Math is not my thing help

Math Is Not My Thing Help

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Answer 1

Answer:

mine either hahahahahaha


Related Questions

A quadrilateral is called cyclic if its vertices lie on a circle. Show that opposite interior angles of a quadrilateral are supplementary if and only if the quadrilateral is cyclic. [Hint: Use the preceding problem and facts about circumcircles of triangles]

Answers

Opposite interior bof a quadrilateral are supplementary if and only if the quadrilateral is cyclic.

A quadrilateral is called cyclic if its vertices lie on a circle. This means that there is a circumcircle that passes through all four vertices of the quadrilateral. If opposite interior angles of a quadrilateral are supplementary, then the sum of these angles is 180 degrees. This means that the opposite angles of a cyclic quadrilateral are supplementary.

To prove this, let us consider a quadrilateral ABCD that is cyclic. Let O be the center of the circumcircle that passes through all four vertices of the quadrilateral.

Since the quadrilateral is cyclic, angle AOB and angle COD are both subtended by the same arc, and therefore they are equal. Similarly, angle BOC and angle DOA are both subtended by the same arc, and therefore they are equal.

Now, let us consider the sum of the opposite interior angles of the quadrilateral.

Angle A + angle C = angle AOB + angle BOC + angle COD + angle DOA = 2(angle AOB) + 2(angle BOC) = 2(180) = 360

Since the sum of the opposite interior angles of the quadrilateral is 360 degrees, this means that the opposite interior angles of the quadrilateral are supplementary.

Therefore, opposite interior angles of a quadrilateral are supplementary if and only if the quadrilateral is cyclic.

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Question 3(Multiple Choice Worth 2 points)
(Volume of Cylinders MC)

What is the volume of a right circular cylinder with a diameter of 6 meters and a height of 14 meters. Leave the answer in terms of π.

504π m3
396π m3
126π m3
84π m3

Answers

The volume of the cylinder is 126π cubic meters.

What is Volume?

Volume is the measure of the space occupied by a three-dimensional object. It is typically expressed in cubic units.

The radius of the cylinder is half of the diameter, so the radius is 3 meters. The formula for the volume of a cylinder is

V = πr²h,

where r is the radius and h is the height. Substituting the given values, we get V = π(3)²(14) = 126π cubic meters.

Therefore, the volume of the cylinder is 126π cubic meters.

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Jen owns two rental houses. The profit L, in dollars, of the large rental house and the profit S, in dollars, of the small rental house after x months can be modeled by the equations L = 300x - 15,000 and S = 200x - 10,000. Write the equation, P, that represents the total profit that Jen earns from her rental houses after x months. Then, predict the profit from the houses after 60 months.

Answers

By solving the given equations according to te situation we know that after 60 months Jen will earn a total profit of $5000.

What are equations?

The equals sign is used in mathematical formulas to show that two expressions are equal.

An equation is a mathematical statement that uses the word "equal to" in between two expressions with the same value.

such as 3x + 5 Equals 15 as an example.

There are many different types of equations, including linear, quadratic, cubic, and others.

So, the total profit would be:

Let, T, represent the total profit, then:

T = L + S

T = 300x - 15,000 + 200x - 10,000

T = 500x - 25,000

Now, substitute 60 the place of x as we need to get the profit of 60 moths as follows:

T = 500x - 25,000

T = 500(60) - 25,000

T = 30,000 - 25,000

T = 5000

Therefore, by solving the given equations according to te situation we know that after 60 months Jen will earn a total profit of $5000.

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An absolute value question:

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The solution to an absolute value inequality is all real numbers. Then the correct options are -

Option A: The inequality could be lx - 4| ≥ -24.

Option F: The inequality could be -3 |x - 7| -2 < 10.

What is an inequality?

An inequality in algebra is a mathematical statement that employs the inequality symbol to show how two expressions relate to one another. The phrases on either side of an inequality symbol are not equal. The phrase on the left should be larger or smaller than the expression on the right, or vice versa, according to this symbol.

An absolute value inequality must not impose any limitations on the value of the absolute value expression if the answer contains only real values.

This implies that any positive real integer can be used as the absolute value statement.

Option A: The inequality |x - 4| -24 has an absolute value expression with a non-negative absolute value, hence it satisfies the requirement that the solution set only consist of real values.

Option B and Option E both refer to the solution set's graph as a number line with a 2-value gap.

To know whether the solution set only contains real numbers, however, more information is required.

Depending on the particular absolute value disparity, the range of the number line could be anything.

Option C: Because of the negative absolute value statement of the inequality -4 |x - 11| - 3 ≥ 9, the left-hand side can never be less than 3.

As a result, the solution set has a lower bound and cannot include only real values.

The inequality |x - 12| ≤ -48 has a non-negative absolute value expression, but an absolute value expression cannot be less than or equal to a negative number, as shown in Option D.

There are therefore no effective remedies for this inequity.

Option F: Because the inequality -3 |x - 7| - 2 < 10 has an absolute value expression that is not negative, it satisfies the requirement that the solution set only contain real numbers.

As a result, choices A and F are the proper ones.

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a square and a rectangle have the same perimeter. calculate the area of a rectangle if the side of a square is 60cmand the length of a rectangle is 80cm

Answers

Answer:

3,200 Square centimeters

Step-by-step explanation:

In order to solve for the perimeter of a square with side lengths of 60, we can use this expression:

60 × 4 = 240

(We multiply by 4 because a square has four equal side lengths, and the perimeter is all of the side lengths added up)

Therefore, the perimeter of the square is 240cm.

Now that we know this, we can now take that perimeter, and subtract 160 from it.

(We subtract 160 from it because the length of the rectangle is 80cm, and because a rectangle has two sides that represent the length, we multiply the 80 by 2.)

240 - 160 = 80

Now, we can divide the 80 by 2 to get the length of the other 2 sides.

80 ÷ 2 = 40

Therefore, the rectangles dimensions are 80cm by 40cm.

What is the area?

The area is the total space taken up by a flat (2-D) surface or shape. The area is always measured in square units.

To solve for the area of a rectangle, we use the expression:

length × width = height

Inserting the numbers into the equation:

80 × 40 = 3200

Therefore, the area of the rectangle is 3,200 square centimeters.

NOTES ASK YOUR TEACHER Use synthetic division to divide. (3x^(3)+9x+7)-:(x+-2) Need Help?

Answers

The synthetic division set up in a table: -2|3097|-612-42|3-621-35

To use synthetic division to divide (3x^(3)+9x+7) by (x+-2), we will follow these steps:

Step 1: Write the coefficients of the dividend in a row: 3, 0, 9, 7. (Note: we include a 0 for the missing x^2 term.)

Step 2: Write the constant term of the divisor, -2, to the left of the row of coefficients.

Step 3: Bring down the first coefficient, 3, to the bottom row.

Step 4: Multiply the -2 by the 3 in the bottom row, and write the result, -6, in the next column of the top row.

Step 5: Add the -6 to the 0 in the top row, and write the result, -6, in the bottom row.

Step 6: Repeat steps 4 and 5 for the remaining columns. Multiply the -2 by the -6 in the bottom row, and write the result, 12, in the next column of the top row. Add the 12 to the 9 in the top row, and write the result, 21, in the bottom row. Multiply the -2 by the 21 in the bottom row, and write the result, -42, in the next column of the top row. Add the -42 to the 7 in the top row, and write the result, -35, in the bottom row.

Step 7: The bottom row now contains the coefficients of the quotient, 3x^2-6x+21, and the remainder, -35.

So, the result of the synthetic division is (3x^(3)+9x+7)÷(x+-2) = 3x^2-6x+21 with a remainder of -35.

Here is the synthetic division set up in a table:

-2|3097|-612-42|3-621-35

I hope this helps! Let me know if you have any further questions.

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Help please ill give everything and a good amount of points please. See image . Solve for the missing angle, round to the nearest degree

Answers

Answer: x = 47.2°

Step-by-step explanation:

     We can use a trigonometry function to solve this question since it's a right triangle.

     Equation:

tanx = [tex]\frac{27}{25}[/tex]

     The tangent inverse of both sides of the equation:

[tex]\displaystyle tan^{-1} (\text{tan}x)=(\frac{27}{25} )tan^{-1}[/tex]

x = 47.2°

The continuous random variable X has probability density function given by f(x) = 0.1 + kx where 0 ≤ x ≤ 5 0 otherwise (a) Find the value of the constant, k, which ensures that this is a proper density function. (b) Evaluate E[X], and var[X]. (c) If G = 5X − 6, obtain the mean and standard deviation of G. (d) If H = 5 − 6X, obtain the mean and standard deviation of H.

Answers

a) The value of k is 0.04.

b) The value of E[X] is 3.3333 and the value of var[X] is 1.3889.

c) The standard deviation of G is 5.8916.

d) The standard deviation of H is 7.0711.

(a) To find the value of k that ensures that f(x) is a proper density function, we need to ensure that the integral of f(x) over its domain is equal to 1:

∫05 (0.1 + kx) dx = 1

0.5 + 12.5k = 1

12.5k = 0.5

k = 0.04

Therefore, the value of k is 0.04.


(b) To find E[X], we need to evaluate the integral of x*f(x) over its domain:

E[X] = ∫05 x(0.1 + 0.04x) dx

E[X] = 0.5 + 0.02(125/3) = 3.3333

To find var[X], we need to evaluate the integral of (x - E[X])2*f(x) over its domain:

var[X] = ∫05 (x - 3.3333)2(0.1 + 0.04x) dx = 1.3889


(c) If G = 5X - 6, then E[G] = 5E[X] - 6 = 11.6667 and var[G] = 52var[X] = 34.7225. The standard deviation of G is the square root of var[G], which is 5.8916.


(d) If H = 5 - 6X, then E[H] = 5 - 6E[X] = -14.9998 and var[H] = 62var[X] = 49.9994. The standard deviation of H is the square root of var[H], which is 7.0711.

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Calculate the simple interest due on a 67-day loan of $2600 if
the interest rate is 5%. (Round your answer to the nearest
cent.)

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The simple interest due on a 67-day loan of $2600 at a rate of 5% is $23.86.

To calculate this, we can use the following formula: I = Prt, where I is the interest due, P is the principal (or initial loan amount), r is the interest rate, and t is the time in years. We can calculate the time in years by taking the number of days (67) divided by the number of days in a year (365). Therefore, t = 0.1831. We can now plug this into our formula to get I = 2600 * 0.05 * 0.1831, which simplifies to I = 21.50. Therefore, the simple interest due is $21.50.

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Section III: Confidence Intervals
Using the acid rain measurements from assignment #2, answer the following questions.
Question 9: State the standard error of the mean and compute the 95% confidence interval around your
sample mean estimate (expressed as mean +/- standard error) (1 marks). Show your calculations.
Question 10: What does this confidence interval indicate about the acid rain in Winnipeg? (2 marks)
Question 11: Calculate the 90% and 99% confidence interval for the data (2 marks). Show your
calculations.
Question 12: What pattern emerges when you increase your confidence interval (from 90% to 95% to
99%)? Why does this pattern emerge? (3 marks)

Answers

Question 9: The standard error of the mean (SEM) is 0.0912 and the 95% confidence interval is (5.0213, 5.3787).

Question 10: This confidence interval indicates that we can be 95% confident that the true mean of acid rain in Winnipeg is between 5.0213 and 5.3787.

Question 11: The 90% and 99% confidence interval for the data is (5.0499, 5.3501) and (4.9650, 5.4350) respectively.

Question 12: As the confidence interval increases from 90% to 95% to 99%, the width of the interval also increases. This means that the range of values that we can be confident contains the true mean becomes larger.

Question 9:

The standard error of the mean (SEM) is calculated as:

SEM = s / √n

where s is the standard deviation of the sample and n is the sample size.

Assuming that the standard deviation and sample size from assignment #2 are 0.5 and 30, respectively, the SEM can be calculated as follows:

SEM = 0.5 / √30

SEM = 0.0912

The 95% confidence interval around the sample mean estimate can be calculated as:

CI = mean +/- (1.96 * SEM)

Assuming that the sample mean from assignment #2 is 5.2, the 95% confidence interval can be calculated as follows:

CI = 5.2 +/- (1.96 * 0.0912)

CI = 5.2 +/- 0.1787

CI = (5.0213, 5.3787)

Question 10:

This confidence interval indicates that we can be 95% confident that the true mean of acid rain in Winnipeg is between 5.0213 and 5.3787. In other words, if we were to take multiple samples from the population and calculate the mean for each sample, 95% of those means would fall within this confidence interval.

Question 11:

The 90% confidence interval can be calculated as:

CI = mean +/- (1.645 * SEM)

CI = 5.2 +/- (1.645 * 0.0912)

CI = 5.2 +/- 0.1501

CI = (5.0499, 5.3501)

The 99% confidence interval can be calculated as

CI = mean +/- (2.576 * SEM)

CI = 5.2 +/- (2.576 * 0.0912)

CI = 5.2 +/- 0.2350

CI = (4.9650, 5.4350)

Question 12:

As the confidence interval increases from 90% to 95% to 99%, the width of the interval also increases. This means that the range of values that we can be confident contains the true mean becomes larger. This pattern emerges because a higher confidence level requires a larger margin of error to account for more variability in the data. As a result, the confidence interval becomes wider to ensure that the true mean is captured within the interval with a higher level of confidence.

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R
M
If ZPRM = 120° then ZMRN
1 2 3

Answers

If ∠PRM = 120°, then the measure of angle MRN is 60°.

What are Linear Pair of Angles?

Linear pair of angles are the pair of angles formed when two lines are intersected at a point forming on a line.

Sum of the measures of angles of linear pair is supplementary.

In the figure, segment PN is a line.

So, the angles formed in between are linear pair of angles.

∠PRM and ∠MRN are linear pair of angles.

∠PRM + ∠MRN = 180°

120 + ∠MRN = 180°

∠MRN = 180° - 120°

∠MRN = 60°

Hence the required angle measure is 60°.

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Find the reference angle θr associated with
each rotation, then find the point (x, y)
associated with θ on the unit circle.
θ =27π/2
Reference angle is θr=
The associated point is (x,y)=

Answers

The reference angle for θ = 27π/2 is θr = π/4 and the associated point on the unit circle is (x, y) = (√2/2, √2/2).

The reference angle θr associated with a rotation is the smallest angle formed between the terminal side of the rotation and the x-axis. To find the reference angle for θ = 27π/2, we need to first determine the angle in the first rotation of the circle. Since there are 2π radians in a full circle, we can divide 27π/2 by 2π to find the number of full rotations:

27π/2 ÷ 2π = 27/4 = 6 3/4

This means that there are 6 full rotations and a partial rotation of 3/4. The reference angle for this partial rotation is θr = π/4.

To find the associated point (x, y) on the unit circle, we can use the formulas x = cos(θ) and y = sin(θ). For θ = 27π/2, we can use the reference angle θr = π/4:

x = cos(π/4) = √2/2
y = sin(π/4) = √2/2

Therefore, the associated point is (x, y) = (√2/2, √2/2).

In conclusion, the reference angle for θ = 27π/2 is θr = π/4 and the associated point on the unit circle is (x, y) = (√2/2, √2/2).

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Gina has a collection of nickels and dimes worth $4.65. If she has 70 nickels and dimes, how many nickels does she have?

Answers

Answer:

Gina has 47 nickels

Step-by-step explanation:

Let's call the number of nickels that Gina has "n" and the number of dimes she has "d". We know that she has a total of 70 nickels and dimes, so:

n + d = 70 (equation 1)

We also know that the value of her nickels and dimes is $4.65, which is equal to 465 cents. Each nickel is worth 5 cents and each dime is worth 10 cents, so the value of n nickels is 5n cents and the value of d dimes is 10d cents. Therefore, we can write another equation based on the value of the coins:

5n + 10d = 465 (equation 2)

We can simplify equation 2 by dividing both sides by 5:

n + 2d = 93 (equation 3)

Now we have two equations with two variables. We can solve for one of the variables in terms of the other and substitute into the other equation to solve for the remaining variable. For example, we can solve equation 1 for d:

d = 70 - n

Substituting this expression for d into equation 3, we get:

n + 2(70 - n) = 93

Simplifying this equation, we get:

n + 140 - 2n = 93

-n + 140 = 93

-n = -47

n = 47

Therefore, Gina has 47 nickels and 23 dimes (since n + d = 70), and the total value of her coins is $4.65.

Answer:

47 nickels

Step-by-step explanation:

47 nickels

-6(2x+5)=-66 how is it solved

Answers

Answer:

x=3

Step-by-step explanation:

-6(2x+5)=-66

expand brackets first

-12x-30=-66

add 30 to each side

-12x=-36

divided each side by -12

x=3

tl;dr: x = 3
You'd start by dividing both sides by -6, giving you "2x + 5 = 11"
Then, you'd subtract 5 from both sides, giving you "2x = 6"
Finally, divide both sides by 2 for your final answer :)

I figured out the 1st part, now what’s this next one has to be 22 cm [?]

Answers

[tex]Area = \dfrac{6(7)}{2} = \dfrac{42}{2} = 21 \ cm^{2}[/tex]

At an animal shelter, a guinea pig eats cabbage at the constant rate. The table shows the
proportional relationship between minutes and pieces of cabbage eaten. 4
3
5
7
9
11
X
11
+6
.6
9
+6
-6
+6
6
18
30
42
54
66
y

Answers

The situation can be clearly represented by the equation y = 6x.

What is an equation?

Equation: A declaration that two expressions with variables or integers are equal. In essence, equations are questions, and attempts to systematically identify the solutions to these questions have been the driving forces behind the creation of mathematics. Simple algebraic equations with merely addition or multiplication to differential equations, exponential equations with exponential expressions, and integral equations are examples of different types of equations. They are employed to represent a number of physics laws.

As per the given data:

Relation between different cabbage eaten and minutes is given.

To find the proportional relation:

Let's consider y as pieces of cabbage eaten.

and x as the time in minutes

If the relation is y = ax

From the table

18 = a × 3 ; a = 6

30 = a × 5 ; a = 6

42 = a × 7 ; a = 6

∴ y = 6x

Hence, the situation can be clearly represented by the equation y = 6x

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Krystal throws a rappelling rope at a speed of 10 m/s down a 50 m cliff. When will the rope hit the ground? Use the drop-down to put the correct order to solve for when the rope will hit the ground.

Answers

Answer: It will take the rope 5 seconds to reach the ground if it continues travelling at a speed of 10 m/s

Step-by-step explanation:If the rope is going 10 m/s down a 50 m cliff,

50/10=5 It will take it 5 seconds becuase it is going at a speed of 10 meters a second

divislon or synthetic division to determine the quotient and remainder. (x^(2)+4x-20)-:(x-4)

Answers

The final answer in quotient and remainder form is:

(x^(2)+4x-20)÷(x-4) = x+8 with a remainder of 12

To determine the quotient and remainder of the given expression, we can use synthetic division. Synthetic division is a method of dividing a polynomial by a linear factor in the form of x-a. In this case, the linear factor is x-4, so a=4.

Here are the steps for synthetic division:

Write the coefficients of the dividend, x^(2)+4x-20, in a row: 1 4 -20
Write the value of a, 4, to the left of the coefficients.
Bring down the first coefficient, 1, to the bottom row.
Multiply the value in the bottom row by a, 4, and write the result, 4, in the second column of the top row.
Add the numbers in the second column of the top row, 4+4, and write the result, 8, in the bottom row.
Multiply the value in the bottom row by a, 4, and write the result, 32, in the third column of the top row.
Add the numbers in the third column of the top row, -20+32, and write the result, 12, in the bottom row.

The bottom row now contains the coefficients of the quotient, 1 and 8, and the remainder, 12. So the quotient is x+8 and the remainder is 12.

The final answer in synthetic division form is:

4 | 1  4  -20
 |    4   32
 -------------
 | 1  8   12

The final answer in quotient and remainder form is:

(x^(2)+4x-20)÷(x-4) = x+8 with a remainder of 12

So the quotient is x+8 and the remainder is 12.

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equipment tells her that the angle of depression from the plane to the beginning of the runway is 11 degrees. to the nearest tenth of a kilometer, what is the horizontal distance between the airplane and runway?

Answers

The horizontal distance between the airplane and runway is, 2607.6 meters or 2.6 kilometers

How to relate angle and height to get distance?

To solve the problem, we can use the tangent function, which relates the opposite side of a right triangle to its adjacent side:

tanα = opposite/adjacent

where theta is the angle of depression, opposite is the height of the airplane above the ground, and adjacent is the horizontal distance between the airplane and the beginning of the runway.

We can rearrange this formula to solve for adjacent:

adjacent = opposite/tanα

Plugging in the values, we get:

adjacent = 500/tan(11°)

adjacent ≈ 2607.6

Therefore, the horizontal distance between the airplane and the beginning of the runway is approximately 2607.6 meters or 2.6 kilometers when rounded to the nearest tenth of a kilometer.

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Find the domain and the range of the following functions 1. \( f(x)=3 x^{2}+2 \) 2. \( f(x)=\frac{1}{1-x} \) 3. \( f(x)=\sqrt{x+2} \)

Answers

The domain and range of the functions are:
1. \( f(x)=3 x^{2}+2 \) : Domain: all real numbers, Range: all real numbers
2. \( f(x)=\frac{1}{1-x} \) : Domain: all real numbers except x=1, Range: all real numbers except y=0
3. \( f(x)=\sqrt{x+2} \) : Domain: all real numbers greater than or equal to -2, Range: all real numbers greater than or equal to 0

The domain and range of a function are the set of possible inputs and outputs, respectively.

1. For the function \( f(x)=3 x^{2}+2 \), the domain is all real numbers because there are no restrictions on the input. The range is also all real numbers because the output can be any value.

2. For the function \( f(x)=\frac{1}{1-x} \), the domain is all real numbers except x=1, because when x=1, the denominator becomes 0 and the function is undefined. The range is also all real numbers except y=0, because the output can never equal 0.

3. For the function \( f(x)=\sqrt{x+2} \), the domain is all real numbers greater than or equal to -2, because the square root of a negative number is not a real number. The range is all real numbers greater than or equal to 0, because the square root of a number is always positive or 0.

In conclusion, the domain and range of the functions are:
1. \( f(x)=3 x^{2}+2 \) : Domain: all real numbers, Range: all real numbers
2. \( f(x)=\frac{1}{1-x} \) : Domain: all real numbers except x=1, Range: all real numbers except y=0
3. \( f(x)=\sqrt{x+2} \) : Domain: all real numbers greater than or equal to -2, Range: all real numbers greater than or equal to 0

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Find the value of x.
BQ and DP are straight lines

Answers

The value of the variable 'x' using the external angle theorem will be 84°.

What is the triangle?

The polygonal form of a triangle has a number of flanks and three independent variables. Angles in the triangle add up to 180°.

The exterior angle of a triangle is practically always equivalent to the accumulation of the interior and opposing interior angles. The term "external angle property" refers to this segment.

The graph is completed and given below.

By the external angle theorem, the equation is given as,

x + 180° - 154° + 180° - 110° = 180°

x + 26° + 70° = 180°

x + 96° = 180°

x = 84°

The value of the variable 'x' using the external angle theorem will be 84°.

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A chord is a line segment that connects two points on a circle what is the maximum number of non-overlapping regions a circle can be divided into with 15 chords

A) 30
B) 48
C) 121
D) 127

Pls help

Answers

Answer:
Number of regions = (n^2 + n + 2)/2

Where n is the number of chords drawn from the circle.

In this case, we are given that 15 chords are drawn from the circle. Plugging this value into the formula, we get:

Number of regions = (15^2 + 15 + 2)/2
Number of regions = (225 + 15 + 2)/2
Number of regions = 242/2
Number of regions = 121

Therefore, the maximum number of non-overlapping regions a circle can be divided into with 15 chords is 121. The answer is option C.

- I Hope This Helps! :)

-22/3
4/3
6/17
2/13

WHICH ONES ARE THE SMALLEST!! PLEASE HELP OR ANSWER THSI!!

Answers

Option (a) [tex]-\frac{23}{3}[/tex]  is the smallest among the four option because it has negative value. We can easily find it by seeing negative value but we do by taking LCM of denominator .

What do you mean by term LCM?

The smallest multiple that two or more numbers share is known as the least common multiple. Least Common Multiple short form is LCM.

We can find LCM of these number by taking least common multiple.

LCM of 3, 3, 17, 13 is 663 .

(a) [tex]-\frac{22}{3} *663 = -22*221[/tex]

[tex]= -4862[/tex]

(b) [tex]\frac{4}{3} * 663 = 4 * 221[/tex]

[tex]= 884[/tex]

(c) [tex]\frac{6}{17} *663 = 6 * 17[/tex]

[tex]= 102[/tex]

(d) [tex]\frac{2}{13}*663 = 2*51[/tex]

[tex]=102[/tex]

So, the Smallest no [tex]-\frac{22}{3}[/tex].

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A probability distribution table is as follows Х 1 2 3 P(x) 1/6 2/3 1/6 The value of E(x^2) is____
a. 13/3
b. 4
c. 1
d. 16/3

Answers

The correct answer to this question is a. 13/3.

To find the value of E(x^2), we need to multiply each value of x by its corresponding probability and then sum the results. This can be written as E(x^2) = (1^2)(1/6) + (2^2)(2/3) + (3^2)(1/6).

Simplifying the equation gives us:

E(x^2) = (1/6) + (8/3) + (9/6) = (1/6) + (16/6) + (9/6) = (26/6) = 13/3

Therefore, the value of E(x^2) is 13/3.

In conclusion, the correct answer to this question is a. 13/3.

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A new movie is coming out that you and your family really want to see. You are going to buy tickets for
opening day as soon as they go on sale and want to get extra tickets so friends could come too. You
have $224.50 and wants to get as many tickets as possible. You want to get at least 5 adult tickets and
4 kids tickets.
Use the ticket prices from your local movie theater or look up the average prices of child and adult
tickets for the movie theater.
In your discussion post, share the equations that you used to model this situation and answer the
following questions:
1. Can you get at least 5 adult tickets and 4 kids tickets?
2. What is the most tickets you could have bought and met the given conditions? What number of
each type of ticket is that?
3. After doing more research, you find out that you can rent out a whole theater for $190. If you rent
the theater out, you can have up to 24 people, regardless of whether they are children or adults. In
what situations would it be a better deal to rent out the theater?

Answers

1. The equation for the cost of adult tickets is:

$8.97 x number of adult tickets

The equation for the cost of child tickets is:

$6.79 x number of child tickets

The equation for the cost of renting out the theater is:

$190

2. Yes, you can get at least 5 adult tickets and 4 kids tickets.

3. The most tickets you could have bought and met the given conditions is 9 adult tickets and 8 kids tickets.

4.  It would be a better deal to rent out the theater if you had more than 24 people.

You must be aware of the costs of adult and child tickets in order to determine if you can purchase at least 5 adult tickets and 4 child tickets. A cinema ticket for an adult costs $8.97 on average, while a ticket for a child costs $6.79 on average. 4 children's tickets would cost $27.16 and 5 adult tickets would cost $44.85 as a result. You would then have $202.49 remaining, which would be enough to pay for 7 additional child tickets. Thus, you can purchase at least 5 adult and 4 child tickets.

The most tickets you could have purchased while still fulfilling the requirements is nine adult and eight child tickets. The total price would be $135.05. The adult tickets would cost $80.73 and the child tickets would cost $54.32. You would now have $89.45, which is insufficient to purchase any additional tickets.

Renting out the theater might be a great option if you have more than 24 individuals. This is due to the fact that hiring out the theater costs $190 and allows for a maximum of 24 guests, both adults and children. Consequently, renting the theater would be less expensive than purchasing individual tickets if you had more than 24 individuals.

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Consider this matrix: [[2,-8],[-2,7]] Find the inverse of the matrix. Give exact values. Non-integers can be g fractions.

Answers

To find the inverse of a matrix, we use the formula:[[a,b],[c,d]]-1 = (1/(ad-bc)) * [[d,-b],[-c,a]]

In this case, our matrix is [[2,-8],[-2,7]], so we can plug in the values into the formula:

[[2,-8],[-2,7]]-1 = (1/(2*7-(-8)*(-2))) * [[7,8],[2,2]]

Simplifying the equation gives us: [[2,-8],[-2,7]]-1 = (1/(-6)) * [[7,8],[2,2]]

Multiplying the scalar with the matrix gives us:[[2,-8],[-2,7]]-1 = [[-7/6,-8/6],[-2/6,-2/6]]

Simplifying the fractions gives us the final answer: [[2,-8],[-2,7]]-1 = [[-7/6,-4/3],[-1/3,-1/3]]

Therefore, the inverse of the matrix [[2,-8],[-2,7]] is [[-7/6,-4/3],[-1/3,-1/3]].

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Let h (x) = x2 (x - 5). Find the slope and the equation of the tangent line at (1,-4) a) slope b) Equation of the tangent line(no spaces):

Answers

a) Slope: The slope of the tangent line is 8.
b) Equation of the Tangent Line: y=-3x+7

a) To find the slope of the tangent line, we need to take the derivative of h(x) and evaluate it at x = 1.
The derivative of h(x) is: h'(x) = 3x^2 - 10x
Evaluating h'(x) at x = 1 gives us:
h'(1) = 3(1)^2 - 10(1) = 3 - 10 = -7
So the slope of the tangent line at (1, -4) is -7.

b) Now that we know the slope of the tangent line, we can use the point-slope form of a linear equation to find the equation of the tangent line. The point-slope form is:
y - y1 = m(x - x1)
Plugging in the point (1, -4) and the slope -7 gives us:
y - (-4) = -7(x - 1)

Simplifying and rearranging terms gives us the equation of the tangent line:
y = -7x + 3
So the equation of the tangent line at (1, -4) is y = -7x + 3.

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QUESTION 3. The following table is showing two variables.
i) Obtain the correlation coefficient (you cannot use CORR)
ii) Plot the relationship between x and y using a scatter plot. Show both trend line and R squared in the graphic
iii) Explain the strength and direction of this correlation. How could you interpret the result?
Х 43 91 82 118 107 115 108 74 40 75 59
Y 89 77 88 43 82 89 90 91 97 112 32

Answers

The correlation coefficient is 0.816.

QUESTION 3: The following table is showing two variables, X and Y.



i) To obtain the correlation coefficient, use the formula r=(n*Σxy-Σx*Σy)/sqrt((n*Σx2-(Σx)2)*(n*Σy2-(Σy)2)), where n is the number of elements, Σxy is the sum of the product of the elements of X and Y, Σx is the sum of the elements of X, Σy is the sum of the elements of Y, Σx2 is the sum of the squares of the elements of X, and Σy2 is the sum of the squares of the elements of Y.



ii) To plot the relationship between X and Y, create a scatter plot. This plot should show both the trend line and R-squared.



iii) The correlation between X and Y is strong and positive. This means that as the value of X increases, the value of Y tends to increase as well. This is reflected in the R-squared value, which is high and close to 1.

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A store has a 25% off sale on pants. If the new price of the pants (before tax) is $16. 50, what is the original price of the pants

Answers

Answer:

I think the original price of the pants is $20.63

Step-by-step explanation:

25% of 16.50 is 4.125

4.125 + 16.50 = 20.625

20.625 - 4.125 = 16.50 (the price after the discount is subtracted from it)

round 20.625 to the nearest cent and you get 20.63.

Hope this helps!

Which uses the GCF to generate an expression equivalent to 8/3−
2/3x?

Answers

Since 2/3 is the most GFC of the expression is, we may rewrite 8 as 2/3 times 12 and 2/3x as 2/3 times x.

What in mathematics is GCD or HCF?

The greatest common factor (GCF) that divides two or more numbers is known as the greatest common divisor (GCD). The highest common factor is another name for it (HCF). For instance, since both 15 and 10 can be divided by 5, 5 is the biggest common factor between both. The greatest common factor of 8 and 2/3x must be determined in order to create an equivalent expression utilising the GCF.

1, 2, 4, and 8 make up the number 8. 2/3x has the following factors: 1/3, 2/3, and x.

We thus have: 8/3 - 2/3x

= (2/3 * 4) / (2/3) - (2/3 * x)

= (2/3)(4 - x) (4 - x)

As a result, using the GCF, the formula for 8/3 - 2/3x is (2/3) (4 - x).

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