secured by the equity in the home and is repaid when the homeowner passes away or sells the home. This type of mortgage is popular with the elderly due to the lack of monthly payments and the flexibility to use the loan proceeds in any way they want. The funds can be used for medical expenses, home repairs, travel, or to supplement retirement income. A HECM is a great way for an elderly homeowner to access the equity in their home without having to make a large upfront payment or sell the home.

A Home Equity Conversion Mortgage (HECM) is a type of mortgage specifically designed for homeowners over the age of 62. It allows the homeowner to access their home’s equity without having to sell it. The HECM loan is secured by the equity in the home and is repaid when the homeowner passes away or sells the home. This type of mortgage is popular with the elderly due to the lack of monthly payments and the flexibility to use the loan proceeds in any way they want. The funds can be used for medical expenses, home repairs, travel, or to supplement retirement income. A HECM is a great way for an elderly homeowner to access the equity in their home without having to make a large upfront payment or sell the home.

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Answer:

Step-by-step explanation:

x = 8

Xavier rode 7.5 miles and Aiguo rode twice as much, or 15 miles.

Let x be the number of miles Xavier rode. Since Aiguo rode twice as many miles as Xavier, let 2x be the number of miles Aiguo rode.

Together, they rode a total of 22.5 miles, so we have the equation:

x + 2x = 22.5

Simplifying, we will get:

3x = 22.5

x = 22.5/3

x = 7.5

We can check our answer by verifying that the sum of their distances is indeed 22.5 miles:

= 7.5 + 15

= 22.5

Therefore, the solution is x = 7.5 and y = 15.

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Answer:

x = -4

y = 1

Step-by-step explanation:

I added a photo of my solution

The mass of dog having weight as 19 kg has its mass in grams as 1.9 x 10⁴ grams, option C.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. The change caused by an applied force is smaller the more mass a body has.

Measuring units to determine the size, weight, or quantity of any object. Seven fundamental measurement units are utilized in daily life and across the globe.

A dog has a mass of 19 kg

The mass of the dog in grams is:

1 kilogram = 1000 grams

19.5 kg × (10³ g/1 kg) = 1.95 × 10⁴ g.

Thus, the mass of the dog in grams is 1.95 × 10⁴ g.

1000 grammes make to 1 kilogram (kg) (g).

1 kg = 1000 g

The mass m in kilogram (kg) multiplied by 1000 gives the mass m in grams (g)

m(g) = m(kg) × 1000.

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The probability that at least one of three randomly selected people has been vaccinated in a large population where 64% of people have been vaccinated is 0.784.

The probability that at least one of three randomly selected people has been vaccinated in a large population where 64% of people have been vaccinated can be calculated using the binomial probability formula.

The binomial probability formula is used to calculate the probability of a given number of successes from a given number of trials when the probability of success is constant. In this case, the number of trials is 3 (i.e. the three randomly selected people) and the probability of success is 64% (i.e. the probability that each of the randomly selected people has been vaccinated).

To calculate the probability that at least one of the three randomly selected people has been vaccinated, we first calculate the probability of none of them having been vaccinated:
P(none) = (1 - 0.64)^3 = 0.216

Then, the probability of at least one of them having been vaccinated is 1 - P(none) = 1 - 0.216 = 0.784.

In conclusion, the probability that at least one of three randomly selected people has been vaccinated in a large population where 64% of people have been vaccinated is 0.784.

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In total, there are 126 cans in the showcase.

We will use the method for the sum of an arithmetic sequence to solve this problem. The formulation is:

S = (n/2)(a + l)

Wherein S is the sum of the sequence, n is the range of terms, a is the first term, and l is the last term.

In this example, the primary time period is 20, and the closing term is 4. The common difference among the terms is -2, given that we are subtracting 2 cans from each row. we will discover the number of terms using the formulation:

l = a + (n-1)d

Wherein d is the common distinction. solving for n, we get:

n = (l - a)/d + 1

n = (4 - 20)/(-2) + 1

n = 9

Now we can plug within the values for a, l, and n into the system for the sum:

S = (n/2)(a + l)

S = (9/2)(20 + 4)

S = 126

Thus, there are 126 cans in the display in total.

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