Math
learning
area of circles - item 34972
the diameter of a quarter is about 1 in.
you trace around the edge of the quarter on a sheet of paper.
what is the area of the circle on the paper?
use 3. 14 as an approximation for a round your answer to the nearest tenth,

Step-by-step explanation:

yeah -77 is an integer

A whole numbers with + or - sign is an integer

Answer:

Step-by-step explanation:

An interger is a whole number. All numbers excluding decimal numbers and fractions. So yes -77 is an interger.

So, Lana gave away 26.32% of he Pokemon cards  to her little brother.

To find the percentage of cards Lana gave away, we can use the formula:(Quantity given away / Total quantity) * 100.

In this case, Lana gave away 125 cards out of her total collection of 475 cards.Plugging these values into the formula, we have:

(125 / 475) * 100 = 0.2632 * 100 = 26.32%.

Lana gave away 26.32% of her Pokemon cards to her little brother.

Alternatively, we can calculate the percentage by subtracting the remaining cards from the total and finding the ratio:

Percentage given away

= (Cards given away / Total cards) * 100

= (125 / 475) * 100

= 26.32%.

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Answer:

Step-by-step explanation:

1. Equation

3x + 4 = 25

2. Subtract 4 from both sides

3x + 4 = 25

     - 4    - 4

3. Solve

3x = 21

4. Divide both sides by 3

3x = 21

/3     /3

5. Solve

x = 7

Answer: SYSTEMS OF EQUATIONS in TWO VARIABLES. A system of equations is a collection of two or more equations with the same set of unknowns. In solving a system of equations, we try to find values for each of the unknowns that will satisfy every equation in the system. The equations in the system can be linear or non-linear.

Step-by-step explanation:

Answer:

Gwen's and Tristan's. Keith already has the same equation as Gwen, so it won't help us find out the cost of the entry fee and the cost of each ticket.

The calculation shows that winning a match and losing a match are mutually exclusive events with a joint Probability of zero.

To show that winning a match and losing a match are mutually exclusive events, we need to demonstrate that the probability of both events occurring at the same time is zero.

Given that Wellton Cove Cricket Club either wins or loses a match with a probability of 0.9, we can calculate the probability of winning a match as P(W) = 0.9 and the probability of losing a match as P(L) = 0.9.

Since winning and losing are mutually exclusive events, the probability of both events occurring simultaneously is zero. Mathematically, this can be expressed as:

P(W and L) = 0

This equation represents the joint probability of winning a match and losing a match, which should be zero if the events are mutually exclusive.

In this case, the probability of winning a match is 0.9, and the probability of losing a match is also 0.9. Since the probability of both events occurring simultaneously is zero, we can conclude that winning a match and losing a match are indeed mutually exclusive events.

Therefore, the calculation shows that winning a match and losing a match are mutually exclusive events with a joint probability of zero.

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Answer:

Step-by-step explanation:

To solve this problem, we need to find the Greatest Common Factor (GCF) which is the greater factor possible in common for all three numbers 5000, 2500 and 245 liters.

5,000 | 2

2,500 | 2

1,250  | 2

625    | 5

125     | 5

25      | 5

5        | 5

1

So, \(5,000 = 2 \times 2 \times 2 \times 5 \times 5 \times 5 \times 5\), \(2,500 = 2 \times 2 \times 5 \times 5 \times 5 \times 5\)

245 | 5

49   | 7

7     | 7

1

\(245 = 5 \times 7 \times 7\)

As you can observe, the greatest common factor is 5, because it's the greater number in common for all three numbers.

Therefore, the greatest recipient possible must be 5 liters capacity.

\((\stackrel{x_1}{1}~,~\stackrel{y_1}{2})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{4}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{4}-\stackrel{y1}{2}}}{\underset{run} {\underset{x_2}{5}-\underset{x_1}{1}}}\implies \cfrac{2}{4}\implies \cfrac{1}{2}\)

Answer:

D. The money that Kai started with before he mowed any lawns.

Step-by-step explanation:

We Know

The equation is y = mx + b

The x represents the number of lawns that Kai mows.

What does the y-intercept represent in this equation?

The y-intercept is when the x = 0, meaning the y-intercept is the amount of money he has when mowing 0 lawn. So, the answer is D.

Answer:

The Answer is D

Step-by-step explanation:

To find the zeros of y = tan(2x), we need to solve the equation sin(2x) = 0 to determine the x-values where sin(2x) is zero. These x-values will correspond to the zeros of the function tan(2x).

To find the zeros of the function y = tan(2x), we can utilize the fact that tan(x) is equal to sin(x)/cos(x).

Given y = tan(2x), we can rewrite it as:

y = sin(2x) / cos(2x)

Now, let's consider the numerator of this expression, which is sin(2x). If we set sin(2x) equal to zero, we can determine the values of x that make the numerator zero:

sin(2x) = 0

By solving this equation, we can find the zeros of sin(2x). The solutions will be the values of x for which sin(2x) equals zero.

Similarly, we can look at the denominator of the expression y = sin(2x) / cos(2x), which is cos(2x). If cos(2x) equals zero, the denominator will be zero, which leads to undefined values for y. These points will be vertical asymptotes of the function tan(2x).

To find the zeros of y = tan(2x), we need to solve the equation sin(2x) = 0 to determine the x-values where sin(2x) is zero. These x-values will correspond to the zeros of the function tan(2x).

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Bilinear transformation which maps the upper half plane into the unit disk and Imz outo I wisi and the point Zão onto the point wito is given by:(z - Zão)/ (z - Zão) * conj(Zão))

where Zão is the image of a point Z in the upper half plane, and I wisi and Ito represent the imaginary parts of z and w, respectively.

This transformation maps the real axis to the unit circle and the imaginary axis to the line Im(w) = Im(Zão).

To prove this claim, we first note that the image of the real axis is given by:z = x, Im(z) = 0, where x is a real number.Substituting this into the equation for the transformation,

\(we get:(x - Zão) / (x - Zão) * conj(Zão)) = 1 / conj(Zão) - x / (Zão * conj(Zão))\)

This is a circle in the complex plane centered at 1 / conj(Zão) and with radius |x / (Zão * conj(Zão))|.

Since |x / (Zão * conj(Zão))| < 1 when x > 0, the image of the real axis is contained within the unit circle.

Now, consider a point Z in the upper half plane with Im(Z) > 0. Let Z' be the complex conjugate of Z, and let Zão = (Z + Z') / 2.

Then the midpoint of Z and Z' is on the real axis, and so its image under the transformation is on the unit circle.

Substituting Z = x + iy into the transformation, we get:(z - Zão) / (z - Zão) * conj(Zão)) = [(x - Re(Zão)) + i(y - Im(Zão))] / |z - Zão|^2

This is a circle in the complex plane centered at (Re(Zão), Im(Zão)) and with radius |y - Im(Zão)| / |z - Zão|^2.

Since Im(Z) > 0, the image of Z is contained within the upper half plane and its image under the transformation is contained within the unit disk.

Furthermore, since the radius of this circle goes to zero as y goes to infinity, the transformation maps the upper half plane onto the interior of the unit disk.

Finally, note that the transformation maps Zão onto the origin, since (Zão - Zão) / (Zão - Zão) * conj(Zão)) = 0.

To see that the imaginary part of w is Im(Zão), note that the line Im(w) = Im(Zão) is mapped onto the imaginary axis by the transformation z = i(1 + w) / (1 - w).

Thus, we have found a bilinear transformation which maps the upper half plane into the unit disk and Im(z) onto Im(w) = Im(Zão) and the point Zão onto the origin.

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Answer:

A is parallel to c

A is not parallel to b

B is not parallel to c

Step-by-step explanation:

Answer:

a and c are parallel || means parallel

Step-by-step explanation:

Statement.     | Reason

128*+52*=180| Same side exterior Angles

A||c.                 | Same side exterior Angles

138*=128*.       |corresponding angles

B N o|| C         | Corresponding Angles

52*+138*=180*|Corresponding angles

A n o|| B.        | Corresponding Angles

Im from RSM

Answer:

8

Step-by-step explanation:

========================================================

Explanation:

Let's convert the mixed number 5 & 1/3 to an improper fraction.

The formula to use is

a & b/c = (a*c + b)/c

So,

a & b/c = (a*c + b)/c

5 & 1/3 = (5*3 + 1)/3

5 & 1/3 = 16/3

Imagine you had 16 pieces of candy, and imagine you wanted to divide that up amongst 3 friends. Each friend would get 15/3 = 5 whole pieces. There would be 1 candy left over. The 5 and 1 help then form the 5 & 1/3. So this is one way to visualize how 5 & 1/3 is the same as 16/3.

Another way to see why this works is to note how 16/3 = 5.333 approximately. The '5' before the decimal point is the whole part of the mixed number 5 & 1/3; the decimal portion 0.333 is the approximate value of the fractional part 1/3.

------------------

The total length of fencing needed is 16/3 yards. Each section is 2/3 of a yard long. Since both denominators are "thirds", we can ignore them. An equivalent problem is this: "He needs 16 yards of fencing and each section is 2 yards long"

Based on the new problem without fractions involved, we can see that he'll need 16/2 = 8 sections in total.

You should find that dividing (16/3) over (2/3) will lead to 8 as well. You could say this:

(16/3) divide (2/3) = (16/3)*(3/2) = (16*3)/(3*2) = 48/6 = 8

-------------------

An alternative method:

Let's start with 2/3 of a yard. That doubles to 4/3 which is the same as 1 & 1/3. Think of it as 4/3 = (3+1)/3 = 3/3+1/3 = 1+1/3 = 1 & 1/3.

Next, we'll double 1 & 1/3 to land on 2 & 2/3. You simply multiply each '1' by 2 to end up with those '2's shown.

Now we'll double 2 & 2/3 like so:

2*(2 & 2/3) = 2*(2 + 2/3) = 4 + 4/3 = 4 + (1+1/3) = 5 + 1/3 = 5 & 1/3

The act of doubling exactly three times leads to us ultimately multiplying by 2*2*2 = 8, so he needs 8 sections that are each 2/3 of a yard long.

-------------------

Whichever method you prefer, the final answer is 8 sections.

The r function that the data analyst can use to do this automatically is the clean names function.

When it comes to data manipulation, R is an excellent tool. It enables the use of several preprocessed packages, making data manipulation much easier.

Janitor's clean names() function will make all of your variable names consistent in a single line of code.

In R, a data analyst is cleaning up their data. To avoid errors in their analysis, they want to ensure that their column names are unique and consistent. What R function can they use to automate this? The clean names() function will ensure that column names are both unique and consistent.

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Answer:

32.1

Step-by-step explanation:

You add the code chunk arrange(bill_length_mm) to sort the column bill_length_mm in ascending order. The correct code is penguins %>% arrange(bill_length_mm). Inside the parentheses of the arrange() function is the name of the variable you want to sort. The code returns a tibble that displays the data for bill_length_mm from shortest to longest. The shortest bill length is 32.1mm.

Answer:

the length of the rug would be 4.5 feet

Step-by-step explanation:

The approximate measure of angle YZX is 39.4°. Option(B) is the correct answer.

we know that

In the right triangle XYZ

\(tan(Y Z X)= \frac{opposite side angle YZX}{adjacent side angle YZX}\)

In this problem,

Opposite side angle YZX= XY = 12.4cm

Adjacent side angle YZX= YZ = 15.1cm

substitute the values,

\(tan ( Y Z X) = \frac{12.4}{15.1}\)

\(Angle ( Y Z X) = arc tan( \frac{12.4}{15.1} )\)

Angle ( Y Z X) = 39.4°

So,  the approximate measure of angle YZX is 39.4°.

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The complete question is:

In right triangle XYZ, the right angle is located at vertex Y. The length of line segment XY is 12.4 cm. The length of line segment YZ is 15.1 cm. Which is the approximate measure of angle YZX?

A .34.8°

B .39.4°

C .50.6°

D. 55.2°

X and Y are independent random variables, and a and b are constants is

Var(X-Y) = Var(X) + Var(Y)

Now, According to the question:

Let's Know:

Independent random variable:

Two random variables X and Y are independent if

E(XY) = E(X)E(Y).In case of n random variables the formula is extended as

\(E(X_1,X_2,X_3....X_n)=E(X_1)E(X_2)E(X_3)...E(X_n)\)

Are the random variables X and Y independent?

If X and Y are two random variables and the distribution of X is not influenced by the values taken by Y, and vice versa, the two random variables are said to be independent.

Hence, X and Y are independent random variables, and a and b are constants is

Var(X-Y) = Var(X) + Var(Y).

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To determine if a function has a vertical asymptote, you need to consider its behavior as the input approaches certain values.

A vertical asymptote occurs when the function approaches positive or negative infinity as the input approaches a specific value. Here's how you can determine if a function has a vertical asymptote:

Check for restrictions in the domain: Look for values of the input variable where the function is undefined or has a division by zero. These can indicate potential vertical asymptotes.

Evaluate the limit as the input approaches the suspected values: Calculate the limit of the function as the input approaches the suspected values from both sides (approaching from the left and right). If the limit approaches positive or negative infinity, a vertical asymptote exists at that value.

For example, if a rational function has a denominator that becomes zero at a certain value, such as x = 2, evaluate the limits of the function as x approaches 2 from the left and right. If the limits are positive or negative infinity, then there is a vertical asymptote at x = 2.

In summary, to determine if a function has a vertical asymptote, check for restrictions in the domain and evaluate the limits as the input approaches suspected values. If the limits approach positive or negative infinity, there is a vertical asymptote at that value.

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The probability that x is greater than 77. 5 is 0.039828

Given,

Mean, μ = 80

Standard deviation, σ = 25

We have to find z score corresponding to 77.5

z = (x-μ) / σ

   \(=\frac{77.5-80}{25} \\= 0.1\)

Now we have to find P value from Z table:

P(x<77.5) = 0.46017

P(x>77.5) = 1 - P(x<77.5) = 0.53983

P(77.5<x<80) = 0.5 - P(x<77.5) = 0.039828

The probability of x greater than 77.5 is 0.039828

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Answer:

See below

Step-by-step explanation:

Let x rep right handed

Then,

5/8× x

= 5x/8

Since 4/5 are boys

1 - 4/5

1/4

Then,

5x/8 = 1/4

20x = 8

x = 8/20

x = 2/5

Therefore, the fraction of the girls in the school that are left handed is 2/5

Answer:

Length must be between 19 and 29 yards

Step-by-step explanation:

The sum of any two sides must be greater than the third

The expression a² - 2ab + b² - 25 can be rewritten as the product of two trinomial factors: ((a - b) - 5)((a - b) + 5).

To rewrite the expression a² - 2ab + b² - 25 as the product of two trinomial factors, we can use the concept of factoring a perfect square trinomial. The given expression is in the form of a perfect square trinomial, which can be factored as the square of a binomial.

Let's break down the steps to rewrite the expression:

Step 1: Group the first three terms.

The expression a² - 2ab + b² can be grouped as (a² - 2ab + b²).

Step 2: Recognize the expression as a perfect square trinomial.

The grouped expression (a² - 2ab + b²) is a perfect square trinomial because it is the square of the binomial (a - b).

Step 3: Rewrite the expression as the product of two trinomial factors.

Using the formula for factoring a perfect square trinomial, we have:

(a - b)² - 25.

Step 4: Recognize the expression as a difference of squares.

The expression (a - b)² - 25 is a difference of squares because it can be written as (a - b)² - 5².

Step 5: Factor the difference of squares.

Using the formula for factoring a difference of squares, we have:

((a - b) - 5)((a - b) + 5).

Therefore, the expression a² - 2ab + b² - 25 can be rewritten as the product of two trinomial factors: ((a - b) - 5)((a - b) + 5).

In summary, to rewrite the expression a² - 2ab + b² - 25 as the product of two trinomial factors, we group the first three terms and recognize it as a perfect square trinomial. Then, we factor it as ((a - b) - 5)((a - b) + 5) by recognizing it as a difference of squares.

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Answer:

3/70

Step-by-step explanation:

3 orange,6 pink , 1 yellow , and 5 red = 15

P(pink) = number of pink/ total = 6/15 = 3/5

Then without putting it back

3 orange,5 pink , 1 yellow , and 5 red = 14

P(yellow) = number of yellow/ total = 1/14

P(pink, no replacement, yellow) = 3/5*1/14 = 3/70

To eliminate the roots in 1.1 and 1.2, we can use trigonometric substitution. In 1.1, we can substitute x = 4 sin(theta) to eliminate the root of 4. In 1.2, we can substitute z = 7 sin(theta) to eliminate the root of 7.

1.1. V64+2 + 1 We can substitute x = 4 sin(theta) to eliminate the root of 4. This gives us:

V64+2 + 1 = V(16 sin^2(theta) + 2 + 1) = V16 sin^2(theta) + V3 = 4 sin(theta) V3 1.2. V4z2 – 49

We can substitute z = 7 sin(theta) to eliminate the root of 7. This gives us:

V4z2 – 49 = V4(7 sin^2(theta)) – 49 = V28 sin^2(theta) – 49 = 7 sin(theta) V4 – 7 = 7 sin(theta) (2 – 1) = 7 sin(theta)

Here is a more detailed explanation of the substitution:

In 1.1, we know that the root of 4 is 2. We can substitute x = 4 sin(theta) to eliminate this root. This is because sin(theta) can take on any value between -1 and 1, including 2.

When we substitute x = 4 sin(theta), the expression becomes V64+2 + 1 = V(16 sin^2(theta) + 2 + 1) = V16 sin^2(theta) + V3 = 4 sin(theta) V3

In 1.2, we know that the root of 7 is 7/4. We can substitute z = 7 sin(theta) to eliminate this root. This is because sin(theta) can take on any value between -1 and 1, including 7/4.

When we substitute z = 7 sin(theta), the expression becomes: V4z2 – 49 = V4(7 sin^2(theta)) – 49 = V28 sin^2(theta) – 49 = 7 sin(theta) V4 – 7 = 7 sin(theta)

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Hey there!

The answer is \(18\)

To solve this, you simply plug in \(r\) to the expression!

\(11+r; r=7\)

\(11+7\)

\(18\)

Have an amazing day!

Answer:

3+28-5 --> 31-5 --> 26

Step-by-step explanation: