5 - 3(7 - 2r)
How do I simplify the expression

Answer:

a) Which item’s price was reduced by more, and by how many dollars more was it reduced?

The DVD player's price was reduced more by $3.82 than the stereo tuner's price.

b) Round all dollar values to the nearest cent.

Rounding $3.82 dollars to the nearest cents

$1 = 100 cents

$3.82 =

3.82 × 100 cents

= 382 cents

The DVD player's price was reduced by 382 cents more than the stereo tuner's price

Step-by-step explanation:

Lets day the original price of the DVD player was $100

We are told the price was marked down to 36%

36% of $100 = $36

$100 - $36 = $64

We are told the DVD cost $41.60 after the markdown.

Original cost of DVD =

$41.60/$64 × 100 = $65

Lets the original price of the Stereo player was $100

We are told the price was marked down to 22%

22% of $100 = $22

$100 - $22 = $78

We are told the DVD cost $69.42 after the markdown.

Original cost of Stereo =

$69.42/$78 × 100 = $89

DVD = $65 - $41.60 = $23.40 less 

Stereo = $89 - 69.42 = $19.58 less

Difference between the DVD and the Stereo is

$23.40 - $19.58 = $3.82

Therefore,the DVD player's price was reduced by $3.82 more than the stereo tuner's price

Rounding $3.82 dollars to the nearest cents

$1 = 100 cents

$3.82 =

3.82 × 100 cents

= 382 cents

Answer:

The answer is A on edg 2020

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

Answer:It is not possible

Step-by-step explanation: It is not possible because we need 12 plot to solve for an accurate mean but there is only 11 data which is impossible.

Answer:

13

Step-by-step explanation:

The diagonals of rectangle are equal in length.

\(T(x,y)=(x+3,y-2)\)

Hope this helps.

Answer:

Rectangle and also parallelograms as well.

Step-by-step explanation:

Rectangles have two pairs and four right angles. So more than one.

Answer:

-Square

-Rectangle

-Rhombus

Answer:

Look below

Step-by-step explanation:

1) x = 14, because 14 * 14 = 196

2) x = 3 / 16, because ( 3 / 16 ) * ( 3 / 16 ) = 9 / 256

3) x = 8, because 8 * 8 * 8 = 512

4) x = 4 / 7, because ( 4 / 7 ) * ( 4 / 7 ) * ( 4 / 7 ) = 64 / 343

The region enclosed by the curves y = x, y = 3x, and y = -x + 4 needs to be sketched, and its area should be found.

To sketch the region enclosed by the curves, we need to plot the three given curves on a coordinate plane. The first curve is y = x, which represents a straight line passing through the origin (0,0) with a slope of 1. The second curve is y = 3x, which is also a straight line passing through the origin but with a steeper slope of 3. The third curve is y = -x + 4, which represents a line with a y-intercept of 4 and a negative slope of -1. By plotting these three lines on the same coordinate plane, we can see that they intersect at three points: (0,0), (1,3), and (3,1). The region enclosed by these curves is a triangular region with vertices at these three points. To find the area of this triangular region, we can use the formula for the area of a triangle: A = (1/2) * base * height. Let's draw the graph:

     |

   4 |         .  (2, 2)

     |      .

     |   .

     | .

   0 |_____________________

     0     1     2     3     4     5     6

In this graph, the first equation (y = x) is depicted by a diagonal line passing through the origin (0,0). The second equation (y = 3x) is a steeper line, while the third equation (y = -x + 4) is a downward-sloping line with a y-intercept of 4. In this case, the base of the triangle is the distance between the points (0,0) and (3,1), which is 3 units. The height of the triangle is the distance between the point (1,3) and the line y = -x + 4, which is also 3 units. Substituting these values into the area formula, we get A = (1/2) * 3 * 3 = 4.5 square units.

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Roads that are well-maintained, dry, and free from hazards are generally less likely to result in traction loss.

The likelihood of losing traction depends on various factors such as road conditions, weather, vehicle type, and driver behavior. However, in general, roads that are well-maintained, dry, and free from debris or hazards are less likely to result in traction loss. Additionally, roads with good grip surfaces, such as asphalt or concrete, tend to provide better traction compared to unpaved or slippery surfaces. It's important to drive cautiously and adapt to the specific conditions of the road to minimize the risk of losing traction.

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The student's lifetime value for a four-year degree at this college is $80,000.

The student's lifetime value for a four-year degree can be calculated as follows:

Determine the cost per semester: $10,000 per semester

Determine the number of semesters for a four-year degree: 4 years * 2 semesters/year = 8 semesters

Multiply the cost per semester by the number of semesters to get the total cost of tuition: $10,000 * 8 = $80,000

Therefore, the student's lifetime value for a four-year degree at this college is $80,000.

It is important to note that this calculation only considers the cost of tuition and does not take into account other costs such as room, board, books, and supplies, which can add significantly to the total cost of obtaining a degree.

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Answer:

its the first one

Step-by-step explanation:

In a quadratic function, the second differences are the same.

In the first table, the first differences are:

3-6 = -3;

2-3 = -1;

3-2 = 1;

6-3 = 3

The second differences are then:

-1--3 = 2;

1--1 = 2;

3-1 = 2

The second differences are the same, so this is a quadratic function.

The table has a greater rate of change.

The rates of change are equal.

In the given problem, we have a table showing the relationship between x and y values. By comparing the change in y with the change in x, we can determine the rate of change. Looking at the table, we observe that for every increase of 1 in x, there is a corresponding increase of 1 in y. Therefore, the rate of change for this table is 1.

The slopes are equal.

The equation has a greater slope.

In problem 2, we are given a linear equation in the form y = mx + b, where m represents the slope. The given equation is y = 2x + 7, which means the slope is 2. To compare the rates of change, we compare the slopes. If the slopes are equal, the rates of change are equal. In this case, the slopes are equal to 2, so the rates of change are the same.

The function rule has a greater slope.

The slopes are equal.

In problem 3, we are told that as x increases by 1, y increases by 3. This information gives us the rate of change between x and y. The slope of a function represents the rate of change, and in this case, the slope is 3. Comparing the slopes, we find that they are equal, as both have a value of 3. Therefore, the rates of change are the same.

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Sin x of the given triangle is \(\frac{6}{10}\) and the Sin y is \(\frac{4}{5}\)

Given data :

Sinθ =  \(\frac{Opposite leg }{hypotenuse}\)  = \(\frac{O}{H}\)

sin X = \(\frac{6}{10}\)

Sin y = \(\frac{sinx}{O}\)

= \(\frac{\frac{6}{10} }{8}\) = \(\frac{10}{8} * 6\)

= \(\frac{4}{5}\)

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9514 1404 393

Answer:

  an = 12(-1/2)^(n-1)

Step-by-step explanation:

Your sequence has a common ratio of ...

  r = -6/12 = 3/-6 = -1/2

The first term is 12.

The explicit formula for the general term of a geometric sequence with first term a1 and common ratio r is ...

  an = a1·r^(n-1)

Using the values for this sequence, the explicit formula you want is ...

  an = 12·(-1/2)^(n -1)

__

This could be rearranged to be ...

  an = -24·(-2)^(-n)

The independent set in a graph is a set of vertices that contain no edges. So, no neighboring vertices are included. The max independent set problem is to get an independent set of maximum size in graph G.

The solution for this question is discussed below:

a) The integer linear program for the max independent set problem is as follows:

maximize ∑x_i Subject to: x_i+x_j ≤ 1 {i,j} ∈ E;x_i ∈ {0, 1} ∀i. The variable x_i can represent whether the ith vertex is in the independent set. It can take on two values, either 0 or 1.

b) The LP relaxation for the max independent set problem is as follows:

Maximize ∑x_iSubject to:

xi+xj ≤ 1 ∀ {i, j} ∈ E;xi ≥ 0 ∀i. The variable xi can take on fractional values in the LP relaxation.

c) The family of graphs is as follows:

Consider a family of graphs G = (V, E) defined as follows. The vertex set V has n = 2^k vertices, where k is a positive integer. The set of edges E is defined as {uv:u, v ∈ {0, 1}^k and u≠v and u, v differ in precisely one coordinate}. It can be shown that the size of the max independent set is n/2. Using LP, the value can be determined. LP provides a value of approximately n/4. Therefore, the ratio LP-OPT/OPT is at least c/4. Therefore, the ratio is in for a constant c>0.

d) The size of a max-independent set is equivalent to the number of vertices minus the minimum vertex cover size.

e) The 2-approximation algorithm for vertex cover implies a 2-approximation algorithm for the max independent set.

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The maximum concentrated live load that can be applied at the free end of the beam without exceeding the maximum allowable stress in the extreme fibers is 100 kN.

In order to find the maximum concentrated live load that can be applied on the beam without the stress in the extreme fibers at the fixed end exceeding 0.45f'c for compression and 0.5√f'c for tension, the following steps can be taken:

1. First, the self-weight of the beam must be calculated.

The volume of the beam can be calculated as follows:

Volume = width x depth x length

= 0.25 m x 0.6 m x 6 m

= 0.9 m³The weight of the beam can be calculated as follows:

Weight = volume x unit weight

= 0.9 m³ x 25 kN/m³

= 22.5 kN

This weight will be distributed evenly along the length of the beam, so the distributed dead load on the beam is 5 kN/m + 22.5 kN/6 m

= 8.75 kN/m2.

Next, the bending moment due to the dead load must be calculated: MDL = wDL × L² / 8

= 8.75 kN/m × 6 m² / 8

= 31.5 kNm3. The eccentricity of the strands must be calculated: Eccentricity

= 150 mm

= 0.15 m4.

The area of the section must be calculated:

A = width x depth

= 0.25 m x 0.6 m

= 0.15 m²5.

The moment of inertia of the section must be calculated:

I = width x depth³ / 12

= 0.25 m x 0.6 m³ / 12

= 0.009 m⁴6.

The maximum allowable stress in the extreme fibers must be calculated:

For compression: fcd

= 0.45f'c

= 0.45 × 27 MPa

= 12.15 MPa

For tension:

fcd = 0.5√f'c

= 0.5√27 MPa

= 2.93 MPa7.

The maximum bending moment that the beam can withstand must be calculated:

MD = fcd × Z

= 12.15 MPa × 0.009 m⁴ / 0.15 m

= 0.77 kNm8.

The maximum live load that can be applied at the end of the beam must be calculated. This live load will cause a bending moment that will add to the moment due to the dead load. The maximum allowable stress in the extreme fibers will be reached when the maximum bending moment due to the live load is added to the moment due to the dead load.

The bending moment due to the live load can be calculated using the formula:

MLL = (4 × P × a × b) / L

Where P is the concentrated load, a is the distance from the end of the beam to the point of application of the load, b is the distance between the strands and the centroid of the section, and L is the length of the beam.

MLL = (4 × P × a × b) / LMD

= MDL + MLL0.77 kNm

= 31.5 kNm + (4 × P × 0.15 m × 0.25 m) / 6 mP

= (0.77 kNm - 31.5 kNm) × 6 m / (4 × 0.15 m × 0.25 m)P

= 100 kN

Therefore, the maximum concentrated live load that can be applied at the free end of the beam without exceeding the maximum allowable stress in the extreme fibers is 100 kN.

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Using the Euler method to solve the differential equation 2 dy/dx=x/y; y(0) = 1 with h = 0. The result improves with h = 0.05 as it is closer to the analytical solution.

The Euler method to solve the differential equation 2 dy/dx = x/y; y(0) = 1 with h = 0.1 is given as follows:

First, we have to calculate the slope. We get, 2 dy/dx = x/y=> 2 dy/y = dx/x

Integrating both sides, we get

ln |y| = (1/2) ln |x| + c

where c is a constant. Now, as y(0) = 1, we get

c = 0=> ln |y| = (1/2) ln |x|=> |y| = √|x|

As y > 0, we get

y = √x

Thus, y(1) = √1 = 1

Using the Euler method with h = 0.1, we get

y1 = y0 + h x f(x0, y0) = 1 + 0.1 x (1/1) = 1 + 0.1 = 1.1

Similarly, y2 = y1 + h x f(x1, y1) = 1.1 + 0.1 x (1/1.1) = 1.1 + 0.09091 = 1.19091 and so on...y(1) = y10 = 2.130488

Improve the result using h = 0.05, we get

y1 = y0 + h x f(x0, y0) = 1 + 0.05 x (1/1) = 1 + 0.05 = 1.05

Similarly, y2 = y1 + h x f(x1, y1) = 1.05 + 0.05 x (1/1.05) = 1.05 + 0.047619 = 1.097619 and so on...

y(1) = y20 = 1.658726

Comparing both the results with the analytical solution, we get

Analytical solution = √1 = 1

For h = 0.1, y(1) = 2.130488

For h = 0.05, y(1) = 1.658726

Therefore, the result improves with h = 0.05 as it is closer to the analytical solution.

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Answer: 96 servings.

Step-by-step explanation:
There are 16 cups in 1 gallon, so 3 gallons of punch would be equal to:

3 gallons x 16 cups/gallon = 48 cups

If each serving size is 1/2 cup, then the number of servings in 3 gallons of punch would be:

48 cups / (1/2 cup/serving) = 96 servings

Therefore, 3 gallons of punch would provide 96 servings, assuming each serving size is 1/2 cup.

Answer:

105 total

Step-by-step explanation:

Answer:

$105.66 is your answer.

Answer:

30x^4-115x^3+127x^2+115x+44

Step-by-step explanation:

This is what I got, let me know if I'm right.

Answer:

Centre = (-1, 5)

radius = 8units

Explanation

The standard form of the equation of a circle is expressed as

x^2+y^2+2gx+2fy+C = 0

Center = (-g, -f)

radius = √g²+f²-C

Given the equation of a circle is x² + y²+ 2x - 10y - 38 = 0.

On comparing

2gx = 2x

2g = 2

g = 2/2

g = 1

2fy = -10y

2f =-10

f =-5

Centre = (-1, -(-5)) = (-1, 5)

radius  = √1²+5²-(-38)

radius = √1+25+38

radius = √64

radius = 8units

Answer: $75

Step-by-step explanation:

Answer:

57/5

Step-by-step explanation:

what is that supposed to be ?

1.5 + 9.9 ?

I base my answer in that assumption.

1.5 = 3/2

9.9 = 99/10

so, we need 3/2 + 99/10.

how do we do that ?

by bringing both fractions to the same denominator (bottom parts) but without changing the value of the fractions. that means we need to multiply numerator and denominator (top and bottom parts) by the same factor. and that factor is determined by what is needed to transform the denominator.

we have denominators 2 and 10. what is the smallest common multiple ?

I think it is plainly visible : 10. as 2 also cleanly divides 10.

in other examples, if you don't see that right away, the simplest approach is to just multiply both denominators (in our case 2×10 = 20) and work with that result.

so, we are trying to bring both fractions to denominators of 10 (or, as mentioned 20), so that we can easily add the fractions.

let's start with 3/2.

what multiplication do we need to do to turn 2 into 10 ?

right, by multiplying by 5.

remember, we need to do the same thing to numerator and denominator to keep the value of the fraction unchanged.

so, we do the following

3/2 × 5/5

as you can see, multiplying something by 5/5 does not change any value, as it means we are just multiply by 1. but we can use that little trick to change the appearance of the original fraction.

so,

3/2 × 5/5 = (3×5) / (2×5) = 15/10

by the way, if we had wanted to change the denominator to 20, our factor would have been 10/10, and we would have gotten 30/20.

now to 99/10.

well, the denominator is already 10, so we don't need any transformation.

but if we had not seen that and went for 20 as desired denominator, we would have had to multiply by 2/2 giving us

198/20.

so, for the final sum :

15/10 + 99/10 = 114/10 = 57/5

and in case of 1/20th :

30/20 + 198/20 = 228/20 = 114/10 = 57/5

now, should that original problem have been

1/5 + 9/9 ?

the same principles apply.

bring both fractions to the same denominator.

9/9 = 1

and that can be transformed easily into any other denominator expression - like 5/5.

and then we have

1/5 + 5/5 = 6/5

but if we had not seen that simple approach, we could have turned both into fractions with denominator 5×9 = 45.

9/45 + 45/45 = 54/45 = 6/5

Answer:

7

Step-by-step explanation:

Answer:

Blank 1: $205.8

Blank 2: $388

Step-by-step explanation:

For blank 1, I added up the 4 numbers because that's what 1 month would cost for both services. For blank 2, I multiplied the monthly fee for each service separately by 12, for 12 months. After that, each equation still separate add the 1 time fee and subtract each company price and you will get your answer.

- I hope this is correct and helpful :)

Phone company costs for a 12-month period are 162 dollars cheaper than cable company costs.

Cable company Connection fee and hardware = 49.95 dollars

Cost of service = 45.95 dollars per month.

Cost for a 12-month period = (connection fee and hardware) + ((cost of service) x 12 months) Cost for a 12-month period = 49.95 dollars + (45.95 dollars per month x 12 months) Cost for a 12-month period = 49.95 dollars + 551.40 dollars Cost for a 12-month period = 601.35 dollars

Phone company Connection fee and hardware = 79.95 dollars Cost of service = 29.95 dollars per month

Cost for a 12-month period = (connection fee and hardware) + ((cost of service) x 12 months) Cost for a 12-month period = 79.95 dollars + (29.95 dollars per month x 12 months) Cost for a 12-month period = 79.95 dollars + 359.40 dollars Cost for a 12-month period = 439.35 dollars Difference in the cost = (cable company cost) - (phone company cost) Difference in the cost = 601.35 dollars - 439.35 dollars Difference in the cost = 162 dollars

Phone company costs for a 12-month period are 162 dollars cheaper than cable company costs.

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The matrix's entry of 1.00 on the diagonal denotes that it is an identity matrix, which means that all values besides 1 along the diagonal are 0.

The matrix is an identity matrix, as evidenced by the entry of 1.00 on its diagonal. A square matrix called an identity matrix is one in which the primary diagonal's elements are all ones and the other components are all zeros. The letter "I" stands for this particular sort of matrix. In several branches of mathematics, such as matrix theory and linear algebra, identity matrices are employed. Calculations and equations can also be made simpler by using identity matrices. An identity matrix, for instance, is created by multiplying it by any other matrix. This characteristic can be used for matrix inversion or to solve a set of linear equations. In group theory and abstract algebra, the identity element is also represented by identity matrices.

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Step-by-step explanation:

the slope = (0+6)/(-1+7) = 6/6 = 1

the Equation :

y-0 = 1(x+1)

y = x + 1

The angle ∅ to the nearest tenth is 51.8 degrees.

The trigonometric ratio can be solved as follows:

tan ∅  = 14 / 11

We are asked to solve for the angle ∅.

Therefore,

tan ∅  = 14 / 11

∅ = tan⁻¹ 14 / 11

Hence,

∅ = tan⁻¹ 1.27272727273

∅ = 51.8421769502

Therefore,

∅ = 51.8 degrees

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To use the quadratic formula, we need to identify the values of a, b, and c.

1. In this case, the equation is 4x² - 3x - 8 = 0, so a = 4, b = -3, and c = -8.

2. x = (-b ±√(b² - 4ac))/2a.

3.  x = (3 ±√137)/8.

The Quadratic Formula is a mathematical equation used to solve second-degree equations.

To use the quadratic formula, we need to identify the values of a, b, and c in the equation ax² + bx + c = 0.

In this case, the equation is

4x² - 3x - 8 = 0,

so a = 4, b = -3, and c = -8.

Once the values of a, b, and c are known, we can substitute them into the Quadratic Formula:

x = (-b ±√(b² - 4ac))/2a.

In this equation, a = 4, b = -3, and c = -8, so the equation becomes

x = (-(-3) ±√((-3)² - 4(4)(-8)))/2(4).

Simplifying, we get x = (3 ±√(9 + 128))/8.

Finally, solving for x yields x = (3 ±√137)/8.

Therefore, the solution to the equation is

x = (3 ±√137)/8.

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Answer:

p= 1125

Step-by-step explanation:

p-275= 850

p- 275= 850

  + 275  +275

p= 1125

P= the original population minus D= decrease in population is equal to C= the current population

p-d=c

Answer:

1125 people

Step-by-step explanation:

We don't know the exact quantity, but we know it has decreased by 275 and it's currently 850, so we will represent it like this:

x - 275 = 850

x = original amount of people

Now we just solve it like any equation

x = 850 + 275

x = 1125

Hope it was helpful ;)