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Given circle E with diameter CD and radius EA. AB is tangent to E at A. If
EC = 3 and EA = 3, solve for AC. Round your answer to the nearest tenth if
necessary. If the answer cannot be determined, click "Cannot be determined."
C
A
B

Therefore, the bottom of the ladder is 17.5 feet from the base of the building.

Distance is a numerical measurement of the physical space between two objects or points. It is the amount of space between two points or objects, usually measured in units such as meters, feet, or miles. Distance can be used to describe the separation between any two entities in space, whether they are tangible objects or abstract concepts. In physics, distance is a fundamental concept that is used to describe the magnitude of displacement, which is the change in position of an object over time. Distance can be calculated using a variety of methods, including measuring with a ruler or tape measure, using GPS technology, or by using mathematical equations that take into account variables such as speed and time.

We can use trigonometric ratios to solve the problem. Let x be the distance between the bottom of the ladder and the base of the building. Then, we can use the cosine ratio to find x:

cos (60°) = adjacent/hypotenuse

0.5 = x/35

x = 0.5 × 35

x = 17.5

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Answer:

4.88%

Step-by-step explanation:

All sides of a square are equal

let x = length of a side

Area = x·x = x²

Estimated area = (8.5)² = 72.25 in²

Actual area = (8.3)² = 68.89 in²

percent error  = (actual area - estimated area) / (estimated area) x 100

% error = (68.89 - 72.25) / (68.89) x 100 = -4.88%     the negative sign means the estimate was higher than the actual.  

The correct statement about the diagonals of a non-square rectangle is "The diagonals bisect a pair of opposite angles"

A rectangle is a four-sided flat shape with opposite sides of equal length and opposite sides that are parallel.

A non-square rectangle is simply a rectangle whose opposite sides are not equal in length. In other words, a non-square rectangle is a rectangle that has two pairs of sides, each of which has a different length.

If a rectangle has sides that are equal in length, it is called a square. However, if the sides are not equal, then it is a non-square rectangle. Non-square rectangles are commonly encountered in everyday life, such as in the shape of paper, books, windows, doors, and many other objects.

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Randomly selected trip: 24.5% chance > $3000. Sample mean of 30 trips: very small chance > $3000.

Utilizing z-score recipe:

z = (x - μ)/σ

where x is the worth we're keen on, μ is the mean, and σ is the standard deviation.For the primary inquiry:

z = (3000 - 2708)/405 = 0.69

Utilizing a standard typical circulation table or number cruncher, we can track down that the likelihood of getting a z-score more prominent than 0.69 is around 0.245. Consequently, the likelihood that the expense for a haphazardly chosen trip is more than 3000 is around 0.245 or 24.5%.

For the subsequent inquiry:

The example size (n) = 30, and the standard deviation (σ) = 405/sqrt(30) = 74.02 (approx.)

z = (3000 - 2708)/74.02 = 3.94

Utilizing a standard typical dissemination table or number cruncher, we can track down that the likelihood of getting a z-score more prominent than 3.94 is tiny, near 0. Consequently, the likelihood that the mean expense of an example of 30 abroad excursions is more noteworthy than 3000 is tiny.

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The probability that the mean is greater than 3000 is 24.5%

A probability is a number that reflects the chance or likelihood that a particular event will occur.

Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%.

Given that, the average overseas trip cost 2708 per visitor, assuming a normal distribution with a standard deviation of 405 what is the probability that the cost for a randomly selected trip is more than 3000

z-score:

z = (x - μ)/σ

where μ is the mean, and σ is the standard deviation.

So,

z = (3000 - 2708)/405 = 0.69

Z-score 0.69 = 0.245.

Thus, the likelihood that the expense of the chosen trip is more than 3000 is around 0.245 or 24.5%.

The sample size (n) = 30, and the standard deviation (σ) = 405/√(30) = 74.02 (approx.)

z = (3000 - 2708)/74.02 = 3.94

z-score 3.94 = 0.

Thus, the likelihood that the mean expense of an example of 30 abroad excursions is more noteworthy than 3000 is tiny.

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Answer:

Step-by-step explanation:

To determine how long your retirement savings will last when withdrawing R2 500 at the beginning of every month, we need to use a financial formula called the future value of an annuity formula, which calculates the future value of a series of equal withdrawals made at regular intervals over a fixed period of time.

In this case, we want to calculate how many months it will take for your retirement savings to be depleted, given that you will be withdrawing R2 500 at the beginning of every month. The formula is:

n = [log(PMT/(PMT - r*PV))]/[log(1+r)]

where:

PMT = R2 500 (the regular payment you will make every month)

r = 7,10%/12 (the monthly interest rate, which is the annual rate of 7,10% divided by 12)

PV = R411 016 (the present value of your retirement savings)

Using the above values in the formula, we get:

n = [log(2500/(2500-((7.10%/12)*411016))))]/[log(1+(7.10%/12))]

n = 182.1

Therefore, it will take approximately 182.1 months, or 15.2 years, until you run out of money, assuming all other factors remain constant, and you withdraw R2 500 at the beginning of each month.

Step-by-step explanation:

To find out how many more people visited Canada than Mexico, we need to subtract the number of visitors to Mexico from the number of visitors to Canada:

12,968,000 - 9,807,000 = 3,161,000

Therefore, 3,161,000 more people visited Canada than Mexico in 2002.

in a symmetric distribution, the value that could be the median of the distribution must be equal to the mean.

In probability and statistics, the mean and median are two measures of central tendency that are commonly used to describe a data set. The mean, also known as the arithmetic mean or average, is calculated by summing up all the values in the data set and dividing by the total number of values. The median, on the other hand, is the middle value of a data set when the values are arranged in order from lowest to highest.

For a symmetric distribution, the mean and median are the same, because the data values on one side of the mean balance out the values on the other side. In other words, if the distribution is symmetric, then the data values are evenly distributed around the mean.

In this case, if the mean of a symmetric distribution is 130, then the median must also be 130. This is because the median is the middle value of the data set, and in a symmetric distribution, the middle value is the same as the mean.

To illustrate this, consider a simple example of a symmetric distribution with the following values: 125, 130, 135, 140. The mean of this distribution is (125 + 130 + 135 + 140) / 4 = 132.5. However, the median is the middle value of the data set, which is 130. Since the distribution is symmetric, the middle value is the same as the mean.

Therefore, in a symmetric distribution, the value that could be the median of the distribution must be equal to the mean.
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Complete question:- If the mean of a symmetrical distribution is 130, which of these values could be the median of the distribution?

Answer:

60:61.8 OR 10:10.3

Step-by-step explanation:

Cant be simplified - unless your in advanced classes. If so

10:10.3

Answer:

Step-by-step explanation:

1/3 or 0.3 or 33.333333% or 3^-1 or 3.333333 x 10^-1

In the given circle the diameter is fοund tο be line segment BQ passing thrοugh centre O.

A circle is a clοsed, twο-dimensiοnal οbject where every pοint in the plane is equally spaced frοm a central pοint. The line οf reflectiοn symmetry is fοrmed by all lines that traverse the circle. Additiοnally, every angle has rοtatiοnal symmetry arοund the centre.

A circle is given with centre marked as O.

A circle is a 2D fοrm in geοmetry in which all οf the pοints οn its surface are equally spaced frοm its center.

The radius is the length frοm any pοint οn the surface tο the center.

A diameter is a chοrd that is equidistance frοm centre οf the circle.

Here οnly the straight line is equidistance frοm centre οf the circle.

That line is BQ.

Thus, In the given circle the diameter is fοund tο be line segment BQ passing thrοugh centre O.

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The two square roots of 5 (cos(120°) + i sin(120°)) are sqrt(5) × (cos(60°) + i sin(60°)) and sqrt(5) × (cos(300°) + i sin(300°)).

The complex number in question is the square root of 5, written in trigonometric form as cos(120°) + i sin(120°). To calculate the two individual roots, we can use the identity for the square root of a complex number, which states that for any complex number, z, the square root of z is equal to (sqrt(|z|)) × (cos(θ/2) + i sin(θ/2)), where θ is the argument of z. In this case, we have |z| = 5 and θ = 120°. Therefore, the two individual roots are equal to (sqrt(5)) × (cos(60°) + i sin(60°)) and -(sqrt(5)) × (cos(60°) + i sin(60°)) = sqrt(5) × (cos(300°) + i sin(300°)).

In conclusion, the two square roots of 5 (cos(120°) + i sin(120°)) are sqrt(5) × (cos(60°) + i sin(60°)) and sqrt(5) × (cos(300°) + i sin(300°)).

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We may conclude after answering the presented question that None of the given quotient equations are true.

What is an equation?

A formula is a statement that two expressions are equal. An equation consists of two sides separated by an algebraic equation (=).  

For example, the argument "2x + 3 = 9" asserts that the phrase "2x Plus 3" equals the number "9."

The purpose of equation solving is to determine the value or values of the variable(s) that will allow the equation to be true. Equations can be simple or complicated, regular or nonlinear, and include one or more elements.

[tex]x^2 + 2x - 3 = 0.[/tex] Lines are utilized in many different areas of mathematics, such as algebra, calculus, and geometry.

None of the given quotients are true.

A. 1/2 ÷ 2 = 1/4, not 4.

B. 1/3 ÷ 4 = 1/12, not 4/3.

C. 1/2 ÷ 6 = 1/12, not 1/6.

D. 1/5 ÷ 2 = 1/10, not 10.

E. 1/8 ÷ 3 = 1/24, not 1/3.

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The height of the trapezoid is approximately 7 feet.

What is the area of a trapezoid?

To find the height of the trapezoid, we can use the formula for the area of a trapezoid: A = ((b1 + b2) / 2) * h

where A is the area, b1 and b2 are the lengths of the two parallel bases, and h is the height.

We are given that the area is 24.5 ft², and the lengths of the bases are 3 ft and 4 ft. Substituting these values into the formula, we get:

24.5 = ((3 + 4) / 2) * h

Simplifying:

24.5 = 3.5 * h

h = 24.5 / 3.5

h ≈ 7

Therefore, the height of the trapezoid is approximately 7 feet.

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Answer:

1935.2 ft

Step-by-step explanation:

Picture a right triangle with distance from tower to the bus (x)  as the base, and height of the tower 986 ft as the height (y).  Find distance from tower to bus using tan27 = y/x =986/x.  Solve for x:

x = 986/tan27 = 1935.2 ft

(a) The p-value = 0.017 (b)  the conditions are met to conduct the test. (c) the correct conclusion is: Reject the null hypothesis

(a) Using the given data, we can calculate the test statistic z-score as:

z = (xbar - μ) / (σ / sqrt(n))

= (1138 - 1000) / (605 / sqrt(42))

= 2.378

Using StatCrunch, the p-value for a two-tailed test with a test statistic of 2.378 and degrees of freedom of 41 (n - 1) is 0.017.

Therefore, the p-value = 0.017 (to 3 decimal places).

(b) To conduct a hypothesis test for a population mean, we need to check if the following conditions are met:

The population is approximately normal or the sample size is large (n ≥ 30).

The population standard deviation (σ) is unknown.

Here, n = 42 which is greater than 30, so we can assume that the population is approximately normal. The standard deviation of the population is unknown.

Therefore, the conditions are met to conduct the test.

(c) The null and alternative hypotheses are:

Null hypothesis (H0): The mean wastewater discharged by the industrial plant is 1000 gallons per hour (μ = 1000).

Alternative hypothesis (Ha): The mean wastewater discharged by the industrial plant exceeds 1000 gallons per hour (μ > 1000).

At alpha = 0.05 (5% level of significance), the critical z-value for a one-tailed test is 1.645.

Since the calculated z-score (2.378) is greater than the critical value (1.645), we reject the null hypothesis.

Therefore, the correct conclusion is: Reject the null hypothesis. There is sufficient evidence that the wastewater discharged by the industrial plant exceeds 1000 gallons per hour.

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Therefore , the solution of the given problem of unitary method comes out to be P = 1/72.

The objective can be accomplished by utilizing what has been expression learned thus far, making use of this global availability, and incorporating all essential components from earlier changeable study that utilized a particular method. If the anticipated claim result actually occurs, it will be feasible to contact the entity once more; otherwise, both important processes will undoubtedly miss the statement.

Here,

There are two situations to take into consideration because there are seven courses in Group A and six courses in Group B:

The student in Case 1 selects two classes from Group A. The student has seven choices for the first course in this situation, and six options for the second course.

Case 2: The student has a total of 5 choices for courses, as follows:

=>2 × (42 + 30) = 144

As a result, the student has 144 choices for 5-course sequences.

b. There are two choices for the fifth course because the student can select one more course from either Group A or Group B.

There are a total of three methods to select this set of courses:

=> 1 × 1 × 1 × 1 × 2 = 2

the likelihood of selecting Introduction

=>  P = 2/144 = 1/72

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Explanation:

She scored 92 points in 4 games. The unit rate is 92/4 = 23 points per game.

Over the course of 17 games, Maria would have a total of 17*23 = 391 points assuming her scoring rate is kept the same.

The differentiation of the variable y is equal to  [tex]\frac{1}{2} ( \frac{y^{2}-4x^{3}-4xy^{2} }{2x^{2} y+2y^{3}-xy } )[/tex]  for the differential equation.

Given equation: [tex](x^{2} +y^{2} )^{2} = 2xy^{2}[/tex]

differentiate with respect to x

2 [tex](x^{2} + y^{2})[/tex] [ [tex]2x+2y.\frac{dy}{dx}[/tex] ] =[ (1).[tex]y^{2}[/tex] + [tex]x (2y) + \frac{dy}{dx}[/tex] ]

4 [tex](x^{2} + y^{2})[/tex] [ [tex]x+y \frac{dy}{dx}[/tex] ] = [tex]y^{2}[/tex] + [tex]2xy \frac{dy}{dx}[/tex]

4( [tex]x^{3} + x^{2} y \frac{dy}{dx} + xy^{2} + y^{3} \frac{dy}{dx}[/tex] ) = [tex]y^{2}[/tex] + [tex]2xy \frac{dy}{dx}[/tex]

[tex]4x^{3} +4 x^{2} y \frac{dy}{dx} +4 xy^{2} +4 y^{3} \frac{dy}{dx}[/tex] = [tex]y^{2}[/tex] +  [tex]2xy \frac{dy}{dx}[/tex]

[tex]4x^{2}y \frac{dy}{dx}[/tex] + [tex]4y^{3}[/tex] [tex]\frac{dy}{dx}[/tex] - [tex]2xy\frac{dy}{dx}[/tex] = [tex]y^{2} - 4x^{3} - 4xy^{2}[/tex]

[tex](4x^{2}y + 4y^{3} - 2xy )[/tex]  [tex]\frac{dy}{dx}[/tex] =  [tex]y^{2} - 4x^{3} - 4xy^{2}[/tex]

[tex]\frac{dy}{dx}[/tex]  = [tex]y^{2} - 4x^{3} - 4xy^{2}[/tex] / [tex](4x^{2}y + 4y^{3} - 2xy )[/tex]

[tex]\frac{dy}{dx}[/tex] = [tex]\frac{1}{2} ( \frac{y^{2}-4x^{3}-4xy^{2} }{2x^{2} y+2y^{3}-xy } )[/tex]

Hence solved. The differentiation for the given differential equation is done using the technique of implicit differentiation. The differentiation of the variable y is equal to  [tex]\frac{1}{2} ( \frac{y^{2}-4x^{3}-4xy^{2} }{2x^{2} y+2y^{3}-xy } )[/tex]  for the differential equation.

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Step-by-step explanation:

there is something severely wrong with the problem definition.

when the Hypotenuse = 9, there is no 30-60-90 triangle with a leg = 6.

and when we are just focusing that this is a right-angled triangle with the Hypotenuse = 9, then 6 cannot be the longer leg.

it is also not clear what the solution is supposed to be. the 2nd leg ? the area ? the perimeter ? the height(s) ? ...

what ?

so, all I can do here is to show you why I said what I said :

30-60-90 triangle with Hypotenuse = 9

then the longer leg is opposite of the 60° angle and therefore sin(60)×9 = 7.794228634...

the shorter leg is opposite of the 30° angle and therefore sin(30)×9 = 0.5×9 = 4.5

a right-angled triangle with Hypotenuse = 9, one leg = 6 gives us per Pythagoras for the other leg

9² = 6² + leg²

81 = 36 + leg²

45 = leg²

leg = sqrt(45) = 6.708203932...

so, you see, as stated above, there is no leg with the length 6 in such a 30-60-90 triangle.

and in a more general right-angled triangle, if one leg = 6, then the other leg is actually longer.

therefore, there is everything wrong with the problem definition.

The angle made by one chord and tangent of the circle is 32.5 degrees.

What is the Alternate Segment Theorem?

The Alternate Segment Theorem is a theorem in geometry that relates the angles formed by a line that is tangent to a circle and a chord of that circle. The theorem states that the angle formed by a tangent and a chord of a circle is equal to the angle that is subtended by the chord in the opposite segment of the circle

In a circle, the angle formed by a chord and a tangent that intersect at a point on the circle is equal to half the measure of the arc intercepted by the chord.

Therefore, if the arc intercepted by the chord is 65 degrees, then the angle formed by the chord and the tangent is half of 65 degrees, which is:

65 degrees / 2 = 32.5 degrees

So, the angle X made by the chord and the tangent is 32.5 degrees.

Therefore, the angle made by one chord and tangent of the circle is 32.5 degrees.

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[tex]x^{0}[/tex] has a value of [tex]27.5[/tex] degrees.

Values are the benchmarks or ideals by which we judge the acts, traits, possessions, or circumstances of others. Values that are embraced by many include those of beauty, honesty, fairness, harmony, and charity. When considering values, it might be helpful to categorise them into one of three categories: Personal values are those that an individual upholds.

Values come in two varieties. They serve as either terminal or auxiliary values for Rokeach. Terminal values always are end-states whereas qualities are always forms of conduct. Individuals think that acting in line with cognitive factors and reaching terminal values are always related.

We find the value of [tex]x^{0}[/tex]

[tex]Angle P = 1/2 (mAC-AB)[/tex]

[tex]x^{0}=\frac{1}{2} (120^{0}- 65^{0} )[/tex]

[tex]x^{0} =\frac{1}{2}*55^{0}[/tex]

Therefore, [tex]x^{0}= 27.5^{0}[/tex]

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hi :) i sense that it's the rhombus again, but please let me know if i'm wrong.

assuming this is about the rhombus, which i've attached below, here is your answer:

the diagonals of a rhombus bisect each other at right angles. this means that the angles created by the intersection of AC and BD are all equal to 90 degrees, including CEB.

hope this helps!

Answer:

660

Step-by-step explanation:

(10 x 6) x 6 = 360

and

_ x (2 x 6) = _ x 12

To find the missing value, we need to use the distributive property of multiplication, which states that a(b + c) = ab + ac.

Therefore, we can rewrite the right-hand side of the equation as:

_ x (2 x 6) = _ x 12

_ x 12 = 12_

Now we can substitute this into the original equation:

(10 x 6) x 6 = 360

60 x 6 = 360

360 = 360

So, the missing value is 60.

Therefore,

(10 x 6) x 6 = 360 = 60 x 12 = _ x (2 x 6)

and

_ x (2 x 6) = 60 x 12.

Answer:

Step-by-step explanation:

Assuming that the interest is compounded monthly, Ben's total amount owed to the bank after 12 months can be calculated using the following formula:

A = P*(1+r/n)^(n*t)

Where:

P = principal amount borrowed = $10,000

r = annual interest rate as a decimal = 0.12

n = number of times the interest is compounded per year = 12 (monthly)

t = time period for which the interest is applied in years = 1

Plugging in the values, we get:

A = 10,000*(1+0.12/12)^(12*1)

A = $11,268.70

Therefore, Ben owes the bank a total of $11,268.70 after 12 months.

The total price of the vehicle would be $18,192.88.

The total deferred price of the car would be $11,191.60.

The length of the financing agreement is 68 months .

The total deferred price after the payments was $19,601.84.

The monthly payments would be $516.92.

Subtotal = Base price + Options + Destination charges

Subtotal = $14,500 + $982 + $592 = $16,074

Dealer preparation = 5% of subtotal

Dealer preparation = 0.05 x $16,074 = $803.70

Sales tax = 7% of subtotal

Sales tax = 0.07 x $16,074 = $1,125.18

Total price = Subtotal + Dealer preparation + Sales tax + Tag fee + Title fee

Total price = $16,074 + $803.70 + $1,125.18 + $145 + $45 = $18,192.88

Tax = 8% of selling price = 0.08 x $8,850 = $708

Tag fee = $130

Title fee = $35

Total amount financed = Amount financed + Tax + Tag fee + Title fee = $7,350 + $708 + $130 + $35 = $8,223

Annual interest rate = 9.5%

Number of years financed = 3

Total finance charges = $8,223 x 0.095 x 3 = $2,341.595

Total financed amount = $8,223 + $2,341.595 = $10,564.595

Monthly payments = Total financed amount / (Number of years financed x 12 months) = $10,564.595 / (3 x 12) = $293.4615

Total deferred price = Selling price + Total finance charges = $8,850 + $2,341.595 = $11,191.595

Total deferred price = $28,000

Down payment = $2,100

Total amount financed = Total deferred price - Down payment = $28,000 - $2,100 = $25,900

Monthly payments = $380

Number of months = Total amount financed / Monthly payments = $25,900 / $380 = 68.16

The financing agreement is approximately 68 months long.

Sticker price = $19,200

Discount = 6% of sticker price = 0.06 x $19,200 = $1,152

Selling price = Sticker price - Discount = $19,200 - $1,152 = $18,048

Sales tax = 8% of selling price = 0.08 x $18,048 = $1,443.84

Total price = Selling price + Sales tax + Tag fee + Title fee = $18,048 + $1,443.84 + $65 + $45 = $19,601.84

Using the formula for monthly payments on a loan:

P = (PV x r x (1 + r)^ n) / ((1 + r) ^ n - 1)

= ($26,515.80 x 0.005265 x (1 + 0.005265) ^ 60 ) / ((1 + 0.005265) ^ 60 - 1) = $516.92

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There were more color ink cartridges than black ink cartridges sold last week. Therefore, option B is the correct conclusion.

A system of equations, sometimes referred to as an equation system or a set of simultaneous equations, is a finite set of equations for which we searched for common solutions. Variables are related to one another specifically in each equation in a system of equations. To discover a set of variable values that satisfy each equation, the equations can be solved simultaneously.

In everyday situations where the unknown values can be represented as variables, a system of linear equations is used to model the problem. Many techniques, including substitution, elimination, graphing, etc., are used to solve systems of equations.

Let us suppose the number of color ink cartridges sold = x.

The number of color ink cartridges sold = y.

Thus,

x + y = 27

24.99x + 14.99y = 514.73

Multiplying the first equation by 24.99 and subtracting it from the second equation multiplied by 100, we get:

1499y = 1813

y ≈ 1.21

Substituting y back into the first equation, we get:

x ≈ 25.79

Hence, there were more color ink cartridges than black ink cartridges sold last week. Therefore, option B is the correct conclusion.

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Each portion of pasta is 2/3 pounds.

Prοpοrtiοn or portion, in general, is referred tο as a part, share, οr number cοnsidered in cοmparative relatiοn tο a whοle. Prοpοrtiοn definitiοn says that when twο ratiοs are equivalent, they are in prοpοrtiοn. It is an equatiοn οr statement used tο depict that twο ratiοs οr fractiοns are equal.

To divide 2 2/3 pounds of pasta into fourths, we can first convert the mixed number to an improper fraction:

2 2/3 = (2 x 3 + 2)/3 = 8/3

Then, we can divide 8/3 by 4 to find the amount of pasta in each portion:

8/3 ÷ 4 = (8/3) x (1/4) = 2/3

Therefore, each portion of pasta is 2/3 pounds.

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Answer:

Horizontal Compress of 1/4.

Vertical compress of 1/4 as well.

Step-by-step explanation:

Looking at the graph the big Parallelogram HIJK gets becomes smaller parallelogram H'I'J'K'

I have counted the vertical and horizontal of the graph.

So the dilation is

Horizontal Compress of 1/4.

Vertical compress of 1/4.

The null and the alternative hypothesis for Noel's test are given as follows:

The claim for the test is given as follows:

"There is a significant difference in lifespan for people in the two towns."

At the null hypothesis, we test if the claim is false, that is, if there is not a significant difference in lifespan for people in the two towns, hence:

[tex]\mu_A = \mu_B[/tex]

[tex]\mu_A - \mu_B = 0[/tex]

At the alternative hypothesis, we test if the claim is true, that is, there is a significant difference in lifespan for people in the two towns, hence:

[tex]\mu_A \neq \mu_B[/tex]

[tex]\mu_A - \mu_B \neq 0[/tex]

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Answer:

Step-by-step explanation:

We can solve the equation m + 9 = 27 by subtracting 9 from both sides to isolate m:

m + 9 - 9 = 27 - 9

m = 18

Therefore, Ibrain biked 18 miles last week.