Solving Systems of Linear Equations
Performance Assessment

You are the student council member responsible for planning a school dinner dance. You will
need to choose a caterer, hire a band, analyze costs, and choose flowers for decoration. You
need to keep the ticket price as low as possible and still cover the costs.

Part 1 Choosing a Band

Band A charges a flat fee of $500 to play for the evening.
Band B charges $350 plus $1.50 per student.

Part A: Write a system of equations to represent the cost of the two bands.
Part B: Graph the system of equations and find the number of students for which the cost of
the bands would be equal.

Part 2: Choosing a Caterer

A caterer charges a fixed amount for preparing a dinner plus a rate per student served. The
total cost is modeled by the equation:
Total cost = fixed amount + rate * number of students
You know that the total cost for 50 students will be $450 and the total cost for 150 students
will be $1050. Find the caterer's fixed cost and the rate per student served. Explain your
answer.

Part 3: Analyzing cost

Use the information from Items 1 and 2. Assume that 100 students come to the dinner dance.
Decide which band you should choose and what the total cost per ticket should be to cover
the expenses of the band and caterer. Then repeat your calculations for 200 students.
Explain your reasoning.

Part 4: Choosing Flowers

You can spend no more than $500 on flowers for the event. A bouquet of daisies cost $25
each and a bouquet of roses cost $35 each.

Part A: Write and graph an inequality that represents the number of each type of flower that you can buy.

Part B: Suppose you buy 15 bouquets of daisies. What is the maximum number of bouquets
of roses you can afford? Explain.

According to the question we can conclude that the percent decrease in the number of available parking spots is 4.5%.

In mathematics, a percentage is a number or ratio that's also expressed as just a fraction from 100. Occasionally, the acronyms "pct.," "pct," as well as "pc" are also used. Yet it is commonly indicated by the percent sign, "%." The % amount has no dimensions. Percentages are essentially fractions when the denominator is 100. Use the percent sign (%) to indicate that what a number is just a percentage by placing it next to it. For instance, you score a 75% if you properly answered 75 out of questions in total on something like a test (75/100). Divide the money even by total as well as multiply the outcome by 100 to calculate percentages. The formula for calculating the percentage is (value/total) x 100%.

Given,

To find the percent decrease in the number of available parking spots, we need to calculate the difference between the initial number of parking spots and the new number of parking spots, and express it as a percentage of the initial number of parking spots.

The initial number of parking spots is 1400, and the new number of parking spots after the library is built is 1400 - 63 = 1337.

The difference between the initial number of parking spots and the new number of parking spots is 1400 - 1337 = 63.

To express this difference as a percentage of the initial number of parking spots, we divide the difference by the initial number and multiply by 100:

(63 / 1400) x 100 = 4.5%

Therefore, the percent decrease in the number of available parking spots is 4.5%.

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(a) The probability of the questions being history, literature, and science in that order is 5/18 x 6/17 x 7/16, which is 0.04.

(b) The probability of all three questions being literature questions is 6/18 x 5/17 x 4/16, which is 0.024.

(c) The probability of the first question being science, the second history, and the third science is 7/18 x 5/17 x 7/16, which is 0.05.

In playing cards, it can be used to predict the likelihood of a certain outcome or to make decisions based on the probability of certain events occurring.

(a) The probability of the questions being history, literature, and science in that order is 5/18 x 6/17 x 7/16, which is 0.04.

(b) The probability of all three questions being literature questions is 6/18 x 5/17 x 4/16, which is 0.024.

(c) The probability of the first question being science, the second history, and the third science is 7/18 x 5/17 x 7/16, which is 0.05.

The probabilities of each of these scenarios can be calculated by multiplying the probabilities of drawing each of the three cards in the desired order.

For the first scenario, the probability of drawing a history question is 5/18, the probability of drawing a literature question is 6/17 (since there is one fewer card), and the probability of drawing a science question is 7/16 (since there are two fewer cards).

Multiplying these together gives us the probability of the questions being history, literature, and science in that order, which is 0.0771.

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After 3 years, there will be $2,810.95 in the Richardsons' account and the interest earned on the Richardsons' investment after 3 years will be around $310.95.

(a) The interest rate per month is r = 1.36% ÷ 12 = 0.01133333. The number of compounding periods in 3 years is n = 3 × 12 = 36. Therefore, the amount A after 3 years is:

A = 2500 × (1 + r)ⁿ

A = 2500 × (1 + 0.01133333)³⁶

A = $2,810.95

Therefore, after 3 years, there is $2,810.95 in the Richardsons' account.

(b) The interest earned is the difference between the final amount and the initial investment:

Interest = A - P

I = $2,810.95 - $2,500

I = $310.95

Therefore, the interest earned on the Richardsons' investment after 3 years is $310.95.

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Answer: y/5

Step-by-step explanation:

5 is the hypotenuse of the triangle and it always goes at the bottom of the fraction. Cosine is the closest two sides to the angle. Giving the answer y/5

Step-by-step explanation:

For RIGHT triangles ( such as this one) , remember S-O-H-C-A-H-T-O-A .

SinΦ =  Opposite LEG / Hypotenuse

Sin (53) = 4/x

After answering the presented question, we can conclude that angles  m/CQW = 180° - 125° - 50° => m/CQW = 5° Therefore, m/CQW = 5°.

An angle is a shape in Euclidean geometry that is made up of two rays that meet at a point in the middle known as the angle's vertex. Two rays may combine to form an angle in the plane where they are located. When two planes collide, an angle is generated. They are referred to as dihedral angles. An angle in plane geometry is a possible configuration of two radiations or lines that express a termination. The word "angle" comes from the Latin word "angulus," which meaning "horn." The vertex is the place where the two rays, also known as the angle's sides, meet.

The measure of an inscribed angle is half the measure of its intercepted arc, according to the inscribed angle theorem.

Because C and Q are on the same diameter MQ, m/CQM = 90°. As a result, the intercepted arc CZQ measures 180° - 90° = 90°.

Similarly, because W and Q are on the CW diameter, we have m/CWQ = 90°. As a result, the intercepted arc WVQ measures 180° - 90° = 90°.

m/CQW = 180° - m/CVQ - m/ZVW

m/CQW = 180° - 125° - 50°

m/CQW = 5°

Therefore, m/CQW = 5°.

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Answer: To find a common denominator for 1/3 and 1/12, we need to divide each whole into the same number of equal parts. The denominator of 1/3 represents three equal parts, so we can divide the whole into three parts. The denominator of 1/12 represents twelve equal parts, so we can divide the whole into twelve parts.

The smallest number of parts that both 3 and 12 divide into evenly is 12. So, we can represent 1/3 as 4/12 by dividing each of the three equal parts into four smaller equal parts. And we can represent 1/12 as 1/12 by dividing each of the twelve equal parts into one smaller equal part.

Therefore, a common denominator for 1/3 and 1/12 is 12, and we can rewrite the fractions as:

1/3 = 4/12

1/12 = 1/12

Step-by-step explanation:

Answer: 14.4

Step-by-step explanation:

Answer:

The formula for area of a circle is A = π r²

Step-by-step explanation:

We have the diameter of the circle (8 kilometers) which gives us enough information to find the area of this cicle. We can find the radius from the dimeter (by using the simple formula r=d/2) the radius is always half of the diameter. So 8 km/2= 4 kilmeters so the radius is 4 kilometers.

now that we have the radius we can solve this problem

π×4²= 50.24

what I did was that I multiplied 3.14×4² than i got 50.24

since you want your answer in square km the answer would be 50.24²Kilometers

i hope this helps :)

happy studying!!!

o show that 4.57 (5 and 7 recurring) is equal to 4 and 19/33, we can use algebraic equations. First, let x = 4.57 (5 and 7 recurring), then we multiply both sides by 100 to get 100x = 457.5757... Next, we subtract x from 100x to get 99x = 453. Thus, x = 453/99. We can simplify this fraction by dividing both the numerator and denominator by 3, giving us 151/33. Finally, we can write 151/33 as a mixed number, which is 4 and 19/33. Therefore, we have shown that 4.57 (5 and 7 recurring) is equal to 4 and 19/33 using algebraic equations.

We know that z varies directly as √√x and inversely as y, which can be written as:

z = k(√√x)/y

where k is the constant of proportionality.

To find the value of k, we can use the values given when x = 25 and y = 7:

179 = k(√√25)/7

179 = k(5/7)

k = (179*7)/5

k = 250.6

Now we can use this value of k to find z when x = 64 and y = 4:

z = 250.6(√√64)/4

z = 250.6(2)/4

z = 125.3

Therefore, z ≈ 125.3 when x = 64 and y = 4.

The expression 1 -25x² +10xy-y² in product form is (1-5x-y)(1+5x-y).

In mathematics, an expression is a combination of numbers, variables, and mathematical operations, such as addition, subtraction, multiplication, division, and exponentiation. Expressions can be simple, such as a single number or variable, or complex, involving multiple operations and variables. Expressions are used in a variety of mathematical contexts, including algebra, calculus, and geometry. They can be evaluated to obtain a numerical value, simplified by combining like terms or using algebraic identities, or used to represent mathematical relationships and patterns.

Here,

The given expression can be written as a product of two binomials as follows:

(1-5x-y)(1+5x-y)

Expanding this product gives:

1(1) + 5x(1) - y(1) - 5x(1) - 25x² + 5xy + y(1) - y(5x) - y²

Simplifying this expression gives:

1 - 25x² + 10xy - y²

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Answer:

y=-5x+6

Step-by-step explanation:

Slope-intercept form is y=mx+b, with m being the slope and b being the y-intercept.

The y-intercept is where the line crosses over the y-axis. In this case, there is a point on 6, which means 6 is our y-intercept.

Next, we need to calculate the slope. We know slope = rise/run.

Start at the point -9,3. We rise 5 and go left 1 to get to the point -4,2.

Since we went left, our slope is 5/-1, which simplifies to -5.

Our final answer, written in slope intercept form, is y=-5x+6

The student needs to score 94 in 5th to get an average of 94 points.

The term "average" generally refers to the arithmetic mean, which is a measure of central tendency calculated by adding up all the values in a dataset and then dividing by the total number of values.

Hence the formula used to calculate the average is

Average = [ Sum of observations]/ No of observations

Here we have

A student scored 98, 94, 96, and 88 points out of 100 on the last 4 tests.  

Here we need to at what score the average will be 94

Let x be the score the student got on 5 th test and the average is 94

Using the formula,

Average of the 5 test scores = [ 98 + 94 + 96 + 88 + x ]/ 5

As we assumed the average is 94

=>  [ 98 + 94 + 96 + 88 + x ]/ 5 = 94

=>  98 + 94 + 96 + 88 + x = 470  

=> 376 + x = 470

=> x = 94

Therefore,

The student needs to score 94 in 5th to get an average of 94 points.

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The vertices of the similar figure that results from the dilation and translation will be A'' = (2a - 1, 2b), B'' = (2c - 1, 2b), C'' = (2c - 1, 2d), and D'' = (2a - 1, 2d).

Assume that the rectangle's four vertices are A, B, C, and D, with the corresponding coordinates being (a, b), (c, b), (c, d), and (a, d).

First, enlarge the rectangle.

We must multiply the coordinates of each vertex by the scale factor of two in order to enlarge the rectangle. We can apply the following formulas because the centre of dilation is at (0, 0):

Old x-coordinate + 2 equals the new x-coordinate

Old y-coordinate + 2 times the new y-coordinate

Therefore, following dilation, the new coordinates for the vertices will be: A' = (2a, 2b)

B' = (2c, 2b)

C' = (2c, 2d)

D' = (2a, 2d)

Translate the Figure in Step 2

The x-coordinate of each vertex must be reduced by one in order to translate the figure one unit to the left. Therefore, following translation, the vertices' new coordinates will be: A' = (2a - 1, 2b)

B'' = (2c - 1, 2b)

C'' = (2c - 1, 2d)

D'' = (2a - 1, 2d)

As a result, A'' = (2a - 1, 2b), B'' = (2c - 1, 2b), C'' = (2c - 1, 2d), and D'' = (2c - 1, 2d) will be the vertices of the similar figure that comes from the dilation and translation. (2a - 1, 2d).

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The following question may be like this:

Suppose he got dilates the rectangle shown below with the center of dilation at 0,0 and a scale factor of 2, and then translates the figure 1 unit to the left. What will be the coordinates of the vertices of the similar figure that results

Paula's account will earn a total of $282,546.60 in interest over the next 20 years, in addition to her initial investment of $250,000.

The monthly yield on Paula's account can be calculated using the following formula:

Monthly Yield = (Account Balance x Annual Percentage Rate) ÷ (12 x 100)

Monthly Yield = (250,000 x 5.63) ÷ (12 x 100) = $1,177.29

So, Paula's account will earn a monthly yield of $1,177.29 for the next 20 years. To calculate the total amount earned over the 20-year period, we can multiply the monthly yield by the number of months in 20 years (i.e., 240):

Total Earnings = Monthly Yield x Number of Months

Total Earnings = $1,177.29 x 240

Total Earnings = $282,546.60

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The surface area of the cylinder has a radius of 8cm and a height of 6cm is 703.36 square feet.

To calculate the surface area of a cylinder, we need to add the area of the top and bottom circles to the area of the curved side.

The formula for the area of a circle is:

A = [tex]\pi r^2[/tex]

where A is the area, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius.

The formula for the curved surface area of a cylinder is:

C = 2πrh

where C is the curved surface area, r is the radius, and h is the height of the cylinder.

Given that the radius is 8cm and the height is 6cm, we can calculate the surface area as follows:

Area of top circle =

Area of bottom circle =[tex]\pi r^2[/tex] = 3.14 x [tex]8^2[/tex] = 200.96 cm square

Curved surface area = 2πrh = 2 x 3.14 x 8 x 6 = 301.44 cm square

Therefore, the total surface area of the cylinder is:

Total surface area = Area of top circle + Area of bottom circle + Curved surface area

Total surface area = 200.96 [tex]cm^2[/tex] + 200.96 [tex]cm^2[/tex] + 301.44 [tex]cm^2[/tex]

Total surface area = 703.36 [tex]cm^2[/tex]

What is the surface area of the cylinder? Use 3.14 for pi and round your answer to the nearest hundredth with radius 8ft and height 6ft.

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Answer:

A = (1/2)(3.6)(5.1 + 8.5 + 5)

= 1.8(18.6)

= 33.48 square inches

Answer:

If the average rates of return are the same for both companies, but one company has a much larger standard deviation of its rates of return. You should invest in a company with a smaller standard deviation.

This is the better choice because a larger standard deviation means that the company's returns are more variable, which implies more risk. While higher risk can result in higher returns, it can also result in significant losses. Investing in a company with a smaller standard deviation of its rates of return will likely result in a more stable return on investment and therefore be a safer investment.

In general, investors should consider both the average and variability returns when making investment decisions. While higher average returns are desirable, they may not be worth the additional risk if the variability of returns is too high.

the equation of the line that passes through the 7 points (1, 3), (2, 5),

(3, 7), (4, 9), (5, 11), (6, 13), and (7, 15) is y = 2x + 1.

The point-slope form of a linear equation is a way to write the equation of a line when you have a known point on the line and the slope of the line. The point-slope form is written as:

[tex]y - y_{1} = m(x - x_{1} )[/tex]

where m is the slope of the line, and (x1, y1) is the known point on the line.

The 7-point slope form is a variation of the point-slope form that requires knowing 7 points on the line, rather than just one. It is written as:

[tex](y - y_{1} ) = ((y_{2} - y_{1} ) / (x_{2} - x_{1} ))(x - x_{1} )[/tex]

where[tex](x_{1} , y_{1} ) and (x_{2} , y_{2} )[/tex] are two points on the line with known coordinates, and m is the slope of the line, which can be calculated using the two points.

To use the 7-point slope form to write the equation of a line, you need to know the coordinates of 7 points that lie on the line. Once you have these coordinates, you can choose any two of them to use as [tex](x1, y1) and (x2, y2)[/tex] in the formula, and then solve for the slope m. Once you have the slope, you can plug in the coordinates of any one of the 7 points into the 7-point slope form to find the equation of the line.

For example, let's say we have the following 7 points on a line: (1, 3), (2, 5), (3, 7), (4, 9), (5, 11), (6, 13), and (7, 15).

We can choose any two of these points to use as[tex](x_{1} , y_{1} ) and (x_{2} , y_{2} )[/tex] in the 7-point slope form. Let's choose (1, 3) and (2, 5).

The slope m can be calculated as:

[tex]m = (y_{2} - y_{1} ) / (x_{2} - x_{1} )[/tex]

m = (5 - 3) / (2 - 1)

m = 2

Now we can plug in the values of[tex](x_{1} , y_{1} )[/tex] , m, and x into the 7-point slope form to get the equation of the line:

[tex](y_{2} - y_{1} ) =m (x_{2} - x_{1} )[/tex]

(y - 3) = 2(x - 1)

y - 3 = 2x - 2

y = 2x + 1

So the equation of the line that passes through the 7 points (1, 3), (2, 5), (3, 7), (4, 9), (5, 11), (6, 13), and (7, 15) is y = 2x + 1.

In summary, the 7-point slope form is a variation of the point-slope form that requires knowing the coordinates of 7 points on a line. Once you have these coordinates, you can use the 7-point slope form to find the equation of the line.

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Answer:

a) The weight of a fish after it's caught

the polynomial with zeros 0, -3, and 2 with multiplicities 2, 1, and 2 respectively is: f(x) = x⁵ - 8x⁴ - 4x³ + 48x² - 96xThe degree of this polynomial is 5, since the highest power of x in the polynomial is 5.

what is polynomial ?

A polynomial is a mathematical expression consisting of variables (also known as indeterminates) and coefficients, combined using arithmetic operations such as addition, subtraction, multiplication, and non-negative integer exponents.

In the given question,

If the zeros of a polynomial are given, we can construct the polynomial by multiplying its factors. Since the given zeros are 0, -3, and 2 with multiplicities 2, 1, and 2 respectively, we can write the factors of the polynomial as follows:

(x - 0)²(x - (-3))(x - 2)²

Simplifying this expression, we get:

x²(x + 3)(x - 2)²

Expanding this expression, we get:

x^²(x² - 4x - 12)(x - 2)²

Multiplying the factors and combining like terms, we get:

x⁵ - 8x⁴ - 4x³ + 48x² - 96x

Therefore, the polynomial with zeros 0, -3, and 2 with multiplicities 2, 1, and 2 respectively is:

f(x) = x⁵ - 8x⁴ - 4x³ + 48x² - 96x

The degree of this polynomial is 5, since the highest power of x in the polynomial is 5.

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Jayden traveled 30 times as many miles to visit his brother than his sister.

What is travel?

To find how many times as much Jayden traveled to visit his brother than his sister, we can divide the distance he traveled to visit his brother by the distance he traveled to visit his sister:

(7.5 x 10³ miles) / (2.5 x 10² miles) = 30

Therefore, Jayden traveled 30 times as many miles to visit his brother than his sister.

What is distance?

Distance is the measure of the space between two points or objects. It is typically measured in units such as meters, kilometers, miles, feet, or inches. In physics, distance is the scalar quantity that represents the magnitude of the displacement between two positions. In mathematics, distance is a metric that satisfies certain properties, such as being non-negative and symmetric, and it is used to define concepts like convergence and continuity. The concept of distance is fundamental to many fields of study, including physics, mathematics, geography, and engineering.

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Required length of HF, angle H, angle F are 12.05 unit, 44.2°, 80.5° respectively.

How to find the length of the third side of a triangle when length of two sides are already given?

To find the length of the third side, HF, we can use the Law of Cosines, which states that:

c² = a² + b² - 2ab cos(C)

where c is the length of the side opposite angle C, and a and b are the lengths of the other two sides.

In this case, we have:

HF² = HG² + GF² - 2HG × GF × cos(HGF)

HF² = 7² + 13² - 2 × 7 × 13 × cos(136°)

HF² = 49 + 169 - 182cos(136°)

HF² ≈ 145.35

Taking the square root of both sides,

HF ≈ 12.05

So the length of the third side, HF, is approximately 12.05 units.

To find the angles, we can use the Law of Sines, which states that,

a/sin(A) = b/sin(B) = c/sin(C)

where a, b, and c are the lengths of the sides opposite angles A, B, and C, respectively.

In this case, we know the lengths of HG, GF, and HF, so we can find the angles H and F,

sin(H) / 7 = sin(136°) / 12.05

sin(H) ≈ 0.689

H ≈ 44.2°

sin(F) / 13 = sin(136°) / 12.05

sin(F) ≈ 0.992

F ≈ 80.5°

Therefore, the length of HF is approximately 12.05 units, the angle H is approximately 44.2°, and the angle F is approximately 80.5°.

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When diagonalizing Matrix A = PDP^(-1) and λ1 = (1 + √5)/2 and λ2 = (1 - √5)/2 are the eigenvalues of A, and [0 1] is an eigenvector associated with both λ1 and λ2.

To diagonalize a matrix, we need to find its eigenvalues and eigenvectors. Let's begin by finding the eigenvalues of A.

The characteristic equation is given by:

det(A - λI) = 0

where I is the identity matrix and λ is the eigenvalue.

For matrix A, we have:

A - λI = [1 - λ 0 ]

[6 -1 - λ]

det(A - λI) = (1 - λ)(-1 - λ) - 6(0) = λ^2 - λ - 1 = 0

Using the quadratic formula, we find that the eigenvalues are:

λ1 = (1 + √5)/2

λ2 = (1 - √5)/2

Now let's find the eigenvectors associated with each eigenvalue. For λ1 = (1 + √5)/2, we have:

(A - λ1I)x = 0

[1 - λ1 0] [x1] = [0]

[6 -1 - λ1] [x2] [0]

which simplifies to:

[-(√5-1)/2 0] [x1] = [0]

[6 -√5-1] [x2] [0]

From the first row, we have x1 = 0. Substituting this into the second row, we get:

(√5+1)x2 = 0

Since x2 cannot be zero (otherwise the eigenvector would be the zero vector), we have:

x2 = 1

Therefore, the eigenvector associated with λ1 is:

v1 = [0 1]

Similarly, for λ2 = (1 - √5)/2, we have:

(A - λ2I)x = 0

[1 - λ2 0] [x1] = [0]

[6 -1 - λ2] [x2] [0]

which simplifies to:

[-(√5+1)/2 0] [x1] = [0]

[6 -√5+1] [x2] [0]

From the first row, we have x1 = 0. Substituting this into the second row, we get:

(√5-1)x2 = 0

Again, since x2 cannot be zero, we have:

x2 = 1

Therefore, the eigenvector associated with λ2 is:

v2 = [0 1]

Now we can use the eigenvectors to diagonalize the matrix. The diagonal matrix D will have the eigenvalues on the diagonal and zeros elsewhere. The matrix P will have the eigenvectors as columns.

D = [λ1 0]

[0 λ2]

P = [v1 v2] = [0 0]

[1 1]

To check that this is the correct diagonalization, we can verify that:

A = PDP^(-1)

where P^(-1) is the inverse of P. Since P is not invertible (the columns are linearly dependent), we can use the pseudoinverse instead:

A = PD†P

where D† is the pseudoinverse of D. We have:

we have diagonalized A as:

A = PDP^(-1)

where:

D = [λ1 0]

[0 λ2]

P = [v1 v2] = [0 0]

[1 1]

and λ1 = (1 + √5)/2 and λ2 = (1 - √5)/2 are the eigenvalues of A, and [0 1] is an eigenvector associated with both λ1 and λ2.

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Answer:

The answer is the first graph.

Step-by-step explanation:

f(0) = l0-2l + 1

f(0) =2 + 1

f(0) = 3

(0,3)

f(1) = l1-2l + 1

f(1) = 1 + 1

f(1) = 2

(1,2)

f(2) = l2 -2 l + 1

f(2) = 0 + 1

f(2) = 1

(2,1)

f(3) = l3-2l + 1

f(3) = 1 = 1

f(3)

2

(3,2)

f(4) = l4-2l + 1

f(4) = 2 + 1

f(4) = 3

(4,3)

If you graph each of the ordered pairs that are in bold, you will see that it matches the first graph.

Helping in the name of Jesus.

Answer:

a

Step-by-step explanation:

The answer is x = 3 y=3. This can be solved by reorganising the equation 2x + 3y = 15, x-y=0.

This property is true for all real numbers, including integers, fractions, decimals, and any other real number. The Multiplication Zero Property states that the product of any number and zero is equal to zero.

Reorganising the equation:

2x + 3y = 15

x-y=0

To find the solution, multiply both parts of the equation by a multiplier, as in 2x+3y=15.

2(x-y)=0 x 2

Utilize the multiplicative distributional rule.

2x+3y=15

2x-2y=0 x 2

Application of the Multiplication Zero Property

2x+3y=15

2x-2y=0

Separate the two formulas: 2x+3y-(2x-2y)=15-0

2x+3y-2x+2y=15

Take the parentheses off

3+2=15

Expressions combined: 5y=5

Multiply both sides of the equation by the value of the variable: y = 15/5

Take out the joining piece. y=3

Substitute 0 for 2x-2x-2x in one of the computations.

2x-6=0 is used to determine the product.

In the calculation, 6 should be shifted to the left: 2x=6

Add the variable's value to both ends of the equation, then subtract it:

x = 6/2

Take out the intermediary: 2 = 3

The  answer is x = 3 y=3.

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Answer:

A closed circle on a number line represents an inclusive boundary, meaning that the endpoint is included in the set of values being represented. For example, if a closed circle is placed at the number 2 on a number line, it means that 2 is included in the set of values being represented. In interval notation, this would be written as [2, ...).

The answer is Option (C) -4.