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Part 1: If Mary doubles the area of her original square garden, the expression that represents the area of Mary's new garden is 2x^2.

Part 2: If the side length of Mary's original garden is 9 feet, the area of Mary's new garden is 162 square feet.

Part 1: If Mary doubles the area of her original square garden, the new area of her garden will be 2 times the area of her original garden.

If the area of her original garden is x^2, then the area of her new garden will be:

2(x^2) = 2x^2

So, the expression that represents the area of Mary's new garden is 2x^2.

Part 2: If the side length of Mary's original garden is 9 feet, then the area of her original garden is:

x^2 = (9 feet)^2 = 81 square feet

To find the area of Mary's new garden, we can substitute 81 for x^2 in the expression we found in Part 1:

2x^2 = 2(81 square feet) = 162 square feet

So, the area of Mary's new garden is 162 square feet.

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Answer:

Step-by-step explanation:

Part A:

The actual length of the dining room is 120 inches and the percent error is -5%, which means that Rihana's measurement was too short. To find the length she measured, we need to add 5% to the actual length:

120 inches * (1 + (-5%)/100) = 120 inches * (1 - 0.05) = 120 inches * 0.95 = 114 inches

So Rihana measured the length of her dining room as 114 inches.

Part B:

To find the length that Rihana measured, we used the formula for calculating percent error:

measured length = actual length * (1 + (percent error)/100)

Since the percent error was negative (-5%), this means that Rihana's measurement was too short, so we subtracted the percent error from 100%. To do this, we added the negative percent error to 100%:

100% + (-5%) = 100% - 5% = 95%

So the measured length was 120 inches * 95% = 114 inches.

Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ

The length of the dining room measured by Rihana with a -5%  percent error  is 114 inches.

What is a percent error?

The percent error is the distinction between the estimated value and the actual value in relation to the actual value. In other words, the relative error is multiplied by 100 to calculate the percent error.

A) Given the percent error as -5%.

The actual length = 120inches

Now error in measurement = 5% of 120 inches = 6 inches.

Since there is a negative sign in percent error, the measured value is 6 inches less than actual value.

Therefore the measured value = 120 - 6 = 114 inches.

B) We are given the actual length as 120 inches.

There is a -5% error in the measured value.

This means that the measured value is (5% of 120) inches less than actual value. It is identified as less because of the negative sign.

So the measured value is = 120 - 0.05*120 = 114 inches.

Therefore the length of the dining room measured by Rihana with a -5%  percent error is 114 inches.

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The required Venn diagram is given in the picture.

The graphic representation of the differences and affinity between the two concepts is a Venn diagram.

In order to solve problems based on these sets, we can use a Venn diagram to depict the logical relationship among sets and their contents.

Note: "The set of natural numbers starts from 1, hence '0' is not included in the set of natural numbers."

Here we have

A spinner is split into eight wedges numbered 0-7

The set of numbers = 0, 1, 2, 3, 4, 5, 6 and 7  

The set of numbers that is less than 5 = {0, 1, 2, 3, 4 }

The set of numbers that are natural numbers = {0, 1, 2, 3, 4, 5, 6, 7 }

The set number that natural number and less than 5 = {1, 2, 3, 4 }  

Hence,

The required Venn diagram is given in the picture.

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[ Complet Question is given in picture ]

Answer: To find out what Kelly's next score must be in order to obtain an average that is more than 88, we first need to find the current average of her scores. To do this, we add up her current scores and divide by the number of scores:

(79 + 89 + 86 + 93) / 4 = 337 / 4 = 84.25

Since the current average is 84.25, which is less than 88, Kelly must score higher than 88 on her next quiz to bring the average up to more than 88. To be specific, Kelly must score at least 89 on her next quiz.

Step-by-step explanation:

The M.A.S motion for two different time periods {T} = 2s and

{T} = 2/3s is calculated above.

The general equation is -

y{t} = A sin(ωt + Ф)

Given is a body describes an M.A.S according to the function -

{x} = 2 cos{(π/2)T+ π)r

Now -

For {T} = 2, we can write -

{x} = 2 cos{(π/2) x 2+ π)r

{x} = 2 cos{2π}r

{x} = 2 x 1 x r

{x} = 2r

For {T} = 2/3, we can write -

{x} = 2 cos{(π/2) x 2/3+ π)r

{x} = 2 cos{π/3}r

{x} = 2 x -0.33 x r

{x} = - 0.66r

Therefore, the M.A.S motion for two different time periods {T} = 2s and

{T} = 2/3s is calculated above.

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{Question in english -

a body describes an M.A.S according to what is specified.

x= 2 cos (π/2 T+π) r

Find its elements in:

T= 2

T= 2/3 sec

K=f/x}

Answer:

7.09

Step-by-step explanation:

s = r∅ = 7.09

s = (7 cm)(1.0123) = 7.086

58 deg x π/180 = 1.0123 radians

Answer:

CB ≈ 7.09 cm

Step-by-step explanation:

the length of arc CB is calculated as

AB = circumference of circle × fraction of circle

    = 2πr × [tex]\frac{58}{360}[/tex] ( r is the radius )

   = 2π × 7 × [tex]\frac{29}{180}[/tex]

  = [tex]\frac{14\pi (29)}{180}[/tex]

  ≈ 7.09 cm ( to 2 decimal places )

Answer: The equation of the tangent to a parabolic curve y = ax^2 + bx + c at the point (h, k) can be expressed as:

y = a(x - h)^2 + k

So, we know the equation of the tangent at vertex of the parabolic curve is 3x - 4y = 5, so the vertex of the parabolic curve is (h, k) = (2, -3/2).

The equation of a parabolic curve with vertex (h, k) and focus (h, k + p) is given by:

y = a(x - h)^2 + k, where a = -1/4p.

So, substituting the values of the vertex (2, -3/2) and the focus (1, 2) into the above equation, we have:

-3/2 = a(2 - 2)^2 - 3/2, so a = -1/4p.

And, substituting the values of the focus (1, 2) into the equation y = a(x - h)^2 + k, we have:

2 = -1/4p(1 - 2)^2 - 3/2, so p = 1/2.

So, the equation of the parabolic curve with focus (1, 2) and vertex (2, -3/2) is:

y = -1/4 * 1/2 * (x - 2)^2 - 3/2.

This is the equation of the parabola that has the equation of the tangent at vertex 3x - 4y = 5 and focus at the point (1, 2).

Step-by-step explanation:

Check the picture below.

[tex]~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ Q(\stackrel{x_1}{-2}~,~\stackrel{y_1}{8})\qquad P(\stackrel{x_2}{6}~,~\stackrel{y_2}{2}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ 6 -2}{2}~~~ ,~~~ \cfrac{ 2 +8}{2} \right) \implies \left(\cfrac{ 4 }{2}~~~ ,~~~ \cfrac{ 10 }{2} \right)\implies (2~~,~~5)[/tex]

Answer:

Graph C.

The question asks for the graph that consists of:

Non-negative values

Values that are, at most, 80

This means that any graphs where a value goes below 0 or above 80 do not work. C is the only graph that does not go below 0 or above 80.

Y = -0.0063e0.16x + 99.97 is the exponential regression equation for the data, where x is the time in minutes and y is the temperature of the soup.

Calculate the x and y means in step one.

X's average: (0 + 10) / 2 = 5.

(95 + 88.5) / 2 = 91.75 is the mean of y.

Calculate the variance and covariance in step two.

(-5 6.5) + (5 -2.5) = 32.5 is the covariance.

X's variation is (5 0).

2 + (10 − 0)2 = 125

Calculate the regression coefficients in step three.

x = -32.5 / 125 = -0.26 where a = Covariance / Variance of x

Mean of x = 91.75 (-0.26 5) = 99.97 where b = Mean of y a Mean of x

Step 4: Compose the equation for exponential regression.

y = -0.0063e^0.16x + 99.97

Y = -0.0063e0.16x + 99.97 is the exponential regression equation for the data, where x is the time in minutes and y is the temperature of the soup. We must first determine the means of x and y before we can solve the problem. By summing the first and last values of x and dividing by 2, the mean of x is 5 and the mean of y is 91.75. (calculated by adding the first and last y values and then dividing by 2).

Calculating the covariance and variance comes next. The difference between each x and the mean of x is multiplied with the difference between each y and the mean of y to determine the covariance. By squaring the difference between each x and the mean of x, the variance of x is determined. The regression coefficients a and b can be determined when the covariance and variance have been computed.

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Answer:

the equation: 251+D=468

the answer: 217 miles

Step-by-step explanation:

Samantha drove a total of 468 miles, and she drove 251 miles on the first day. D would represent the distance traveled on the second day. The added distance traveled on both days will equal the total amount driven.

So, our equation will be 251 + D = 468.

To solve the equation,  we can use the inverse operations method in order to isolate D(the variable) To do that, we have to subtract 251 from both sides(both sides so that the equation still has the same value).

D=468-251.

Now we can simplify the equation to:

D=217.

The answer is: 217 miles will be traveled on the second day.

The length of the side c of the right-angled triangle is equal to 6.5 to the nearest tenth using the trigonometric ratio of sine of angle 50°.

The trigonometric ratios is concerned with the relationship of an angle of a right-angled triangle to ratios of two side lengths.

The basic trigonometric ratios includes;

sine, cosine and tangent.

Considering the right-angled triangle ABC, we shall calculate for the length c by application of the trigonometric ratio of sine for the angle 50°.

sin 50° = 5/c {opposite/hypotenuse}

by cross multiplication

c = 5/sin 50°

c = 6.5270

Therefore, the length of the side c of the right-angled triangle is equal to 6.5 to the nearest tenth using the trigonometric ratio of sine of angle 50°.

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Answer:

I don't understand French

Step-by-step explanation:

If lines A, B and C shows proportional relationships, then the line A has a constant of proportionality between y and x is 5

Given the line A, B and C

The constant of proportionality is the ratio of the y coordinates to the x coordinate

k = y /x

Where k is the constant of proportionality

Consider the line A

One point on the line = (1, 5)

Constant of proportionality K = 5/1

= 5

Consider the line B

One point on the line = (3, 5)

Constant of proportionality k = 5/3

Consider the line C

One point on the line = (7, 5)

Constant of proportionality = 5/7

Therefore, the line A has the constant of proportionality of 5

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The given question is incomplete, the complete question is

Lines A, B, and C show proportional relationships. Which line has a constant of proportionality between y and x of 5?

Dinner would cost $123 at either restaurant if Betty's lobster weighed 36 pounds.

The slope-intercept definition of a linear function is given as follows:

y = mx + b.

In which:

In the context of this problem, the slope and the intercept are defined as follows:

Hence the functions for each restaurant are given as follows:

The costs are the same when:

y1(x) = y2(x)

51 + 2x = 15 + 3x

x = 36.

The cost is of:

y = 15 + 3 x 36

y = $123.

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Using the empirical rule, we can conclude that approximately 68% of American women have shoe sizes between 6.54 and 9.58.

Using the empirical rule, we can say that approximately 68% of the data falls within one standard deviation of the mean, approximately 95% of the data falls within two standard deviations of the mean, and approximately 99.7% of the data falls within three standard deviations of the mean.

To find the percentage of American women who have shoe sizes between 6.54 and 9.58, we first need to standardize these values by subtracting the mean and dividing by the standard deviation:

z1 = (6.54 - 8.06) / 1.52 = -1.00

z2 = (9.58 - 8.06) / 1.52 = 1.00

Now, we can use the empirical rule to find the percentage of women with shoe sizes between z = -1.00 and z = 1.00. Since this interval corresponds to one standard deviation from the mean, we know that approximately 68% of the data falls within this range.

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There were 297 children and 185 adults who swam that day. Let x be the number of children and y be the number of adults who swam that day.

According to the problem, we know that:

x + y = 482 ---(1) (total number of people who swam)
1.5x + 2y = 815.5 ---(2) (total revenue generated)

To solve for x and y, we can use any method of solving a system of linear equations, such as substitution or elimination. Here's how to solve using the substitution method:

From equation (1), we can write:

x = 482 - y

Substituting this into equation (2), we get:

1.5(482 - y) + 2y = 815.5

Simplifying and solving for y, we find:

723 - 1.5y + 2y = 815.5

0.5y = 92.5

y = 185

Substituting this value of y back into equation (1), we find:

x + 185 = 482

x = 297

Therefore, there were 297 children and 185 adults who swam that day.

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The diameter of a circle is 10 feet.

The circumference of a circle is the perimeter of the circle. It is the total length of the boundary of the circle. The circumference of a circle is the product of the constant π and the diameter of the circle.

Given that, the circumference of a circle is 31.4 ft.

We know that, circumference of a circle is 2πr

Now, 2πr=31.4

2×3.14×r=31.4

6.28r=31.4

r=31.4/6.28

r=5 feet

Then, diameter=2×radius =10 feet

Therefore, the diameter is 10 feet.

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The percent of increase in price is 20 %

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100. The proportion therefore refers to a component per hundred. Per 100 is what the word percent means. The letter "%" stands for it.

Percentage formula = (Value/Total value) × 100

increase 700 to 840

old price is 700

new price is 840

price increase is  840 - 700

=140

percentage increase in price is

= 140*100/700= 20 percentage

Percentage formula = (Value/Total value) × 100

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Answer:

[tex]\frac{5\sqrt{2} }{2}[/tex]

Step-by-step explanation:

The square cut in half makes the right side a right triangle.

The equation for these types of questions is short side * square root of 2 = long side

So that means that x * [tex]\sqrt{2}[/tex] = 10

So then divide by square root of 2 on both sides to cancel it out

x = 10/[tex]\sqrt{2}[/tex]

Then to simplify it multiply the top and bottom by square root of 2, since you can't have an irrational number in the denominator

That makes it [tex]\frac{10\sqrt{2} }{2}[/tex]

Divide 10/2 to make [tex]\frac{5\sqrt{2} }{2}[/tex]

y=6, x=16

you create a system with the two variables and manipulate an equation so that you can substitute in the other to make it a single-variable equation. you then solve for that variable by isolating it and you can solve for the second variable afterwards. hope this helps!

The number of ways to choose 2 toppings from a menu of 18 toppings is a classic example of a combinatorial problem.

We have a set of 18 items (toppings), and we want to know how many ways there are to choose 2 of these items. The answer is given by the binomial coefficient C(18, 2), which is the number of ways to choose 2 items from a set of 18 items, where order does not matter and repetition is not allowed.

The formula for a binomial coefficient is:

C(n, k) = n! / (k! * (n - k)!)

where n! means n factorial, which is the product of all positive integers from 1 to n. So, for example, 5! = 5 * 4 * 3 * 2 * 1 = 120.

Using this formula, we can calculate the number of ways to choose 2 toppings from a menu of 18 toppings:

C(18, 2) = 18! / (2! * (18 - 2)!) = 18 * 17 / (2 * 1) = 153 ways

So there are 153 different ways to choose 2 toppings from a menu of 18 toppings.

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A sample of at least 870 people is needed to estimate the proportion of people in favor of the political reform in District A with a 97% confidence level and a maximum estimation error of 4.7%

To estimate the sample size, we can use the following formula:

n = (Z^2 * p * (1-p)) / E^2

where:

n = sample size

Z = the Z-score for a given confidence level (for 97% confidence, Z = 2.33)

p = the proportion in the pilot sample (0.641)

E = the maximum allowed error of estimation (0.047)

Plugging in the values, we get:

n = (2.33^2 * 0.641 * (1 - 0.641)) / 0.047^2

n = (5.3929 * 0.359) / 0.00222009

n = 1.928 / 0.00222009

n = 869.75

Since the sample size must be a whole number, we round up to the nearest whole number.

n = 870

Therefore, a sample of at least 870 people is needed to estimate the proportion of people in favor of the political reform in District A with a 97% confidence level and a maximum estimation error of 4.7%

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Answer:

C

Step-by-step explanation:

Plug (5, -2) into the equation

2(5) - (-2) =

10 + 2 =

12

C is the answer

(5, -2) is the answer

Answer:

Step-by-step explanation:

i9 have no idea sorry

The right response is, "5 hexagons are made up of 15 pattern block trapezoids."

Geometric shapes known as pattern block trapezoids are frequently utilized in arithmetic instruction. On a flat surface, they are one of a number of forms that can be used to make tessellations, or repeating patterns. Different colored plastic or foam pattern block trapezoids are available in a variety of sizes, with each color denoting a distinct size and form. Pattern block trapezoids are frequently used to teach geometry principles like area, perimeter, and angles in addition to their application in making tessellations. They can also aid in the development of kids' spatial reasoning and problem-solving skills.  

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The size of angle BCA is 45 degrees

A quadrilateral called a kite has two pairs of sides that are each the same length and are next to one another.

Where the two uneven sides meet, the two angles are equal. It can be thought of as two congruent triangles sharing a base. It has two diagonals that right-angle intersect with one another.

Given:

From the Figure we can see that

AB = BC and AD = DC = AC

and, ABC = 90 degrees

Now, In triangle ABC using Angle sum Property

A + B + C = 180

So,  A + 90 + C = 180

A + C = 90

As, AB = BC

Then, 2C = 90

C = 45

Hence, the angle is 45 degrees

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The Question attached here seems to be incomplete/ inappropriate. The complete Question is:

ABCD is a kite with AB = BC and AD = DC = AC, What is the size of angle  BCA

From power rules, the value of n is 4.

The main power rules are presented below.

For solving this question, you should convert the given text into a math expression. See below.

7^7 multiplied by 7^5 equals (7^n)^4 over 7^4 =  [tex]7^7 * 7^5 =\frac{ (7^n)^4 }{7^4}[/tex]

After that, you should apply the power rules. Using the rule for the multiplication with the same base, you have: [tex]7^{12} =\frac{ (7^n)^4 }{7^4}[/tex].

Next step, you should apply the rule Power, then: [tex]7^{12} =\frac{ (7^{4n})}{7^4}[/tex].  One more time, you should apply the rule for the multiplication with the same base, and you will have:

[tex]7^{12} =\frac{ (7^{4n})}{7^4}\\ \\ 7^{16}=7^{4n}[/tex]

Thus,

16=4n

n=16/4

n=4

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Answer:

you cannot cancel (5-5) because it is multiplied to 5 and 4 if the question was 5+(5-5)=4+(5-5) you can cancel 5-5

The reason that we can't cancel out the (5 - 5) is because it is attached to different numbers and as such they must be multiplied first with distributive property.

According to the distributive property of algebra, multiplying the sum of two or more addends by a number will give us the same result as when each addend is multiplied individually by the number and the products are added together.

This also applies to addition as well.

We are given;

5(5 - 5) = 4(5 - 5)

Now, according to the distributive property, we will have to first multiply out the bracket to get a solution. Thus, we can't cancel out the (5 - 5) because it is attached to different numbers and as such they must be multiplied first with distributive property in mind.

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