what is the value of the expression 9 (5) - X / Y when x= 15 and y= 3
a 5
b 10
c 15
d 20

The probability that the second person chosen will also be a boy is roughly 0.872, or 87.2%.

Since the first person chosen is a boy, there are now 12 boys and 15 girls left in the class. We want to find the probability that the second person chosen is also a boy.

The probability of choosing a boy for the first selection is 13/28. Then, for the second selection, there are now 12 boys and 27 students left, so the probability of choosing a boy is 12/27.

Using conditional probability, we can calculate the probability that the second person chosen is also a boy given that the first person chosen is a boy:

P(Second person is a boy | First person is a boy) = P(Both are boys) / P(First person is a boy)

P(Second person is a boy | First person is a boy) = (12/27) / (13/28)

P(Second person is a boy | First person is a boy) ≈ 0.872

Therefore, the probability that the second person chosen is also a boy given that the first person chosen is a boy is approximately 0.872 or 87.2%.

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Answer:

The perimeter of the portrait is $2\times(1+2)=6$ yards.

To find the cost of the frame, we need to calculate the length of the frame needed, which is the same as the perimeter of the portrait. So, the length of the frame needed is 6 yards.

The cost of the frame will be the cost per yard multiplied by the length of the frame:

$6~\text{yards} \times $10.17/\text{yard} = $61.02$

Therefore, the frame will cost $61.02.

Answer:

e = - 10

Step-by-step explanation:

4e - 6e - 5 = 15

- 2e - 5 = 15 ( add 5 to both sides )

- 2e = 20 ( divide both sides by - 2 )

e = - 10

Answer: e = -10

Step-by-step explanation:

4e-6e-5=15

-2e-5=15

add 5 on both sides

-2e=20

divide 20 on both sides

e=-10

The break-even point is 120 tickets, which is option A.

It is the income generated by a business, which includes all the money received from customers for the products or services sold, as well as any other sources of income. Revenue is calculated by multiplying the price of a product or service by the number of units sold. It is an important financial metric that helps businesses determine their profitability and growth potential.

Let's assume that x number of students are attending the party.

The cost for food per person is $15 and the revenue generated per person is $20, so the profit per person is $20 - $15 = $5.

The total cost of the party is $600 + $15x.

We need to find the number of tickets sold to cover the cost of the party, which is the break-even point.

So, we set the revenue generated equal to the cost of the party:

20x = 600 + 15x

5x = 600

x = 120

Therefore, the break-even point is 120 tickets, which is option A.

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After answering the presented question, we can conclude that The point of intersection of these two equations is (2, 0), which is the spot on the graph where the parabola and line intersect.

An equation is a mathematical statement that validates the equivalent of two expressions linked by the equal symbol '='. For example, 2x - 5 = 13. 2x-5 and 13 are two phrases. The character '=' is used to connect the two expressions. An equation is a mathematical formula that has two algebras on either side of an assignment operator (=). It illustrates the equivalency relationship between the left and middle formulas. In any formula, L.H.S. = R.H.S. (left side = right side).

The graph represents the following equation system:

[tex]y = x^2 + 3x + 2 x + y = 2[/tex]

This is due to the fact that the graph of a quadratic function intersecting a linear function at point (2, 0) is represented by a parabola and a straight line intersecting at that point (2, 0).

The equation [tex]y = x^2 + 3x + 2[/tex] represents an upward-opening parabola that goes through the point (-2, 0).

The equation x + y = 2 denotes a straight line that connects the locations (0, 2) and (2, 0).

The point of intersection of these two equations is (2, 0), which is the spot on the graph where the parabola and line intersect.

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using graph f(x) is concave down on (-1,0), (1,∞).

What is derivative?

A function's varied rate of change with respect to an independent variable is referred to as a derivative. When there is a variable quantity and the rate of change is irregular, the derivative is most frequently utilized. The derivative is used to assess how sensitive a dependent variable is to an independent variable (independent variable). In mathematics, a quantity's instantaneous rate of change with respect to another is referred to as its derivative. Investigating the fluctuating nature of an amount is beneficial.

f(x) is concave up where f'(x) is increasing and concave down where f'(x) is decreasing

So, using graph f(x) is concave down on (-1,0), (1,∞).

Hence, using graph f(x) is concave down on (-1,0), (1,∞).

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The estimated life expectancy for someone born in 2005 is approximately 85.09 years.

Life expectancy is the average number of years that a person is expected to live, based on statistical data and various demographic factors such as age, gender, health status, lifestyle, and environmental conditions. It is usually calculated from birth and is a useful indicator of the overall health and well-being of a population.

Life expectancy can vary widely between different countries and regions, as well as between different demographic groups within a population. Factors that can influence life expectancy include access to healthcare, nutrition, education, economic development, social support, and public health policies.

To estimate the life expectancy for someone born in 2005, we need to use the line of best fit equation:

y = 0.40x - 716.91

where x is the birth year and y is the corresponding life expectancy.

To find the estimated life expectancy for someone born in 2005, we substitute x = 2005 into the equation:

y = 0.40(2005) - 716.91

y = 802 - 716.91

y = 85.09

Therefore, the estimated life expectancy for someone born in 2005 is approximately 85.09 years.

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A. Differently organized; B. Different rates; C. Inconvenient access; D. Limited membership.

To calculate the interest rate on a loan, you will need to figure out the amount of interest you will need to pay over the life of the loan. First, you will need to determine the loan amount, the interest rate, and the loan term. Then, you will need to calculate the total interest by multiplying the loan amount by the interest rate and the loan term. Finally, you will need to divide the total interest by the loan amount and then multiply that by 100 to get the annual percentage rate (APR). This will give you the interest rate you will need to pay over the life of the loan.

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The missing measurements of the triangle given include:

The value of angle B can be found thanks to the knowledge that the interior angles of a triangle add up to 180 degrees and we have two of the angle measurements :

= 180 - angles measurements

= 180 - 27 - 90

= 63 degrees

The value of AB can be found by using the Sin theta operation such that:

Sin theta = Opposite / hypotenuse

Sin ( 27 degrees ) = 12 / hypotenuse which is AB

hypotenuse = 12 / ( Sin ( 27 degrees ))

= 26 .4 units

The value of AC measurement is:

Tan ( 27 degrees ) = 12 / AC

AC = 12 / Tan ( 27 degrees )

AC = 23. 6 units

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the distance from point C to line AB, you must find the length of the segment from C perpendicular to AB

A line segment in geometry has two different points on it that define its boundaries. A line segment is sometimes referred to as a section of a line that links two places. The difference between a line and a line segment is that a line has no endpoints and can go on forever in either direction. A ray has only one endpoint and an endlessly long another end, as opposed to a line segment that has two ends.

When the angle of inclination between two line segments is exactly equal, those two segments are said to be perpendicular.

The plus symbol is formed when two perpendicular line segments cross one other.

To find the distance from point C to line AB, you must find the length of the segment from C_______ to AB

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We can be 95% confident that the true mean concentration of THMs in your drinking water lies within the range [2.9584 ppb, 3.0416 ppb]. This was calculated using a confidence interval formula for the mean.

The confidence interval for the mean concentration of THMs can be calculated using the formula x ± z * (s/√n), where x is the sample mean, z is the z-score for a given confidence level, s is the sample standard deviation and n is the sample size.

In this case, we have x = 3 ppb, s = 0.3 ppb, and n = 200. To calculate the confidence interval at a certain confidence level (e.g. 95%), we need to find the corresponding z-score. For a 95% confidence level, the z-score is approximately 1.96.

Substituting these values into the formula above gives us:

3 ± 1.96 * (0.3/√200) = [2.9584, 3.0416]

So we can be 95% confident that the true mean concentration of THMs in your drinking water lies within the range [2.9584 ppb, 3.0416 ppb].

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Answer: We know that the area of the base of a cylinder is given by the formula:

A = πr²

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

To find the perimeter of the base, we need to know the circumference of the circle that forms the base of the cylinder. The formula for the circumference is:

C = 2πr

where C is the circumference and r is the radius.

To find the radius of the base, we can rearrange the formula for the area:

A = πr²

r² = A/π

r = √(A/π)

Substituting the given value for the area of the base, we get:

r = √(38.5/π) ≈ 3.5 m

Now, we can use the formula for the circumference to find the perimeter of the base:

C = 2πr = 2π(3.5) ≈ 22 m

Therefore, the perimeter of the base is approximately 22 meters.

Step-by-step explanation:

The expression 1÷2+2 3÷4-3÷8​ when simplified is 9/4

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

1÷2+2 3÷4-3÷8​

Express the terms properly as fractions

So, we have the following

1/2 + 2 3/4 - 3/8

Express each term as proper/improper fraction

So, we have the following representation

1/2 + 11/4 - 3/8

Express the denominator as the same

So, we have

4/8 + 22/8 - 3/8

Evaluate the like terms

18/8

So, we have

9/4

Hence, the solution is 9/4

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Answer:x=5/4

Step-by-step explanation:

you can take numbers with same variable(i mean x or y or other) in the same side:

2+3x=12-5x

2-12=-5x-3x

-10=-8x

x=10/8=5/4

Answer:

x = 5/ 4

Step-by-step explanation:

2 + 3x =12- 5x

3x + 5x = 12 - 2

8x = 10

x = 10/8

x = 5/4

The statement "rotated an angle whose measure is more than halfway around a circle" is incorrect. An angle whose measure is 60 degree is rotated more than halfway around a circle.

A rotated angle is an angle that has been moved or transformed from its original position, while an angle that measures more than halfway around a circle is called a reflex angle. A reflex angle measures between 180 and 360 degrees, which means that it has rotated more than halfway around a circle.

In contrast, an angle that measures less than 180 degrees is called an acute angle, while an angle that measures exactly 180 degrees is called a straight angle. Understanding the different types of angles is important in geometry and mathematics.

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The derivative for each of the definite integrals using the fundamental theorem of calculus is

a) d/dx ∫ 4x(2(6cos(t)+7)⁴)dt is 4(2(6cos(b)+7)⁴) - 4(2(6cos(a)+7)⁴)

b)  d/dx ∫ x³(4sin(t³−3))dt is 12(b²sin(b³-3) - a²sin(a³-3))

The fundamental theorem of calculus tells us that the derivative of the definite integral of a function f(x) with respect to x is equal to the function evaluated at the upper limit of integration minus the function evaluated at the lower limit of integration. In other words, if we have an integral of the form ∫f(x)dx evaluated from a to b, then

d/dx ∫f(x)dx = f(b) - f(a)

Let's apply this to the first integral, A).

A) d/dx ∫ 4x(2(6cos(t)+7)⁴)dt

We begin by recognizing that the function inside the integral is a function of t, not x. However, we want to take the derivative with respect to x. This means that we need to use the chain rule to differentiate the integrand with respect to x.

Using the chain rule, we have

d/dx [4x(2(6cos(t)+7)⁴)] = 4(2(6cos(t)+7)⁴)(d/dx [4x])

= 4(2(6cos(t)+7)⁴)(4)

= 32(2(6cos(t)+7)⁴)

Now, we can apply the fundamental theorem of calculus. Let's say we are evaluating the integral from a to b. Then,

d/dx ∫ 4x(2(6cos(t)+7)⁴)dt = [4b(2(6cos(t)+7)⁴)] - [4a(2(6cos(t)+7)⁴)]

= 4(2(6cos(b)+7)⁴) - 4(2(6cos(a)+7)⁴)

This is the final answer for A).

Now, let's move on to integral B).

B) d/dx ∫ x³(4sin(t³−3))dt

Again, we need to use the chain rule to differentiate the integrand with respect to x.

d/dx [x³(4sin(t³−3))] = (d/dx [x³])(4sin(t³−3))

= 3x²(4sin(t³−3))

Now, we apply the fundamental theorem of calculus. Let's say we are evaluating the integral from a to b. Then,

d/dx ∫ x³(4sin(t³−3))dt = [3b²(4sin(t³−3))] - [3a²(4sin(t³−3))]

= 12(b²sin(b³-3) - a²sin(a³-3))

This is the final answer for B).

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(15) The value of x is -588 (option A).

(16) The value of x makes the expression equal to 0 is -2i. (option B).

The value of x is calculated by solving the equation as follows;

(15) We have the equation:

√x = 14i√3

Squaring both sides, we get:

x = (14i√3)^2

x = -588

(16) Factoring the expression, we get:

x(x⁴ + 6x² + 8)

Setting each factor equal to 0, we get:

x = 0 or x⁴ + 6x² + 8 = 0

Let's solve for the second equation:

Let y = x²

Then we have:

y² + 6y + 8 = 0

Factorizing, we get:

(y + 2)(y + 4) = 0

So y = -2 or y = -4

Since y = x², this means:

x² = -2 or x² = -4

Taking the square root of both sides, we get:

x = ±√(-2) or x = ±√(-4)

Simplifying using imaginary numbers, we get:

x = ±i√(2) or x = ±2i

Thus, for the expression √x is equivalent to 14i√3,  the value of x is -588. And for the expression x⁵ + 6x³ + 8x, x = -2i.

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98 Degrees and 82 degrees  are  the measurements of the numbered angles of this circle.

What is a circle?

With no sides or edges, a circle is a figure with a round shape. A circle can be characterized in geometry as a closed shape, a two-dimensional shape, or a curved shape.

                           The collection of all points in the plane that make up a circle are all equally spaced from a certain point known as the "centre," making the form a closed two-dimensional shape. The symmetry line of reflection is formed by each line that traverses the circle. Moreover, it possesses rotational symmetry around the center for each angle.

Measure of angle 1 = (33 + 131)/2

                         = 82 degrees

Measure of angle 2 = 180 - 82

                         = 98 Degrees

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Answer:

429

Step-by-step explanation:

Answer:10ft

Step-by-step explanation:

we must use pythagorean theorem

[tex]which \ is \ a^{2} +b^{2} =c^{2} \\6^{2} + 8^{2} =36+64=100=10^{2}\\c=10--- > hypotenuse[/tex]

The measurements in order of size, starting with the smallest are: 2.3 mm, 24 mm, 2.3 cm, 21 cm, and  0.2 m.

Given the measurements in the question;

2.3 cm, 24 mm, 0.2 m, 21 cm, 2.3 mm​

To arrange the measurements in order of size, we need to convert them to a common unit of measurement.

We can convert all the measurements to meters, as it is the largest unit given.

Hence;

2.3 mm = 2.3 ÷ 1000 =  0.0023 m

24 mm = 24 ÷ 1000 = 0.024 m

21 cm = 21 ÷ 100 = 0.21 m

2.3 cm = 2.3 ÷ 100 =  0.023 m

0.2 m = 0.2 m

Now that all the measurements are in meters, we can compare them:

0.0023 m < 0.024 m < 0.023 m < 0.21 m < 0.2 m

Therefore, the measurements in order of size, starting with the smallest, are:

2.3 mm < 24 mm < 2.3 cm < 21 cm < 0.2 m

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Answer:0.27 miles

Step-by-step explanation:

Answer:

The answer to your question is 7040

Step-by-step explanation:

How many yards are in 1 mile:

So 1 mile = 1760 yards

Speed = 1760 yard per minute

= 1760 yd/min

Since we have 4 miles, we are gonna multiply 4 multiplied by 1760.

So 4 miles x 1760 = 7040

I hope this helps and have a wonderful day!

Answer:

-5 is your answer

Step-by-step explanation:

What do you mean leading coefficient of the following polynomial.

Look at the x^n and see who has the biggest values.

-5x^7 is the leading coefficient.

Answer:

Step-by-step explanation:

angle

Answer:

-3

Step-by-step explanation:

There is no significant evidence that more than two-thirds (67%) of authors support continuing this system.

This hypothesis is either rejected or accepted, depending on whether the population or sample under investigation is viable.

In other words, the null hypothesis is an assertion that the sample observations are the result of chance. It is asserted that surveyors who are interested in the data have made this allegation. It has the prefix H0.

Let p be the proportion of authors who support continuing the system.

Then hypotheses are:

H0: p=0.67

Ha: p>0.67

For calculating the test statistic:

z = p(s)-p/√ [p0(1-p)/N]

where, p(s) = 72/104 ≈ 0.692, p is 0.67 and N is the sample size =104

Then Z ≈ 0.477

The test statistic's p-value is 0.317.

Since 0.317>0.05 and we're assuming a significance level of 0.05, we are unable to reject the null hypothesis.

p-value 0.317 is the likelihood that the sample is chosen from the distribution assumed under null hypothesis, that is where the fraction of authors favouring the new publication scheme is at most 0.67.

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Answer:

a. from A to B, a rotation by 90 degrees anti-clockwise about (0,0).

b. from B to C, a translation by vector (-3/4, -1/4).

c. from A to C, a rotation by 60 degrees, anti-clockwise about (0,0).

Hope this helps, I'm sorry if it doesn't. If you need more help, ask me! :]

Answer:

The two teachers are approximately 4.1 meters apart.

Step-by-step explanation:

Let's use the following variables:

d = distance between the two teachers

Using the Pythagorean theorem:

d^2 = 4^2 + 1^2

d^2 = 16 + 1

d^2 = 17

d = sqrt(17)

d ≈ 4.1

Answer: 4.1

Step-by-step explanation:

[tex]\sqrt{1^2+4^2}[/tex]

evaluate the equation / expression

4.12311

round

4.12311 to the required place

4.1

Answer: To find the rational roots of f(d) = 5d^3 - 6d^2 + d - 8, we can use the Rational Root Theorem, which states that any rational root of a polynomial equation must be of the form p/q, where p is a factor of the constant term (in this case, -8) and q is a factor of the leading coefficient (in this case, 5).

The factors of -8 are ±1, ±2, ±4, and ±8, and the factors of 5 are ±1 and ±5. Therefore, the possible rational roots of f(d) are:

±1/1, ±2/1, ±4/1, ±8/1, ±1/5, ±2/5, ±4/5, and ±8/5

We can try these values one by one to see if they are roots of f(d). For example, when we try d = 1, we get:

f(1) = 5(1)^3 - 6(1)^2 + 1 - 8 = 5 - 6 + 1 - 8 = -8

Since f(1) is not equal to zero, d = 1 is not a root of f(d). We can continue this process until we find all the rational roots of f(d).

Step-by-step explanation: