Write an exponential function for a graph that passes through the points (2,9) and (3,27).

Write the function in the form
y = a(b).

2x² - 6у² is a difference of two squares since we can rewrite it as (x√2)² - (y√6)². Therefore, the answer is D.

A binomial expression is a polynomial with two terms. The terms can be added or subtracted from each other and may contain variables, coefficients, and exponents.

A common example of a binomial expression is (x+y). This binomial expression has two terms, x and y, which are added together. Another example is (2a - b), which has two terms, 2a and -b, which are subtracted from each other.

Binomial expressions are commonly used in algebra to express equations, formulas, and identities. They can be combined with other binomial expressions, constants, and variables to create more complex expressions. For example, (x+y)(x-y) is a binomial expression that represents the difference of two squares and can be simplified to x² - y².

Binomial expressions can also be raised to powers using the binomial theorem. This theorem provides a formula for expanding the power of a binomial expression, such as (x+y)^n or (a-b)^n, where n is a positive integer. The resulting expression will contain multiple terms, which can be simplified and rearranged using algebraic techniques.

The difference of two squares is a binomial expression in the form of a² - b², where a and b are terms. Using this definition, we can identify which of the given expressions is the difference of two squares:

A. 9g - 36h is not a difference of two squares since there are no squares involved.

B. 9a² - 4b⁶ is not a difference of two squares since both terms are squares, but they are not subtracted from each other.

C. 49m² + 81n² is not a difference of two squares since both terms are squares, but they are not subtracted from each other.

D. 2x² - 6у² is a difference of two squares since we can rewrite it as (x√2)² - (y√6)². Therefore, the answer is D.

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Answer: To find the length of the box using the partial quotient method, we divide the volume of the box by the product of its width and height:

Step 1: Divide the first digit of the dividend (5) by the divisor (7), and write the quotient (0) above the digit.

    0

  -----

7 |  5 0 4

Step 2: Multiply the divisor (7) by the quotient (0), and write the product (0) below the first digit of the dividend.

    0

  -----

7 |  5 0 4

      0

Step 3: Subtract the product (0) from the first digit of the dividend (5), and bring down the next digit (0) to the right of the difference.

    0

  -----

7 |  5 0 4

      0

    ---

      5 0

Step 4: Divide the first two digits of the new dividend (50) by the divisor (7), and write the quotient (7) above the second digit.

    0 7

  -----

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

Step 5: Multiply the divisor (7) by the quotient (7), and write the product (49) below the first two digits of the new dividend.

    0 7

  -----

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

      4 9

Step 6: Subtract the product (49) from the first two digits of the new dividend (50), and bring down the next digit (4) to the right of the difference.

    0 7

  -----

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

      4 9

    -----

        5 4

Step 7: Divide the first two digits of the new dividend (54) by the divisor (7), and write the quotient (7) above the second digit.

    0 7 7

  -------

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

      4 9

    -----

        5 4

Step 8: Multiply the divisor (7) by the quotient (7), and write the product (49) below the first two digits of the new dividend.

    0 7 7

  -------

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

      4 9

    -----

        5 4

      4 9

Step 9: Subtract the product (49) from the first two digits of the new dividend (54), and bring down the next digit (2) to the right of the difference.

    0 7 7

  -------

7 |  5 0 4

      0

    ---

      5 0

    - 4 9

    -----

        1 0

      4 9

    -----

        5 4

      4

Step-by-step explanation:

The amount of people infected after t weeks is modeled by the function presented as follows:

[tex]f(t) = \frac{675000}{1 + 4000e^{-t}}[/tex]

When the epidemic began, we have that t = 0, hence the number of people is given as follows:

f(0) = 675,000/(1 + 4000)

f(0) = 169 people.

Six weeks after the epidemic began, we have that t = 6, hence the number of people is given as follows:

f(6) = 675,000/(1 + 4000 x e^(-6))

f(6) = 61,841 people.

The limiting size of the infected population is the numerator of the fraction, which is 675,000, as the denominator goes to zero when t goes to infinity.

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As three dice are thrown together and the probability of any two of them being the same will be 5/12.

When a dice is thrown there are 6 possible outcomes. So, when three dice are thrown, the number of outcomes will be 6× 6× 6 = 216.

The probability of a number repeating = ₆C₂ = (6×5)/2 = 15

So each number will have possible 15 outcomes.

6 numbers will have 6 × 15 outcomes = 90 outcomes

So probability = Number of desired outcomes/ total number of outcomes  = 90 / 216 = 5/12

So the probability of any two number matches when three dices are thrown together will be 5/12.

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The median is the best measure of center because there are no outliers present.

In the given line plot, we have the following data points for the cost of used books in dollars:

1 at $2, 1 at $4, 3 at $3, 1 at $8, 2 at $6, 2 at $7, and 1 at $9.

To decide which measure of center is most appropriate, let's first understand the difference between the mean and the median.

Mean: The mean is the sum of all the data points divided by the number of data points. It is sensitive to outliers, which means that if there are extreme values in the data, the mean can be significantly affected.

Median: The median is the middle value of a dataset when the data points are arranged in ascending order. If there are an even number of data points, the median is the average of the two middle values. The median is less sensitive to outliers, making it a more robust measure of center when extreme values are present.

Now, let's examine the given data for any outliers. There doesn't seem to be any extreme values in the data; the costs are fairly close together. However, the data is slightly skewed to the right, which means there is a higher concentration of lower values.

In this case, the median would be a better measure of center because it is less sensitive to the skewed distribution.

To find the median, first, arrange the data in ascending order:

$2, $3, $3, $3, $4, $6, $6, $7, $7, $8, $9

There are 11 data points, so the middle value is the 6th data point:

Median = $6

Thus, the median is the most appropriate measure of center for this data, and the median cost of used books is $6.

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The length of v, to the nearest 10th of a centimeter is 2.2.

To find the length of side v in triangle UVW, we can use the law of sines, which states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all sides and angles in the triangle.

Using this formula, we have,

v/sin(m∠V) = w/sin(m∠W)

We know that w = 1.4 cm and m∠W = 63°. To find sin(m∠W), we can use a calculator,

sin(63°) ≈ 0.89

Substituting the values we know into the formula, we get,

v/sin(m∠V) = 1.4/0.89

To solve for v, we need to find sin(m∠V). We know that the sum of the angles in a triangle is 180°, so we can find m∠V by subtracting the measures of the other two angles from 180°,

m∠V = 180° - m∠U - m∠W

m∠V = 180° - 29° - 63°

m∠V = 88°

Now, we can substitute the value of sin(m∠V) into the equation and solve for v,

v/ sin(88°) = 1.4/0.89

v ≈ 2.2 cm

Therefore, the length of side v in triangle UVW is approximately 2.2 cm to the nearest tenth of a centimeter.

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Answer:

1.6

Step-by-step explanation: This is answer on DeltaMath

The probability that the pirate will encounter exactly 3 islands with treasure and none with traps while searching all 6 islands is approximately 0.240 or 24%.

Let's calculate the probability that the pirate will encounter exactly 3 islands with treasure and none with traps.

First, we need to consider the probabilities for each outcome on each island:

P(treasure) = 1/4

P(traps) = 1/12

P(neither treasure nor traps) = 2/3

Now, we want to find the probability of encountering 3 islands with treasure and none with traps out of 6 islands. This is a binomial probability problem, where n is the number of trials (6 islands) and k is the number of successful outcomes (3 islands with treasure). The probability of success (p) is the probability of finding treasure on an island (1/4), and the probability of failure (q) is the probability of not finding traps on an island (1 - 1/12 = 11/12).

The binomial probability formula is:

[tex]P(X = k) = \binom{n}{k} \cdot p^k \cdot q^{n-k}[/tex]

where:

[tex]\binom{n}{k} = \frac{n!}{k! \cdot (n-k)!}[/tex]

Plugging in the values:

n = 6 (number of islands)

k = 3 (number of islands with treasure)

p = 1/4 (probability of finding treasure on an island)

q = 11/12 (probability of not finding traps on an island)

[tex]P(X = 3) = \binom{6}{3} \cdot \left(\frac{1}{4}\right)^3 \cdot \left(\frac{11}{12}\right)^3[/tex]

Calculating (6 choose 3):

[tex]\binom{6}{3} = \frac{6!}{3! \cdot (6-3)!} = 20[/tex]

Now, plug in the values:

[tex]P(X = 3) = \binom{6}{3} \cdot \left(\frac{1}{4}\right)^3 \cdot \left(\frac{11}{12}\right)^3 \approx 0.240[/tex]

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The complete question:

A pirate is searching for buried treasure on 6 islands. on each island, there is a 1/4 chance that the island has buried treasure and no traps, a 1/12 chance that the island has traps but no treasure, and a 2/3 chance that the island has neither traps nor treasure. what is the probability that while searching all 6 islands, the pirate will encounter exactly 3 islands with treasure, and none with traps?

The circumference of the circle is approximately 54.1 yards.

Circumference is a term used to describe the distance around the edge of a circular object. It is a measurement of the total length of the circle's perimeter. The circumference of a circle is calculated by multiplying its diameter by the mathematical constant pi (π), which is approximately equal to 3.14.

The formula for calculating circumference is C=πd or C=2πr, where C represents the circumference, d represents the diameter, and r represents the radius of the circle. The diameter is the distance across the circle, passing through its center, while the radius is the distance from the center to the edge.

Circumference is a fundamental concept in geometry and is used to solve various real-world problems, such as calculating the distance traveled by a rotating wheel or finding the length of a wire needed to make a circular ring. Additionally, many physical phenomena, such as the movement of planets and the orbits of electrons, can be described using the concept of circumference.

The circumference of a circle with a radius of 8.6 yards can be found using the formula:

C = 2πr

where r is the radius and π is the mathematical constant approximately equal to 3.14.

Substituting the given value of the radius, we get:

C = 2 × 3.14 × 8.6

C = 54.088

Rounding this to the nearest tenth, we get:

C ≈ 54.1 yards

Therefore, the circumference of the circle is approximately 54.1 yards.

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Answer:  the solution for y in terms of x is y = (-1/4)x - 8.

Step-by-step explanation: In order to obtain a solution for y in the given equation of 4y = -x - 32, it is imperative to achieve the isolation of y on a singular side of the equation. To accomplish this task, it is possible to perform division on both sides of the equation by a factor of 4:

The given equation 4y/4 = (-x - 32)/4 can be expressed in an academic manner as follows: The given equation reveals that the quotient of 4y divided by 4 is equivalent to the quotient of the opposite of x added to negative 32, also divided by 4.

Upon performing simplification, the expression on the right-hand side yields:

The equation y = (-1/4)x - 8 can be expressed in an academic manner as follows: The dependent variable y is equivalent to the product of the constant (-1/4) and the independent variable x, with an additional decrement of eight.

The compound inequality ​20 < 90 + x < 30 when solved has a solution of -70 < x < -60.

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

20 < 90 + x < 30

Subtracting 90 from all parts of the inequality, we get:

-70 < x < -60

Therefore, the solution to the compound inequality is: -70 < x < -60.

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Kaylee will have to pay $28 in interest.

The interest on a loan or principal sum can be easily calculated using simple interest. Simple interest is a notion that is employed across a wide range of industries, including banking, finance, automobiles, and more.

The interest Kaylee will have to pay is calculated as follows:

Interest = Principal x Rate x Time

where Principal is the amount borrowed, Rate is the interest rate as a decimal, and Time is the time period in years. Since Kaylee has to pay back the loan in 24 months, or 2 years, we can plug in the given values to get:

Interest = 700 x 0.02 x 2 = $28

Therefore, Kaylee will have to pay $28 in interest.

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Answer:

15π

Step-by-step explanation:

If it is in terms of pi, then it would be 15π.

If you want the full circumference, it would be 47.1.

Explanation:

15/2 = 7.5.

7.5*2 = 15.

15π = 47.1.

Hope this helped!

Answer:

1767.1

Step-by-step explanation:

circle = 4/3 x pie x r^3

Divid 15 by 2 to get radius

15/2=7.5

7.5^3 = 421.875

421.875 x pie = 1325.359401

1325.359401 x 4/3 = 1767.145868

1767.145868 Estimated = 1767.1

Answer:

To find the density of the brick, we need to divide its mass by its volume:

density = mass / volume

Plugging in the values given in the problem, we get:

density = 2,022.75 g / 1,064.5 cm³

Simplifying the division, we get:

density = 1.8996 g/cm³

Rounding to the nearest tenth, we get:

density ≈ 1.9 g/cm³

Therefore, the density of the brick is approximately 1.9 grams per cubic centimeter (g/cm³).

The impact propensity can be interpreted as the slope coefficient for the tax personal exemption (pe) or its first lag in

the regression equation.

To determine the impact propensity in the regression of the general fertility rate (GFR) on the tax personal exemption

(PE) and its first lag, you should follow these steps:

Estimate the regression model using the available data. The model should look like this:

GFR = β0 + β1 × PE + β2 × PE_lag + ε

Where GFR is the general fertility rate, PE is the tax personal exemption, PE_lag is the tax personal exemption's first

lag, and ε is the error term.

Obtain the estimated coefficients (β0, β1, and β2) from the fitted regression model.

These coefficients will help you determine the impact propensity.

Calculate the impact propensity. The impact propensity in this context refers to the change in the general fertility rate

resulting from a one-unit increase in the tax personal exemption, taking into account both its current and lagged

effects.

To find the impact propensity, sum the coefficients for the tax personal exemption and its first lag:

Impact propensity = β1 + β2

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16.) Mean average deviation= option C

17.) Range of a data set = option E.

18.) First quartile = opinion AB

19.) Second quartile = option B

20.) Third quartile = option A

21.) Interquartile range = option D

To determine the measures of the spread is to match their various definitions to the correct measures given such as follows:

16.) Mean average deviation: The average deviation of data from the mean.

17.) Range of a data set : The difference between the highest value and the lowest value in a numerical data set.

18.) First quartile: The median in the lower half.

19.) Second quartile: The median value in a data set.

20.) Third quartile: The median in the upper half.

21.) Interquartile range: The distance between the first and the third quartile.

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The equation of g(x) in parabola vertex form is g(x) = (x + 4)^2 + 3. Option (D) is the correct answer.

Since the vertex of the parabola is at (-4, 3), we can write the equation of the parabola in vertex form as:

g(x) = a(x + 4)^2 + 3

where "a" is a constant that determines the shape of the parabola. Since the parabola opens upward, "a" must be positive.

We also know that the parabola passes through the points (-6, 7) and (-2, 7). Substituting these values into the equation above, we get:

7 = a(-6 + 4)^2 + 3

7 = 4a + 3

4a = 4

a = 1

Substituting "a = 1" into the equation above, we get:

g(x) = (x + 4)^2 + 3

Therefore, the equation of g(x) in vertex form is g(x) = (x + 4)^2 + 3. Option (D) is the correct answer.

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The length of the diagonals in ascending order is: 140/3 inches

Algebra is a branch of mathematics that deals with mathematical operations and symbols to represent numbers and their relationships. It involves the use of variables, which are letters or symbols that represent unknown or unspecified quantities, and manipulating equations and expressions to solve problems.

To compare the lengths of the diagonals of the three TV screens, we can simplify each expression and put them in order:

5 square roots of 84 inches

= 5 * √(4 * 21) inches

= 10 * √(21) inches

46 2/3 inches

= 140/3 inches

46.625 inches

Therefore, the length of the diagonals in ascending order is:

46.625 inches < 140/3 inches < 10 * √(21) inches

Note that we can also write the second diagonal as a mixed number, which is the form of a whole number and a fraction:

140/3 inches

= 46 2/3 inches

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The equation to model the cost of making different numbers of shirts is c = 7.50t - 750.

Y = mx + b, where x is the independent variable, m is the slope, and b is the y-intercept, is the slope-intercept form of a linear equation. The dependent variable's rate of change with respect to the independent variable is represented by the slope (m), and its value when the independent variable is zero is shown by the y-intercept (b).

This equation's form is helpful for charting linear functions since the slope and y-intercept provide information about the direction and steepness of the line as well as its point of intersection with the y-axis.

The linear equation is given by the formula:

y = mx + b

Here. m is the slope.

The value of m is given as:

m = (y2 - y1) / (x2 - x1)

Substituting the points 100, 600) and (250, 1387.50) from the table:

m = (1387.50 - 600) / (250 - 100)

m = 7.50

Now, for the y-intercept b we have:

b = y - mx

Substituting the data point:

b = 600 - 7.50(100)

b = -750

Now the equation of the model is:

c = 7.50t - 750

Hence, the equation to model the cost of making different numbers of shirts is c = 7.50t - 750.

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the equivalent form of the trinomial x² - 11x + 18 is (x - 2)(x - 9). We can verify this by multiplying the two binomials using the distributive property:

How to solve the question?

The given trinomial is x² - 11x + 18. To find an equivalent form, we can factorize the trinomial by finding two binomials whose product is equal to the trinomial.

We can start by finding two factors of 18 that add up to -11, the coefficient of x. The factors of 18 are 1, 2, 3, 6, 9, and 18. We can see that 9 and 2 are the two factors that add up to -11. So, we can write:

x² - 11x + 18 = (x - 2)(x - 9)

Therefore, the equivalent form of the trinomial x² - 11x + 18 is (x - 2)(x - 9). We can verify this by multiplying the two binomials using the distributive property:

(x - 2)(x - 9) = x(x - 9) - 2(x - 9) = x² - 9x - 2x + 18 = x² - 11x + 18

So, we have successfully found the equivalent form of the given trinomial.

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Answer:

Step-by-step explanation:

Medium is 28

Mean is 29

Range is 11

Midrange is 29.5

Therefore, y is equal to 12 2/5 and n is equal to 2 2/5 in the equation.

An equation is a mathematical statement that shows that two expressions are equal. An equation is typically written with an equal sign (=) between two expressions. Equations can involve various mathematical operations, such as addition, subtraction, multiplication, division, exponents, and logarithms. Solving an equation typically involves performing mathematical operations on both sides of the equation to isolate the variable (the unknown value) and find its value.

Here,

To solve for y in the equation 2y + 8 1/5 = 33, we can follow these steps:

Subtract 8 1/5 from both sides of the equation:

2y = 33 - 8 1/5

2y = 24 4/5

Divide both sides of the equation by 2:

y = (24 4/5) / 2

y = 12 2/5

Therefore, y is equal to 12 2/5.

To solve for n in the equation 2n + 4 1/5 = 9, we can follow these steps:

Subtract 4 1/5 from both sides of the equation:

2n = 9 - 4 1/5

2n = 4 4/5

Divide both sides of the equation by 2:

n = (4 4/5) / 2

n = 2 2/5

Therefore, n is equal to 2 2/5.

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The x - intercepts, when entered as ordered pairs, would be (2, 0) and (-4, 0).

The y - intercepts would be (0, -8).

The equation for the line of symmetry for the graph of f(x) would be x = -1.

The vertex of the graph of f(x) would be (-1, -9).

To find the x-intercepts, we need to set f(x) = 0 and solve for x:

x = (-2 ± √(2² - 4 x 1 x (-8))) / (2 x 1)

x = (-2 ± √(4 + 32)) / 2

x = (-2 ± √36) / 2

x = (-2 ± 6) / 2

There are two solutions:

x1 = (-2 + 6) / 2 = 4 / 2 = 2

x2 = (-2 - 6) / 2 = -8 / 2 = -4

So the x-intercepts are (2, 0) and (-4, 0).

To find the y-intercept, we need to set x = 0 and solve for f(0):

f(0) = 0² + 2 x 0 - 8 = -8

So the y-intercept is (0, -8).

To find the line of symmetry, we can use the formula:

x = -b / 2a

x = -2 / (2 x 1) = -1

So the equation of the line of symmetry is x = -1.

To find the vertex, we need to substitute the x-coordinate of the line of symmetry into the function:

f(-1) = (-1)² + 2 * (-1) - 8 = 1 - 2 - 8 = -9

So the vertex is at the point (-1, -9).

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All four zeros are real solutions in the polynomial equation.

What are polynomials in equations?

A polynomial is an expression that consists of one or more variables, coefficients, and non-negative integer exponents of the variables. An equation is a mathematical statement with an equal sign between two algebraic expressions with equal values. 

x⁴ – 41 x² = – 400

Adding 400 on both sides to get rid 400 from right side and set 0 on right side, we get

       x⁴ - 41x² + 400 = -400 + 400

     x⁴ - 41x² + 400 = 0

Factoring by product sum rule.

We need product of 400 and sum upto -41.

We can see that 400 = -25 × -16 = 400 and -25-16 = -41.

Therefore,

         x⁴ - 25x² - 16x²  + 400 = 0

Making it into two groups, we get

  (x⁴ - 25x²) + (-16x² + 400) = 0

Factoring out GCF of each group, we get

  x²(x² - 25) (x² - 16) = 0

(x² - 25) = x² - 5²  = (x - 5) (x + 5)

x² - 16 = x² - 4² = (x - 4)(x + 4)

(x - 5) (x + 5) (x - 4)(x + 4) = 0

Applying zero product rule,

x-5=0

x+5=0

x-4=0 and

x+4=0.

Therefore,

x = -5, -4, 4 and 5.

All four zeros are real solutions.

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Answer:

(0, 0)

(4, 16)

Step-by-step explanation:

[tex]y = 4x[/tex]

[tex]y = x^2[/tex]

Using substitution, we can replace y in the second equation with 4x from the first equation.

[tex]4x = x^2[/tex]

Now, we can move all the x's to one side and complete the square to solve for x.

[tex]0 = x^2 - 4x[/tex]

↓ adding 4 to both sides

[tex]4 = x^2 - 4x + 4[/tex]

↓ factoring the right side

[tex]4 = (x-2)^2[/tex]

↓ taking the square root of both sides

[tex]\sqrt4 = \sqrt{(x-2)^2[/tex]

[tex]\pm2 = x - 2[/tex]

↓ adding 2 to both sides

[tex]2 \pm 2 = x[/tex]

[tex]\boxed{x = 0 \ \ \ \text{or} \ \ \ x = 4}[/tex]

Then, we can solve for y by plugging both x-values into the first equation.

[tex]y = 4(0)[/tex]     or     [tex]y = 4(4)[/tex]

[tex]\boxed{y = 0 \ \ \ \text{or} \ \ \ y=16}[/tex]

Finally, we can form two ordered pairs that are the solutions to the system of equations.

[tex]\boxed{(0,0)}[/tex]

[tex]\boxed{(4,16)}[/tex]

The values of x and y of a curved ladder in feet given by the equation y=-1/20x^2+x are as follows in tabular form,

Values of x (in feet)                               Values of y (in feet)

0                                                               0

5                                                               3.75

10                                                              5

15                                                              3.75

20                                                             0

A curved ladder that children can climb on is modeled by the system of equations as,

y=-(1/20)x^2+x

where, x and y are measured in feet.

Putting x= 0 in the above equation y=-(1/20)x^2+x , we get,

y = - (1/20) (0^2) + (0) = 0

Putting x= 5 in the above equation y=-(1/20)x^2+x , we get,

y= - (1/20)(5^2)+(5) =  -5/4 + 5 = 15/4 = 3.75

Putting x= 10 in the above equation y=-(1/20)x^2+x , we get,

y= - (1/20)(10^2)+(10) =-5 +10 = 5

Putting x= 15 in the above equation y=-(1/20)x^2+x , we get,

y= - (1/20)(15^2)+(15)  = -45/4 +15= 3.75

Putting x= 20 in the above equation y=-(1/20)x^2+x , we get,

y= - (1/20)(20^2)+(20)  = -20 +20 = 0

Hence, when x= 0 feet, y = 0 feet ; x= 5 feet, y = 3.75 feet ; x = 10 feet, y = 5 feet ; x =15 feet , y =03.75 feet ;and x = 20feet, y = 0 feet from the solving the given equation.

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The number of square feet of glass used for your windows is $129.09.

Glass is an amorphous, transparent material that is hard, brittle, and corrosion-resistant. It is composed of silica, soda ash, and other materials that when heated and cooled form a non-crystalline material. Glass is a non-conductor of electricity and heat, and is also highly resistant to chemicals. It is often used in windows and other applications where transparency is desired. Additionally, glass can be used in a variety of decorative and functional applications such as mirrors, tableware, kitchenware, and art.

$200 + 33x = 4490$
Subtract $200$ from both sides:
$33x = 4290$
Divide both sides by $33:
$x = 129.09
Therefore, the number of square feet of glass used for your windows is $129.09.

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Therefore, the difference in mass between Earth and Venus is approximately 5.96513 x 10^24 kilograms.

The difference in mass between Earth and Venus is:

5.97 x 10^24 kg - 4.87 x 10^12 kg

To subtract these two values, we need to express them in the same scientific notation. Since 4.87 x 10^12 is much smaller than 5.97 x 10^24, we can express it in scientific notation with the same exponent as the mass of Earth:

4.87 x 10^12 kg = 0.00487 x 10^24 kg

Now we can subtract the two values:

5.97 x 10^24 kg - 0.00487 x 10^24 kg = 5.96513 x 10^24 kg

Therefore, the difference in mass between Earth and Venus is approximately 5.96513 x 10^24 kilograms.

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The answer is: There were about 169 principals in attendance.

what is proportion?

In mathematics, a proportion is an equation that states that two ratios or fractions are equal. A proportion can be written in the form of a/b = c/d, where a, b, c, and d are numbers or variables.

Proportions are used to compare two or more quantities or to find an unknown value. For example, if we know that the ratio of the length of a rectangle to its width is 2:1, and we also know that the length is 6 feet, we can use a proportion to find the width. We set up the proportion as 2/1 = 6/w, where w is the width of the rectangle, and then solve for w by cross-multiplying and simplifying the equation.

Proportions are also used in many real-world applications, such as cooking, finance, and science.

To make a prediction about the number of principals in attendance at the conference, we need to use the given information and make some assumptions.

We know that in one exhibit room of 80 people, there were 15 principals. Let's assume that this exhibit room is representative of the entire conference, and that the proportion of principals to attendees in this room is the same as the proportion of principals to attendees in the entire conference.

Using this assumption, we can set up a proportion:

15 principals / 80 attendees = x principals / 900 attendees

To solve for x, we can cross-multiply and simplify:

15 * 900 = 80 * x

x = (15 * 900) / 80 = 168.75

So our prediction is that there were about 169 principals in attendance at the conference.

Therefore, the answer is: There were about 169 principals in attendance.

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Answer:

 the first one: 5x3y2 - 2xy4 +xy

Step-by-step explanation:

hope it helps :)