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Solve and explain

Thus, the computer was initially worth $3340 as the PC will be worth $835 after six years.

In mathematics, the unitary approach entails determining the value of a single unit in a certain circumstance and using that value to resolve other issues that are connected to it. It is a quick and efficient method for handling issues involving direct proportion, indirect proportion, and other circumstances of a same nature. In disciplines including mathematics, science, business, and engineering, the unitary technique is widely employed.

given

Let V be the computer's starting value.

The computer's value drops to V/2 after four years.

The computer's value is decreased to V/2 1/2 = V/4 after six years.

We are informed that the PC will be worth $835 after six years. When we set this equal to V/4, we obtain:

V/4 = 835

Adding 4 to both sides results in:

V = 4 × 835 = $3340

Thus, the computer was initially worth $3340 as the PC will be worth $835 after six years.

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Answer:

Step-by-step explanation:well work it out use ur brain

Answer:

Step-by-step explanation:you need to multiply 120x40=20 your get $2,408

Answer:

1440000

Step-by-step explanation:

Since for every mile, there are 12 people, we have 120000 miles. If we multiply 12 by 120000, we get 1440000.

Germany and Japan have been profound and long-lasting, these countries have developed in the years since the war.

The 20th century saw numerous wars that had a significant impact on the global political landscape. The two countries in question, let us assume, are Germany and Japan.

During World War II, these two countries were on the same side, the Axis powers, and were both defeated by the Allies.

As a result of this war, both countries experienced a range of political repercussions.

In the aftermath of the war,

both countries were occupied by Allied powers, with the United States occupying Japan and Germany being divided into four separate zones of occupation, each controlled by a different Allied power.  

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A gallon of milk is approximately 4 liters. 250 gallon containers of air will it take to full one cubic meter.

The setup for calculating how many gallon containers of air it will take to fill one cubic meter is:

1 m³ × 1000 L/m³ ÷ 4 L

A gallon of milk is approximately equal to 4 liters.

1 cubic meter (1 m³) of air is equal to 1000 liters.

One cubic foot of water contains 7.48 gallons. Dividing the total number of gallons by 7.48 will get the cubic feet equivalent.

To convert liters to gallons,

divide by 4 (since 1 gallon is approximately equal to 4 liters).

The calculation for how many gallon containers of air it will take to fill one cubic meter is:

1 m³ × 1000 L/m³ ÷ 4 L = 250 gallons.

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For each increase of one unit on the x-axis (the horizontal axis), the amount on the y-axis (the vertical axis) increases by the slope of the line.

Slope is the amount of change in the y-axis that occurs as a result of a one-unit change in the x-axis. It is also known as the rise over run.

A positive slope indicates that the line rises from left to right, while a negative slope indicates that the line falls from left to right. If the slope is zero, the line is horizontal.

The slope of a horizontal line is zero, and the slope of a vertical line is undefined because the x or y coordinate does not change as the other changes.

Therefore, the slope of a line represents the amount by which the value on the y-axis increases for every increase of one unit on the x-axis

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Answer:

5x1x5=712343x12x67=800

Step-by-step explanation:

Answer:

y = 5x

Step-by-step explanation:

y = water used (gal)

t = time (min)

y = 5x

This means for every minute, 5 gallons of water is used

Answer:

-45

Step-by-step explanation:

The area of the figure composing of a rectangle and a semi-circle is 105.12 ft².

The figure in the image composes of a rectangle and a semi-circle.

The area of a rectangle is expressed as;

Area = Length × Width

The area of a semi-circle is expressed as;

Area = 1/2 × πr²

First, we find the area of the rectangle.

Area = Length × Width

Plug in Length = 10ft and Width = 8ft

Area = 10ft × 8ft

Area = 80ft²

Next, find the area of the semi-circle.

Area = 1/2 × πr²

Since diameter = 8ft, radius r = diameter/2 = 8ft/2 = 4ft

Area = 1/2 × 3.14 × (4ft)²

Area = 1/2 × 3.14 × 16 ft²

Area = 25.12 ft²

Now, area of the composite figure will be:

Area of the rectangle + Area of the semi-circle.

Area = 80ft² + 25.12 ft²

Area = 105.12 ft²

Therefore, the area of the figure is 105.12 ft².

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Answer:

The solutions to the equation x² = 196 are:

x = 14 or x = -14

Therefore, the smallest answer is -14 and the largest answer is 14.

X = -14 or 14

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Answer:

20 percent off depends on the original cost: Take the original number and divide it by 10. Double your new number. Subtract your doubled number from the original number. You have taken 20 percent off! For $30, you should have $24.

Step-by-step explanation:

To find the probability that at least one of the two cards drawn from a standard deck of 52 playing cards is a spade, we can use the complement rule.

The complement of the event "at least one of the cards is a spade" is "neither of the cards is a spade."

To find the probability that neither of the two cards is a spade, we can multiply the probabilities of drawing a non-spade on the first card and a non-spade on the second card:

P(neither is spade) = (39/52) x (38/51) = 0.4498 (rounded to four decimal places)

P(at least one is spade) = 1 - P(neither is spade)

P(at least one is spade) = 1 - 0.4498

P(at least one is spade) = 0.5502 (rounded to four decimal places)

Therefore, the probability that at least one of the two cards drawn from a standard deck of 52 playing cards is a spade is 0.5502 or approximately 55.02%.

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Answer:

£164.50

Step-by-step explanation:

If the discount is 6%, then the discounted price is 94% of the original price.

95% of £175 = 0.94 × £175 = £164.50

The area of the piece of art is 448 square inches.

Shiloh made a scale drawing of a triangular piece of art.

Shiloh used a scale factor of 4 when making her drawing.

If the base and the height of Shiloh's drawing are 7 inches and 2 inches respectively,

what is the area of the piece of art?

Shiloh used a scale factor of 4 when making her drawing.

Therefore, the actual dimensions of the original triangular piece are four times the dimensions of the scaled drawing. Thus, the actual dimensions of the base and the height of the triangular piece are, respectively:

4 × 7 = 28 inches and 4 × 2 = 8 inches.

Using the formula for the area of a triangle,

we can find the area of the triangular piece.

The formula is given as A=12bh where b is the base and h is the height.

A = 12 × 28 × 8A = 112 × 4A = 448

Therefore, the area of the piece of art is 448 square inches.

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Answer:

105

Step-by-step explanation:

10² is 100

100+5=105

The probability of selecting a vowel from a hat with letters of the alphabet is 5/26 or approximately 0.1923. There are 5 vowels and 26 total letters.

There are 5 vowels in the English alphabet: A, E, I, O, and U. Therefore, the number of favorable outcomes (i.e., the number of vowels in the hat) is 5.

There are a total of 26 letters in the English alphabet. Therefore, the number of possible outcomes (i.e., the number of letters in the hat) is 26.

The probability of selecting a vowel is the ratio of the number of favorable outcomes to the number of possible outcomes:

P(vowel) = number of favorable outcomes / number of possible outcomes

P(vowel) = 5 / 26

Therefore, the probability of selecting a vowel is 5/26 or approximately 0.1923 (rounded to four decimal places).

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Answer:

5

26

5/26

19

Step-by-step explanation:

Because the critical region is all on one side in a one-tailed test and needs to be split between the two tails in a two-tailed test.

In a one-tailed test, the alternative hypothesis is directional and the critical region is all on one side of the distribution. In a two-tailed test, the alternative hypothesis is non-directional and the critical region is split between the two tails of the distribution.

It is easier to reject the null hypothesis with a one-tailed test because the critical region is all on one side of the distribution, making it more likely to observe a significant difference and reject the null hypothesis. In contrast, the critical region is split between the two tails in a two-tailed test, making it less likely to observe a significant difference and reject the null hypothesis.

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Answer:10,400

Step-by-step explanation:

Around noon, when the forecast temperature is about 4 degrees Celsius higher than the measured temperature, the difference is at its greatest.

The strength and direction of the linear connection between two variables are measured by the correlation coefficient. Its value goes from -1 to 1, and it is represented by the symbol "r". A perfect negative correlation, or r = -1, implies that as one variable rises, the other variable falls in an exact predictable manner. There is no linear relationship between the two variables if r = 0, which implies there is no correlation between the two variables. When r = 1, there is a perfect positive correlation, meaning that when one measure rises, the other rises in an exact predictable manner.

given

The maximum temperature for a specific day is shown in the provided image alongside the predicted maximum temperature.

The blue line depicts the expected maximum temperature, while the red line depicts the actual maximum temperature.

We can see that throughout the day, the forecast temperature is typically greater than the actual temperature.

Around noon, when the forecast temperature is about 4 degrees Celsius higher than the measured temperature, the difference is at its greatest.

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Answer:

180 dollars

Step-by-step explanation:

270 for 16 hours = 16.875 dollars for each hour

15.00 an hour will be paid to larry

larry is doing 3/4 of those 16 hours

12 hours

15 x 12

larry gets 180 dollars for 12 hours of work

hope this helps x

In the following question, among the given options, The statement "In a meta-analysis, there is a manipulation of variables" is false. hence meaning that the rest of them are stated to be true.

In A meta-analysis is a statistical technique for synthesizing the findings of multiple studies. It involves combining the results from multiple studies, analyzing them, and presenting a summary of the overall evidence. It does not involve manipulating variables or performing a random assignment. In a meta-analysis, any amount of studies can be used, and researchers can look for gaps in the research, based on a statistical analysis.

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Answer:

11.  17

12.  -16

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

I just did the test

Answer:

The effect on the graph of the function f(x) = 2^x when f(x) is replaced with f(x − 3) is that it translates horizontally 3 units right.

When a function is replaced with f(x - c), where c is a positive constant, the graph of the function shifts horizontally c units to the right. Similarly, if c is negative, the graph shifts horizontally c units to the left.

Therefore, replacing f(x) with f(x - 3) in the function f(x) = 2^x shifts the graph of the function horizontally by 3 units to the right.

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Answer: 900,012

Step-by-step explanation:

Answer: 900,012

this is because, nine hundred thousand is shown as 900,000 in number form

and then you just add 12 to that number, making it 900,012

Answer:

  5. 3 cm × 2 cm × 7 cm

  6. f(x) = x³ -3x² -x +3

Step-by-step explanation:

You want the dimensions of a cuboid with edges marked (x-1), (x-2), and (x+3) and a volume of 42 cm³. You also want the coefficients of a monic cubic f(x) with values f(2) = -3, f(-3) = -48, and f(-1) = f(1).

The volume of the cuboid is the product of its dimensions, so we have ...

  V = LWH

  42 = (x -1)(x -2)(x +3)

The value of x can be found as the solution to this equation. A graphical solution is attached. It shows x=4, so the dimensions are ...

  4 -1 = 3

  4 -2 = 2

  4 +3 = 7

The dimensions of the cuboid are 3 cm by 2 cm by 7 cm.

Note that the prime factors of 42 are 2, 3, 7, which have the required differences. You don't really need a polynomial to guess these are the dimensions.

The expanded polynomial is x³ -7x -36 = 0, so potential rational roots will be from the set {1, 2, 3, 4, 6, 9, 12, 18, 36}. An estimate of the upper bound of the real root puts it at ∛36 +√7 ≈ 5.9. We require x > 2, so the viable choices for testing are 3 and 4. x=4 is the solution.

The remainder theorem tells you that the remainder from dividing f(x) by (x-a) is f(a). To obtain linear equations in b, c, d, we can rearrange the function to ...

  bx² +cx +d = -x³ +f(x)

For x = ±1, we know the remainders f(x) are the same, so we can look at the difference of the equations for these x-values.

  (b(-1)² +c(-1) +d) - (b(1)² +c(1) +d) = (-(-1)³ +f(-1)) - (-(1)³ +f(1))

  b -b -c -c +d -d = 1 -(-1)

  -2c = 2

We can fill in values x=2, x=-3 to get two more equations in b, c, d. The coefficients of the three equations we have for the three unknowns are shown in the second attachment. The third attachment shows the solution of these equations is (b, c, d) = (-3, -1, 3).

The table in the first attachment confirms the remainders using these coefficients.

__

Additional comment

For problem 6, we started out using synthetic division, then realized the resulting equations are the same as those developed using the rearranged form shown above. We like to let calculators and spreadsheets do the tedious arithmetic where possible.

Answer:

5)The dimensions of the rectangular prism are 3 , 7 and 2.

6) f(x) = x³ - 3x² - x + 3

Step-by-step explanation:

5) The volume of rectangular prism = l*w*h.

    l*w*h= 42

(x- 1)(x -2)(x+3) = 42

We can find (x - 2) *(x + 3) using the identity (x + a)(x + b) = x² + (a +b)*x + ab

(x - 2)(x + 3) =x² + (-2 +3)x + (-3)*2

                   = x² + 1x - 6

(x -1)(x + 3)(x - 2) = 42

(x - 1)(x² + x - 6) = 42

x*x² + x*x - 6*x + (-1)*x² + (-1) *x + (-1)(-6) = 42

x³ + x² - 6x - x² - x + 6 - 42 = 0

x³ + x² - x² - 6x - x + 6 -42 = 0

Combine the like terms,

   x³ - 7x - 36 = 0

Find the zeros of the cubic polynomial by synthetic division method.

     4       1       0      -7      -36

                      4       16       36

              1       4       9          0

x - 4 is zero of the polynomial.  

Ignore the quadratic polynomial x² + 4x  + 9 as it will have irrational roots(zeros) and dimensions will be always positive integer.

x - 4 = 0

x = 4

length =  x - 1     =  4 - 1 = 3

Width  =   x + 3 = 4 + 3 = 7

Height =  x - 2 = 4 - 2  = 2

The dimensions of the rectangular prism are 3 , 7 and 2.

6)   f(x) = x³ + bx² + cx + d

It is given that when f(x) is dived by x + 1 and x- 1, the remainders are same.

   x + 1 = 0              ; x - 1 = 0

         x = -1             ;      x = 1

                       f(-1) =  f(1)

         -1 + b -  c + d = 1 + b + c + d

-1 -1 + b - b - c - c + d - d = 0

                -2 - 2c             = 0

                                   -2c = 2

                                      c = 2 ÷ (-2)

                                      [tex]\boxed{c = -1}[/tex]   -------------(I)

It is given that when f(x) divided by ( x - 2) it leaves a remainder (-3)

                         f(2) = -3

     8 + 4b + 2c + d  = -3

   8 + 4b + 2*(-1) + d = -3    {from (I)}

      8 + 4b - 2 + d    = -3

                    4b + d = -3 + 2 - 8

                     4b + d = -9 -------------(II)

It is given that when f(x) divided by ( x + 3) it leaves a remainder (-48).

                             f(-3) = -48

        -27 + 9b - 3c + d = -48

       -27 + 9b - 3*(-1) +d = -48      {From (I)}

           -27 + 9b + 3 + d  = - 48

                       9b + d     = -48 + 27 - 3

                         9b + d   = -24  --------------(III)

Subtract equation (III) from equation (II),

         (II)           4b + d = -9

        (III)            9b + d = -24

                      -        -       +    

                           -5b      = 15

                                 b    = 15 ÷ (-5)

                                [tex]\boxed{b=-3}[/tex]

Plugin b = -3 in equation (II),

             4*(-3) + d = -9

               -12   + d = -9

                          d = -9 + 12

                          [tex]\boxed{d = 3}[/tex]

                 [tex]\boxed{\bf f(x) = x^3 - 3x^2 -x + 3 }[/tex]

The sum of the deviations of the individual data elements from their mean is always equal to zero. Correct option is A.

This is because the deviation is defined as the difference between each data point and the mean of all the data points.

Since the mean is calculated as the sum of all the data points divided by the total number of data points, the positive deviations from the mean must be balanced out by the negative deviations from the mean. In other words, for every data point that is above the mean, there is a corresponding data point that is below the mean.

When we add up all the deviations from the mean, the positive deviations will cancel out the negative deviations, resulting in a sum of zero. This property of the sum of deviations from the mean is fundamental to many statistical concepts, such as variance and standard deviation.

Therefore, the correct answer to the question is (a) equal to zero, since the sum of the deviations from the mean is always zero.

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The simplified form of the polynomial expression in standard form is: - x² - 8x - 8

The standard form of a polynomial is usually expressed by writing the highest degree of terms first then the next degree and so on. The standard form of polynomial is given by, f(x) = aⁿxⁿ + aⁿ⁻¹xⁿ⁻¹ + aⁿ⁻²xⁿ⁻² + ... + a₁x + a₀, where x is the variable and a_i are coefficients.

The polynomial expression is given as (x+4)² is subtracted from 8. Thus, we have:

8 - (x+4)²

Expanding gives:

8 - (x² + 8x + 16)

= 8 - x² - 8x - 16

= - x² - 8x - 8

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The weight of an object varies directly with the mass of the object therefore, the mass of the other object that weighs 15 N is 3 kg.

We can use the formula for direct variation, which states that if y varies directly with x, then y = kx, where k is the constant of variation. In this case, the weight y varies directly with the mass x, so we have:

y = kx

We are given that when x = 5 kg, y = 25 N. Substituting these values into the formula, we get:

25 = k(5)

Solving for k, we have:

k = 5

Now we can use this value of k to find the mass of another object that weighs 15 N. Let's call the mass of this object x2. We know that y2, the weight of the object, is 15 N. So we have:

15 = 5x2

Solving for x2, we have:

x2 = 3 kg

Therefore, the mass of the other object that weighs 15 N is 3 kg.

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If the population growth rate is 3.5 percent every year then the population of the town after 7 years would be 14940.

Given that population grows 3.5 percent every year.

So, the increase in population after one year

= 3.5% of 12000

= (3.5/100) × 12000

= 420

Thus the increase in population after 7 year would be,

= population increase in one year × 7

= 420×7 = 2940

Hence population of the town after 7 years = (present population + increase in population)

= 12000 + 2940

= 14940

So the population of the town after 7 years with 3.5 % growth every year would be 14490.

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