Arianys has $0.45 worth of pennies and nickels. She has a total of 21 pennies and
nickels altogether. Graphically solve a system of equations in order to determine the
number of pennies, x, and the number of nickels, y, that Arianys has.

The differential equation dy/dt = y(3-y) smug all of the given conditions.

One possible autonomous differential equation with equilibrium solutions at y=0 and y=3, and with y' > 0 for 0 < y < 3 and y' < 0 for -∞ < y < 0 and 3 < y < ∞, is:

dy/dt = y(3-y)

We can see that y=0 and y=3 are equilibrium solutions by setting dy/dt = 0 and solving for y:

dy/dt = y(3-y) = 0

y = 0 or y = 3

To check the sign of y', we can use the derivative of y(3-y) with respect to y:  d/dy (y(3-y)) = 3 - 2y

For y < 0, we have y(3-y) < 0, so d/dy (y(3-y)) < 0, which says that y' < 0.

For 0 < y < 3, we have y(3-y) > 0, so d/dy (y(3-y)) > 0, which implies that y' > 0.

For y > 3, we have y(3-y) < 0, so d/dy (y(3-y)) < 0, which implies that y' < 0.

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The relationship between y and t can be modeled by an exponential function of the form:

y = a x e^(-rt)

An exponential function is a mathematical function which we write as a

f(x) = aˣ, where a is constant and x is variable term. The most commonly used exponential function is eˣ , where e is constant having value 2.7182

The relationship between y and t can be modeled by an exponential function of the form:

y = a x e^(-rt)

where a is the initial area of the forest (1500 km²), r is the rate of decrease (6.25%), and t is the number of years since 2000.

To find the value of r, we can convert 6.25% to a decimal:

r = 0.0625

Now we can plug in the values for a and r into our exponential function:

y = 1500 x e^(-0.0625t)

This exponential function shows the relationship between the area of the forest and the number of years since 2000.

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The simple interest rate for the item is 13 1/3%.

Simple interest is the charge on borrowing calculated as a linear function of the amount borrowed, time and the interest rate.

Interest rate = interest / (time x amount borrowed)

Interest rate = N$16 / (N$480 x 0.25)

= 0.13333 = 13 1/3 %

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The required inequality of the solutions of the given equation is (-∞, -6).

The idea of inequality, which is the state of not being equal, especially in terms of status, rights, and opportunities, is at the core of social justice theories. However, because it frequently has diverse meanings to different people, it is prone to misunderstanding in public discourse.

We have;

2w-1 < -13

2w < -13 + 1

2w < - 12

w < -6

Thus, required inequality of the solutions of the given equation is (-∞, -6)

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The equation C(t) = 2 tells us that at a moment of t, the numeric value of the variable C is of 2 units.

The general format of an ordered pair is given as follows:

(x,y).

The meaning of an ordered pair (x,y) is that y = f(x), meaning that the numeric value of the function at the value of x is of y.

The ordered pair for this problem is given as follows:

(t, C(t)) = (t,2).

Meaning that at a moment of t, the numeric value of the variable C is of 2 units.

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The solution is given below.

A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.

here, we have,

A scatter plot is a graph in which the values of two variables are plotted along two axes. Every data of the table is the coordinate of a point in the plot. To make a scatter plot, first assign a variable to x-axis and the other variable to  y-axis, in this question speed was assigned to x-axis and distance was assigned to y-axis. And then, locate the points as coordinates, for example, the first point is (2, 5).

See picture attached.

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The missing component in the nuclear equation.137Cs55 → X + -e will be 137Ba56. option B is correct.

The particles in the nucleus are changed, and one element is transformed into another element when particles in the nucleus are gained or lost.

Nuclear reactions are processes in which one or more nuclides are produced from the collisions between two atomic nuclei or one atomic nucleus and a subatomic particle.

This was the first observation of an induced nuclear reaction, that is, a reaction in which particles from one decay are used to transform another atomic nucleus.

The most notable man-controlled nuclear reaction is the fission reaction which occurs in nuclear reactors. A target nucleus is within the range of nuclear forces for the time allowing for numerous interactions between nucleons.

therefore, option B is correct.

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The recursive formula for p(n) is; p(n) = p(n-2) + p(n-3) for n >= 3. Case 1: The last square is painted white. If the last square is painted white, then the second to last square must be painted gold.

There are p(n-2) ways to paint the remaining n-2 squares of the checkerboard subject to the restriction.

Case 2: The last square is painted gold. If the last square is painted gold, then the second to last square can be painted either white or gold. If the second to last square is painted white, then there are p(n-3) ways to paint the remaining n-3 squares of the checkerboard subject to the restriction.

If the second to last square is painted gold, then there are p(n-2) ways to paint the remaining n-2 squares of the checkerboard subject to the restriction.

Therefore, the recursive formula for p(n) is: p(n) = p(n-2) + p(n-3) for n >= 3

with initial conditions p(1) = 2 and p(2) = 3.

The base case for the recursion is p(1) = 2 and p(2) = 3, which are the number of ways to paint a 1 x 1 checkerboard and a 1 x 2 checkerboard subject to the restriction, respectively.

The recursive formula counts the number of ways to paint a 1 x n checkerboard subject to the restriction by considering the last column of the checkerboard.

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The remainder when Fn+1 is divided by Fn is Fn-1, and the remainder when Fn is divided by Fn-1 is Fn-2.

Let's denote the greatest common divisor of Fn+1 and Fn as d. We can use the Euclidean Algorithm to find d by repeatedly taking remainders.

First, we have:

Fn+1 = 1*Fn + Fn-1

So, the remainder when Fn+1 is divided by Fn is Fn-1.

Next, we have:

Fn = 1*Fn-1 + Fn-2

So, the remainder when Fn is divided by Fn-1 is Fn-2.

We can continue this process by repeatedly dividing the larger number by the smaller number and taking remainders until we reach a remainder of 0. The last nonzero remainder we obtain is the greatest common divisor of Fn+1 and Fn.

For example, to find the greatest common divisor of F6 = 8 and F7 = 13, we have:

F7 = 1F6 + F5, so the remainder is F5 = 5

F6 = 1F5 + F4, so the remainder is F4 = 3

F5 = 1F4 + F3, so the remainder is F3 = 2

F4 = 1F3 + F2, so the remainder is F2 = 1

F3 = 2*F2 + 0, so we stop here

Therefore, the greatest common divisor of F7 and F6 is d = 1, and the remainders in the Euclidean Algorithm are 5, 3, 2, and 1.

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Answer: 2.25 slices which is 9/4 slices i think im right

Step-by-step explanation:

add 1 1/4+2 3/4+3/4 which makes 4.75 slices or 19/4 slices do 7-4.75=2.25/9/4 slices

To determine the maximum height of a shampoo bottle that can stand upright on the middle shelf, we need to consider the height of the shelf above and below it.

Since there are three shelves, the middle shelf is located at the height of 9 inches (half of the total height).

To find the maximum height of a shampoo bottle that can stand upright on the middle shelf, we need to subtract the height of the middle shelf from the total height of the system, and then divide the result by two, since there are two spaces above and below the middle shelf.

Therefore, the maximum height of a shampoo bottle that can stand upright on the middle shelf is: (18 - 9) / 2 = 4.5 inches

So, the maximum height of a shampoo bottle that can stand upright on the middle shelf is 4.5 inches.

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Q is a non-negative linear combination of permutation matrices.

A non-negative linear combination of permutation matrices is a matrix P that can be expressed as a linear combination of permutation matrices P1, P2, ..., Pn such that each coefficient in the linear combination is non-negative. This can be expressed as:

[tex]P = c1P1 + c2P2 + ... + cnPn[/tex]

where c1, c2, ..., cn are all non-negative real numbers. For example, consider the following matrix Q:

[tex]Q = \begin{bmatrix} 1 & 0 & 0 \\ 0 & 0 & 1 \\ 0 & 1 & 0 \end{bmatrix}[/tex]

We can express Q as a non-negative linear combination of permutation matrices P1, P2, P3 as follows:

[tex]Q = \frac{1}{3}\begin{bmatrix} 0 & 1 & 0 \\ 0 & 0 & 1 \\ 1 & 0 & 0 \end{bmatrix} + \frac{1}{3}\begin{bmatrix} 0 & 0 & 1 \\ 1 & 0 & 0 \\ 0 & 1 & 0 \end{bmatrix} + \frac{1}{3}\begin{bmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{bmatrix}[/tex]

Therefore, Q is a non-negative linear combination of permutation matrices.

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All absolute values are greater than or equal to zero so there is no such absolute value of - 4.

We know the absolute value function of the modulus function always outputs a positive value irrespective of the sign of the input.

In piecewise terms  | x | = x for x ≥ 0 and | x | = - x for x < 0.

We know, |a| = a, |- a| = a, and |0| is 0 therefore, The least possible value of a modulus is zero.

Therefore, There is no such numbers whose modulus value is - 4.

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Answer:

3x^2 - x - 10

Step-by-step explanation:

Foil (First, outside, inside, last)

3x^2 + 5x + -6x - 10

combine like terms

3x^2 - x - 10

Answer:

  6

Step-by-step explanation:

You want the population of Leavetown in 100 years if it is 123,000 now and decreasing at the rate of 9.4% per year.

The exponential equation that models the population is ...

  p = 1230000·(1 -0.094)^t

where t is the number of years later.

For t=100, the attached calculation shows the population in 100 years is about 6 persons.

Let's denote the midpoint of each value interval by x and the frequency by f. Then the estimated mean is given by:

(mean) = (Σxf) / (Σf)

where the summation is taken over all value intervals.

Using the provided grouped frequency table, we can calculate the estimated mean as follows:

Midpoint (x) Frequency (f)     xf

4.5                    12                     54

8.5                      18                     153

12.5                     24            300

16.5                      14             231

Total             68             738

The sum of the xf column is 738, and the sum of the f column is 68. Therefore, the estimated mean is:

(mean) = (Σxf) / (Σf) = 738 / 68 ≈ 10.85

Answer to Question 22:

Since A and B are independent events, we have:

P(B|A) = P(B)

Also, from the definition of conditional probability, we have:

P(B|A) = P(BA) / P(A)

Solving for P(BA), we get:

P(BA) = P(B) * P(A) = 0.13 * 0.72 = 0.0936

Therefore, P(BA) = 0.0936.

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Answer:

False

Step-by-step explanation:

This is because the opposite angles would be congruent, or equal.

I hope this helps! :)

a. Eliminating the parameter yields the equation [tex]x2+y2=100[/tex], which is a circle centered at the origin with a radius of 10.

b. The curve is a circle with a positive orientation, going counterclockwise from the origin.

a. To eliminate the parameter, we first square both sides of the equations to obtain: [tex]x2=(−10cos2t)2 and y2=(−10sin2t)2.[/tex]Then, since cos2t and sin2t are both between -1 and 1, the terms on the right hand side of each equation can be simplified to 100. Thus, the equation [tex]x2+y2=100[/tex]is obtained.

b. This equation describes a circle centered at the origin with a radius of 10. The positive orientation of the curve is counterclockwise from the origin, i.e. it starts at the origin and moves up, then to the right, then down, and then to the left.

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The probability of typing any particular sequence of n letters is (1/26)^n. The probability of word of length m (where m ≤ n) is (1/26)^m. The probability of  at least one occurrence is 1 - (25/26)^(n-m+1). The number of times the monkey types a specific word of length m is (n-m+1)*(1/26)^m.

Assuming that the monkey's key presses are truly random and independent of each other, the probability of the monkey typing any particular sequence of n letters is (1/26)^n. This is because there are 26 choices for each letter, and the probability of the monkey choosing any particular letter is 1/26.

The probability of the monkey typing a specific word of length m (where m ≤ n) is (1/26)^m. This is because the monkey must type the specific sequence of m letters in order, and each letter has a probability of 1/26 of being typed.

The probability of the monkey typing at least one occurrence of a specific word of length m is 1 - (25/26)^(n-m+1). This is because the monkey has n-m+1 opportunities to type the word, and the probability of missing the word in any one opportunity is 25/26 (since there are 25 other letters that the monkey could type instead).

The expected number of times the monkey types a specific word of length m is (n-m+1)*(1/26)^m. This is the product of the probability of the monkey typing the word in any given opportunity (which is (1/26)^m), and the number of opportunities the monkey has to type the word (which is n-m+1).

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As a result, the answer is (e) 2.4 square inches, which is the difference between Richard's measured and real circle area.

In mathematics, area is a measure of the amount of space occupied by a two-dimensional object, such as a rectangle, triangle, circle, or any other shape. It's a scalar quantity that describes the size of a region in two-dimensional space. The units of area are typically square units, such as square inches, square centimeters, square meters, etc. In general, the area of a shape is a measure of how much space it occupies, and it is an important concept in geometry, engineering, and many other fields.

Here,

The formula for the area of a circle is given by:

A = πr²

Where r is the radius of the circle.

Using the incorrect radius of 3.6 inches, the calculated area would be:

A = π * (3.6 inches)² = 40.44 square inches

Using the correct radius of 3.5 inches, the actual area would be:

A = π * (3.5 inches)² = 38.5 square inches

So, the difference between Richard's measured area of the circle and the actual area of the circle would be:

40.44 square inches - 38.5 square inches = 1.94 square inches

Therefore, the answer is (e) 2.4 square inches that is the difference between Richard’s measured area of the circle and the actual area of the circle.

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Therefore, the formula for h, given the assumption that the formula is for the surface area of a cylinder, is: h = 3πr/2 + 3πr²/4.

An equation is a mathematical statement that two expressions are equal to each other. It contains an equals sign (=) between two expressions, with one on each side. An equation can be used to describe a relationship between variables, to solve problems, or to represent a mathematical model. Equations can also be more complex and involve multiple variables and operations, such as the quadratic equation: ax² + bx + c = 0, where a, b, and c are constants and x is the variable. Solving equations is an important part of mathematics and many other fields of study, as it allows us to find solutions to problems and to model and understand real-world phenomena.

Here,

The given formula is:

S = 6π² + 5πr²

To solve for h, we need an equation that relates h to S and r. However, there is no h in the given formula. So either the formula is incomplete or we have to assume some relationship between h, S, and r.

If we assume that the formula is for the surface area of a cylinder, then we can relate h to S and r using the formula for the lateral surface area of a cylinder:

L = 2πrh

where L is the lateral surface area, h is the height, and r is the radius.

The total surface area S of a cylinder can be found by adding the area of the two circular bases (2πr²) to the lateral surface area:

S = 2πr² + L

S = 2πr² + 2πrh (substituting L with 2πrh)

Now we can rearrange this formula to solve for h:

S - 2πr² = 2πrh

h = (S - 2πr²) / (2πr)

Substituting the given value of S:

h = (6π² + 5πr² - 2πr²) / (2πr)

h = (6π² + 3πr²) / (2πr)

h = 3πr/2 + 3πr²/4

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To find the Notes Payable balance, we need to use the accounting equation:

Assets = Liabilities + Equity

We are given the following information:

AP = $2,500

Building = $31,250

Land = $30,000

Notes Payable = ?

Retained Earnings = $125,000

AR = $18,750

Cash = $67,500

Equipment = $40,000

Capital Stock = $12,500

We can add up the assets to get:

Assets = AP + Building + Land + AR + Cash + Equipment

= $2,500 + $31,250 + $30,000 + $18,750 + $67,500 + $40,000

= $190,000

We can rearrange the accounting equation to solve for liabilities:

Liabilities = Assets - Equity

Plugging in the values we have:

Liabilities = $190,000 - ($125,000 + $12,500)

= $190,000 - $137,500

= $52,500

Therefore, the Notes Payable balance is:

Notes Payable = Liabilities - AP

= $52,500 - $2,500

= $50,000

The payment rate that is required to pay off the loan in 3 years is $3139.88 per year. The borrower will pay approximately $1695.64 in interest over the 3-year period.

The differential equation that models this situation is:

dy/dt = 0.10y - k

where y(t) is the amount owed at time t, 0.10 is the annual interest rate, and k is the annual payment rate. The initial condition is y(0) = $8000.

The first term on the right-hand side represents the interest that accumulates on the loan, and the second term represents the payments made by the borrower.

To determine the payment rate k that is required to pay off the loan in 3 years, we need to solve the differential equation with the initial condition y(0) = $8000 and the terminal condition y(3) = 0.

The general solution to the differential equation is:

y(t) = (8000/k) e^(0.10t) - (8000/k)

Setting t = 3 and y(3) = 0, we get:

0 = (8000/k) e^(0.30) - (8000/k)

Solving for k, we get:

k = 3139.88

Therefore, the payment rate that is required to pay off the loan in 3 years is $3139.88 per year.

To determine how much interest is paid during the 3-year period, we can integrate the interest rate over the time interval [0, 3]:

∫[0,3] 0.10y(t) dt = ∫[0,3] 0.10[(8000/k) e^(0.10t) - (8000/k)] dt

= (8000/k) [e^(0.30) - 1] - 2400

Substituting k = 3139.88, we get:

∫[0,3] 0.10y(t) dt ≈ $1695.64

Therefore, the borrower will pay approximately $1695.64 in interest over the 3-year period.

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____The given question is incomplete, the complete question is given below:

A certain college graduate borrows $8000 to buy a car. The lender charges interest at an annual rate of 10%. Assume that interest is compounded continuously and that the borrower makes payments continuously at a constant annual rate k. (a) Write a differential equation that models this situation, including the initial condi- tion. (b) Determine the payment rate k that is required to pay off the loan in 3 years. (c) Determine how much interest is paid during the 3-year period.

The probability that both prizes were won by two people of the same sex is 0.48

Let's call the number of men in the small party "m" and the number of women in the small party "w". The total number of people in the party is "m + w = 10 + 12 = 22".

The number of ways to choose two people of the same sex can be calculated as follows:

The number of ways to choose two men is "C(m,2) = C(10,2) = 45".

The number of ways to choose two women is "C(w,2) = C(12,2) = 66".

The total number of ways to choose two people without replacement is "C(22,2) = 231".

The probability that both prizes were won by two people of the same sex is then given by the sum of the probabilities for two men or two women:

P(same sex) = (C(10,2) / C(22,2)) + (C(12,2) / C(22,2)) = (45/231) + (66/231) = 111/231 = approx. 0.48

So, the probability that both prizes were won by two people of the same sex is approximately 0.48

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Answer:

which book are u talking about.. post the question please..

The Probability density function for the power P is f(P) = 1/2 * (1/P) for 162 < P < 242.

The power P is equal to 2I^2, so we can find the probability density function of P by finding the distribution of I first. A uniformly distributed random variable X over an interval (a, b) has a probability density function given by:

f(x) = 1/(b - a) for a < x < b

Since I is uniformly distributed over (9, 11), its probability density function is:

f(I) = 1/(11 - 9) = 1/2

Now, to find the distribution of P, we can use the transformation function P = 2I^2:

f(P) = f(I) * |dI/dP|

Using the chain rule, we have:

dI/dP = dI/d(2I^2) * d(2I^2)/dP = 1/2 * (2I) = I/P

So:

f(P) = f(I) * (1/P) = 1/2 * (1/P)

Now, we need to find the bounds for P. The power P can be calculated for any value of I between 9 and 11, so the bounds for P are:

P_min = 2 * 9^2 = 162

P_max = 2 * 11^2 = 242

Therefore, the probability density function for the power P is:

f(P) = 1/2 * (1/P) for 162 < P < 242

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____The given question is incomplete, complete question is given below:

A fluctuating electric current I may be considered a uniformly distributed random variable over the interval (9, 11). If this current flows through a 2-ohm resistor, find the probability density function of the power P = 2I^2.

Based on the given information and measurements, the following statements are true:

The perimeter of the full-size game board is six times the perimeter of the travel-edition game board: This statement is false. The perimeter of the full-size game board can be calculated as the sum of the lengths of its three sides: AB + BC + AC = 32 + 52 + 52 = 136 cm. The perimeter of the travel-edition game board can be calculated as the sum of the lengths of its three sides: AX + XY + YZ = 13 + 21 + 18 = 52 cm. Therefore, the perimeter of the full-size game board is 2.62 times the perimeter of the travel-edition game board, not 6 times.

The travel-edition side corresponding to the 48-cm side on the full-size board will measure 12 centimeters: This statement is false. The travel-edition side corresponding to the 48-cm side on the full-size board is side XY. The length of XY can be calculated using proportions: XY/48 = YZ/52, which gives XY = 48*18/52 = 16.62 cm (rounded to two decimal places).

The travel-edition side corresponding to the 48-cm side on the travel-edition board will measure 13 centimeters: This statement is true. The travel-edition side corresponding to the 48-cm side on the travel-edition board is side AX, which has a length of 13 cm.

The three angles represented on the travel-edition board are congruent to their corresponding angles on the full-size board: This statement is true. The three angles of a triangle are determined by the lengths of its sides, so if two triangles have the same side lengths, their angles must be congruent as well.

Therefore, the three angles represented on the travel-edition board (at vertices A, X, and Y) are congruent to their corresponding angles on the full-size board (at vertices A, B, and C).

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The inequality that Contessa is solving is obtained as 5 ≥ q ≥ 1/3.

What is an inequality?

In Algebra, an inequality is a mathematical statement that uses the inequality symbol to illustrate the relationship between two expressions. An inequality symbol has non-equal expressions on both sides. It indicates that the phrase on the left should be bigger or smaller than the expression on the right, or vice versa.

The given compound inequality is = -7 ≤ 8 - 3q ≤7

To solve this compound inequality, start by subtracting 8 from each part of the inequality -

-15 ≤ -3q ≤ -1

Next, divide each part by -3, remembering to flip the direction of the inequalities since it is getting divided by a negative number -

5 ≥ q ≥ 1/3

So the solution to the inequality -7 ≤ 8-3q ≤ 7 is the set of all q values that lie between 1/3 and 5, including the endpoints 1/3 and 5.

Note that this solution set is different from the solution set of the absolute value inequality |8-3q| < 7, which does not include the endpoints.

Therefore, the inequality is 5 ≥ q ≥ 1/3.

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The following system of liner equation when converted into equivalent matrix gives us x =2, y = 3, z = -2.

Given that the augmented matrix is [AB] = [tex]\left[\begin{array}{cccc}1&2&2&4\\0&1&-3&9\\0&0&1&-2\end{array}\right][/tex]

Since p(A) = p(AB) = 3 = n = The number of variables

The system has unique solution

x + 2y + 2z = 4

y - 3z = 9

z = -2

y = 9 + 3z = 9 + 3(-2) = 3

x = 4-2y -2z

= 4 -2(3) -2(-2)

= 4 - 6 + 4

= 2

Therefore, the solution is x =2, y = 3, z = -2.

The abecedarian idea is to add multiples of one equation to the others in order to exclude a variable and to continue this process until only one variable is left. Once this final variable is determined, its value is substituted back into the other equations in order to estimate the remaining unknowns. This system, characterized by step ‐ by ‐ step elimination of the variables, is called Gaussian elimination.

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Complete question;

The augmented matrix of a system of equations has been transformed to an equivalent matrix in​ row-echelon form. Using​ x, y, and z as​ variables, write the system of equations corresponding to the following matrix. If the system is​ consistent, solve it.

left bracket Start 3 By 3 Matrix 1st Row 1st Column 1 2nd Column 2 3rd Column 2 2nd Row 1st Column 0 2nd Column 1 3rd Column negative 3 3rd Row 1st Column 0 2nd Column 0 3rd Column 1 EndMatrix Start 3 By 1 Table 1st Row 1st Column 4 2nd Row 1st Column 9 3rd Row 1st Column negative 2 EndTable right bracket