The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 21 HCF of water is
$35.39, and the cost for using 57 HCF is $83.99. What is the cost for using 56 HCF of water?
Monthly cost
(in dollars)
Water usage
(In HCF)
E

There were 240 pages in the printer task.

To find the number of pages in the printing task, we can use the relationship between time, rate, and work. The formula for this is:

   time × rate = work.

Let's call the number of pages in the printing task "P" and the rate of printer A "R". We can set up the following equations based on the information given in the question:

   40 minutes × R = P(R + 4) × (40 - 16) = P

We can simplify the second equation to get:

    24R + 96 = P

Now we can set the two equations equal to each other and solve for R:

    40R = 24R + 96

    16R = 96

     R = 6

Now we can plug this value of R back into one of the original equations to find P:

     40 minutes × 6 = P

      P = 240

Therefore, the number of pages in the printing task was 240.

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The length of the escalator, considering the trigonometric ratios, is of

38.1 ft.

The three trigonometric ratios are the sine, the cosine and the tangent, and they are defined as follows:

For the angle of 30º, we have that:

Hence the length of the escalator is obtained with the tangent as follows:

tan(30º) = 22/l

l = 22/tangent of 30 degrees

l = 38.1 ft.

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Answer:

Step-by-step explanation:

its is 192 ft2

The statement  ((1)/(x))^(n)>(1)/(x)  is FALSE as (1)/(x^n) will always be smaller than (1)/(x).

To evaluate this expression, let's look at the properties of exponents. When we have a fraction raised to a power, it is equivalent to raising both the numerator and denominator to that power.

So, ((1)/(x))^(n) is equivalent to (1^n)/(x^n), which simplifies to (1)/(x^n).

Now, let's compare (1)/(x^n) to (1)/(x). Since x is positive and n is a natural number excluding zero, x^n will always be greater than x.

For example, if x=2 and n=3, then x^n=8 and (1)/(x^n)=(1)/(8) while (1)/(x)=(1)/(2).

So, (1)/(x^n) will always be smaller than (1)/(x).

Therefore, the statement ((1)/(x))^(n)>(1)/(x) is FALSE.

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Answer:

15.2

Step-by-step explanation:

[tex]x^{2} =8.7^{2}+12.5^{2} \\x^{2} =231.94\\x=15.229...\\x=15.2[/tex]

10 pounds of chocolates and 5 pounds of other candy.

To solve this problem, we need to use a system of equations. Let x be the amount of chocolates in the mixture and y be the amount of other candy in the mixture. We can write the following equations:

x + y = 15 (the total amount of candy in the mixture is 15 pounds)
1.80x + 3.00y = 2.20(15) (the total value of the candy in the mixture is $2.20 per pound)

Now we can solve for one of the variables in terms of the other. From the first equation, we can isolate y:

y = 15 - x

Substituting this into the second equation gives us:

1.80x + 3.00(15 - x) = 2.20(15)

Simplifying and solving for x gives us:

1.80x + 45 - 3.00x = 33
-1.20x = -12
x = 10

Now we can plug this value of x back into the first equation to find y:

y = 15 - 10 = 5

So there are 10 pounds of chocolates and 5 pounds of other candy in the mixture.

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The 12th term of the geometric sequence 2, -12, 8, ... is -111,974,400.

A geometric progression is a sequence of numbers in which each term after the first is found by multiplying the preceding term by a fixed number, called the common ratio.

To find the 12th term of the geometric sequence, we need to use the formula:

[tex]an = a1 * r^{(n-1)[/tex]

where:

an = the nth term

a1 = the first term

r = the common ratio

We can see that the common ratio is -6, since:

-12/2 = 8/-12 = -6

So, we have:

[tex]a12 = 2 * (-6)^{(12-1)[/tex]

[tex]a12 = 2 * (-6)^{11}[/tex]

a12 = -111,974,400

Therefore, the 12th term of the geometric sequence 2, -12, 8, ... is -111,974,400.

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Answer:

+- .35

Step-by-step explanation:

8x² - 1 = 0

8x² = 1

x² = 1/8

x = √1/8

x = +- .35

The fully factored form of 8v - 6vw + 4 - 3w is (2v + 1)(4 - 3w).

From the question, we have the following parameters that can be used in our computation:

8v - 6vw + 4 - 3w​

To factor by grouping, we'll group the first two terms and the last two terms:

(8v - 6vw) + (4 - 3w)

Next, we'll factor out the greatest common factor (GCF) from each group:

2v(4 - 3w) + 1(4 - 3w)

Notice that both groups now have a common factor of (4 - 3w), which we can factor out:

(2v + 1)(4 - 3w)

Hence, the factored expression is (2v + 1)(4 - 3w)

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Answer: AD/DB = {AB/BD} = {DA/DB}

AD/AB = {DB/AB} = {DA/DB}

DB/AB = {AD/AB} = {BD/DA}

Cοrmac cοuld use 1/3 cup οf milk and 1 1/2 cups οf water, a mixture with a tοtal οf 1 5/6 cups, where the amοunt οf milk is less than 1/2 the amοunt οf water, represented by the sοlutiοn pοint (1/3, 1 1/2) tο the system οf inequalities x + y <= 2 and x < 1/2 * y.

An inequality is a mathematical statement that cοmpares twο values, expressing the relatiοnship between them using οne οf several symbοls, such as "<" (less than), ">" (greater than), "<=" (less than οr equal tο), ">=" (greater than οr equal tο), οr "!=" (nοt equal tο).

The pοint (1/3, 1 1/2) is a sοlutiοn tο Cοrmac's system οf inequalities, which means that it satisfies bοth inequalities. In this case, the inequalities are:

x + y <= 2

x < 1/2 * y

If we plug in x = 1/3 and y = 1 1/2, we can check if it satisfies bοth inequalities:

1/3 + 1 1/2 = 2 (satisfies x + y <= 2)

1/3 < 1/2 * (1 1/2) (satisfies x < 1/2 * y)

Therefοre, the sοlutiοn is (1/3, 1 1/2) since it satisfies bοth inequalities.

Sο, the statement that explains what the pοint (1/3, 1 1/2) represents is:

Cοrmac cοuld use 1/3 cup οf milk and 1 1/2 cups οf water, a mixture with a tοtal οf 1 5/6 cups, where the amοunt οf milk is less than 1/2 the amοunt οf water.

Hence, Cοrmac cοuld use 1/3 cup οf milk and 1 1/2 cups οf water, a mixture with a tοtal οf 1 5/6 cups, where the amοunt οf milk is less than 1/2 the amοunt οf water, represented by the sοlutiοn pοint (1/3, 1 1/2) tο the system οf inequalities x + y <= 2 and x < 1/2 * y.

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The percent of change from 4/3 to 3/5 is 6.1%

To find the percent of change from 4/3 to 3/5, we'll use the following formula:

Percent change = ((Old value - New value) / old value) x 100%

First, we'll identify which value is the old value and which is the new value.

The old value is 4/3 and the new value is 3/5.

Substitute the known values in the above equation, so, we have the following representation

Percent change = ((4/3 - 3/5) / 4/3) x 100%

Evaluate

Percent change = 6.1%

Hence, the percent change is 6.1%

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Answer:

Step-by-step explanation:

i dk

The sum of two exponentials is given by:

A e^(jφ) + B e^(jψ) = (Acosφ + Bcosψ) + j(Asinφ + Bsinψ)

Applying this formula to the given problem:

[tex]33.65 e^{j(377t-25.5)} + 31.39 e^{j(377t+172.8)}[/tex]

[tex]= (33.65cos(377t-25.5) + 31.39cos(377t+172.8)) + j(33.65sin(377t-25.5) + 31.39sin(377t+172.8))[/tex]

This is the final answer, expressed in rectangular form with real and imaginary parts.

In words, the sum of the two exponentials is a complex number with a real part equal to the sum of the cosines of the two phases and an imaginary part equal to the sum of the sines of the two phases. The phase angle of the resulting complex number is determined by the weighted sum of the two original phase angles.

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The formula that expresses R as a function of M and S is R = (M - 2S)/2.

To write a formula that expresses R as a function of M and S, we will need to rearrange the equation M=2R+2S to solve for R.

First, we will subtract 2S from both sides of the equation to isolate the term with R on one side:
M - 2S = 2R

Next, we will divide both sides of the equation by 2 to solve for R:
(M - 2S)/2 = R

Finally, we can write the equation in function form, with R as the dependent variable and M and S as the independent variables:
R = (M - 2S)/2

Therefore, the formula that expresses R as a function of M and S is R = (M - 2S)/2.

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Kevin's assertion is untrue. The perimeter of two rectangles can be the same although their lengths and widths differ.

The area of a planar figure is the space enclosed by its perimeter. An enclosed figure's area is the total number of unit squares that completely encircle its surface. Cm2 and m2 are two square measures. Only two dimensions are available for measuring a shape's area.

Kevin's claim is incorrect. Two rectangles can have the same perimeter but different lengths and widths.

For example, consider two rectangles with perimeters of 26 meters:

Rectangle A: Length = 8 meters, Width = 5 meters

Rectangle B: Length = 9 meters, Width = 4 meters

Both rectangles have a perimeter of 26 meters (8+5+8+5=26 and 9+4+9+4=26), but they have different lengths and widths.

Kevin's claim is not true in general.

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Yes, I am sceptical of my friend's claim that Class 2022 did better than Class 2023 in the Final Test because the mean score only tells us the average score of the students in each class. It does not give us the full picture of how the students in each class performed in the Final Test.

To better compare the performance of the two classes, we need to look at other measures of central tendency, such as the median and mode, as well as measures of dispersion, such as the range, variance, and standard deviation. These measures will give us a better understanding of the distribution of scores in each class and allow us to make a more accurate comparison.

For example, if the range of scores in Class 2022 is much larger than the range of scores in Class 2023, it could indicate that there were a few students in Class 2022 who scored very high, which skewed the mean score upward. In this case, the median and mode may be a better measure of central tendency for comparing the two classes.

Similarly, if the variance and standard deviation of scores in Class 2022 are much larger than those in Class 2023, it could indicate that there is more variability in the scores of students in Class 2022, which could also skew the mean score upward.

In conclusion, while the mean score is a useful measure of central tendency, it should not be used alone to compare the performance of two classes. Other measures of central tendency and dispersion should also be considered to get a more accurate comparison.

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Answer: 10y - 3

Step-by-step explanation:

We just add the "+" sign between the two.

So we get:

8y - 6 + 2y + 3

The y terms are like, so we do :

(8y + 2y) - 6 + 3

Which is:

10y - 6 + 3

The integers are like (common), so we do:

10y (-6 + 3)

Which is :

10y - 3    

It is - 3 because -6 + 3 = -3, and we also add the "-" with the integer

So our final answer is=

10y - 3

The vertex of the function is (2 , -5), the axis of symmetry is x = 2, and the intercepts are (2 + √(5) , 0), (2 - √(5) , 0), and (0 , -1).

To find the vertex, axis of symmetry, and intercepts of the function f(x) = x² - 4x - 1, we can use the following formulas:

Vertex: (-b/2a, f(-b/2a))

Axis of symmetry: x = -b/2a

Intercepts:

x-intercept: set f(x) = 0 and solve for x

y-intercept: set x = 0 and solve for y

Using these formulas, we can find the vertex, axis of symmetry, and intercepts of the function:

f(x) = x² - 4x - 1

a = 1, b = -4, c = -1

Vertex: (-b/2a , f(-b/2a)) = (-(-4)/(2)(1) , f(-(-4)/(2)(1))) = (2 , f(2)) = (2 , (2)² - 4(2) - 1) = (2 , -5)

Axis of symmetry: x = -b/2a = -(-4)/(2)(1) = 2

Intercepts:

x-intercept: 0 = x² - 4x - 1

use the quadratic formula to solve for x: x = (-b ± √(b² - 4ac))/(2a) = (-(-4) ± √((-4)² - 4(1)(-1)))/(2(1)) = (4 ± √(20))/2 = (4 ± 2√(5))/2 = 2 ± √(5)

so the x-intercepts are (2 + √(5) , 0) and (2 - √(5) , 0)

y-intercept: f(0) = (0)² - 4(0) - 1 = -1; so the y-intercept is (0 , -1)

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14) all triangles add up to 180 degrees.

for example: c - 40 + 40 = 80; 180-80 = 100

16)

a. EF

b. E

c. A

Table showing relation of points and coins is as in the solution, graph is straight line p = 15c+5, drawn and attached below. y-intercept is (0,5).

A table has records (rows) and fields (columns). Fields have different data types. as Text, Numbers, Dates, and Hyperlinks. record: It contains certain data, such as information about specific employees or products.

Given,

In a video game, player earns 5 points for reaching next level

15 points are for each coin collected

when player has 1 coin, number of points

= 15 + 5

= 20

when player has 2 coin, number of points

= 2(15) + 5

= 35

Equation for c coins, number of points

p = 15c + 5

Table can be created as follows:

Coins(c)  Points()

0                 5

1                 15

2                35

3                 50

4                 65

5                 80

6                 95

7                  110

8                  125

Graph is a straight line, y-intercept is (0,5).

Hence, table of the relationship of points and coins is

Coins  0   1    2    3     4    5    6    7      8

Points 5  15  35  50  65  80  95  110   125

Graph of the data is an straight line p = 15c + 5, (0,5) is y-intercept.

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Answer:

We can start by using the slope formula to find the equation of the line:

slope = (change in y) / (change in x)

We know the slope is 4, so we can plug in the coordinates (-10, 15) and (x/2, 7) to solve for x:

4 = (15 - 7) / (-10 - x/2)

Multiplying both sides by (-10 - x/2) gives:

-40 - 2x = 8

Solving for x, we get:

x = -24

Therefore, the missing x-value for the coordinate point is -24.

Step-by-step explanation:

13. The reasonable domain for the function V(w) = (60-4w)w^2 is when the volume is greater than 0.

14. The graph will look like a parabola with a maximum point at w = 7.5.

15.The coordinates of the maximum point are (7.5, 506.25).
16. The width of the box that produces the maximum volume is 7.5 inches, as found in the previous question.

17. a. The expression for the height of the tube in terms of the radius is h = 60 - 2r.

This means that the values of w must be between 0 and 15, since the volume becomes negative when w is greater than 15. Therefore, the domain can be expressed as an inequality as 0 < w < 15, in interval notation as (0, 15), and in set notation as {w | 0 < w < 15}.

14. To sketch a graph of the function V(w) = (60-4w)w^2 over the domain (0, 15), we can plot points at different values of w and connect them with a smooth curve. The scale on each axis can be 1 unit per grid line.

15. Using a graphing calculator, we can find the coordinates of the maximum point of the function V(w) = (60-4w)w^2 by using the maximum function.

b. The expression for the volume of the tube in terms of the radius is V = πr^2h = πr^2(60 - 2r).

c. To find the radius that produces the maximum volume, we can take the derivative of the volume function and set it equal to 0. This gives us 2πr(60 - 4r) = 0. Solving for r, we get r = 7.5 cm.

d. The maximum volume of the tube is V = π(7.5)^2(60 - 2(7.5)) = 1265.49 cm^3.

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We have proven that in given triangle ∠BACB is congruent to ∠DECD, as required.

Similarity of triangles refers to the property of having the same shape but not necessarily the same size. Two triangles are similar if their corresponding angles are congruent and their corresponding sides are proportional.

To prove: ∠BACB = ∠DECD

We know that, BD ∥ AE and C is the midpoint of AE.

Therefore, triangle ACE and triangle BCD are similar by the Converse of the Corresponding Angles Postulate. Hence, we have:

∠CAB = ∠CBD .... (1) (corresponding angles)

∠CAE = ∠CDB .... (2) (corresponding angles)

Also, we know that in triangle ACE, angles 3 and 4 are alternate interior angles formed by a transversal. Therefore, angles 3 and 4 are congruent. Similarly, in triangle BCD, angles 1 and 2 are congruent.

Therefore, we can write:

∠ACB = ∠BCD .... (3) (angles of similar triangles)

Adding equations (1) and (3), we get:

∠BACB = ∠DECD

Hence, we have proven that ∠BACB is congruent to ∠DECD, as required.

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The required scale factor of the dilation, between the triangles, is 3/4.2.

Transform the shapes on a coordinate plane by rotating, reflecting, or translating them. Felix Klein introduced transformational geometry, a fresh viewpoint on geometry, in the 19th century.

Here,
To determine, a sequence of rigid transformations that could take one triangle to another.

Since as we can see, the triangles have certain dilation, translation, and reflection. As for the data given, we can only calculate the dilation factor or scale factor only.

So,
Scale factor = Length of the one side of 1st triangle/length of 2nd triangle.

Scale factor = 6/8.4
Scale factor = 3/4.2

Thus, the required scale factor of the dilation, between the triangles is 3/4.2.

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Answer:

To find f(-2), we substitute -2 for x in the expression for f(x) and simplify:

f(x) = x³ - 3x

f(-2) = (-2)³ - 3(-2)

f(-2) = -8 + 6

f(-2) = -2

Therefore, f(-2) = -2.

Step-by-step explanation:

2023

The equation represents a linear function, as it is a proportional relationship, and thus the rate of change of the output variable relative to the input variable is constant.

A proportional relationship is defined according to the equation presented as follows:

y = kx.

In which k is the constant of proportionality, representing the increase in the output variable y when the constant variable x is increased by one.

A proportional relationship is a special case of a linear function, as it has an intercept of zero.

The equation for this problem is given as follows:

t = 10.8w.

Which is a proportional relationship with a constant of 10.8.

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Two parts of a family budget is Income and expenses. The correct option is c.

The fundamental family budgets cover housing, food, childcare, transportation, health care, other necessities, and taxes.

It's easy to understand the difference between income and expenses: income refers to the funds your organisation receives, whereas expenses refer to the funds it spends.

Net income is typically defined as your revenue, or the total amount of money coming into your business, minus all of your expenses. Your company is profitable if that number is positive.

Therefore, the correct option is c. Income and expenses.

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Complete question:

What are the two parts of a family budget?

Responses:

Answer:

4

Step-by-step explanation:

Five students shared 30 questions by receiving an unknown number of questions each followed by 2 questions each

Let that unknown number be x

Let the second set of questions be 10 (5x2)

5x +10=30

Subract 10 from both sides

5x = 20

Divide both sides by 5

X=4

The teacher assigned each student 4 questions each (4 x 5=20)