Please help I’m confused

The area of a circle is 157 square units and the circumference of a circle is 31.4√2 units.

From the given figure, legs of triangle measure the same, that is 10 units.

Let the diameter of the circle be x.

By using Pythagoras theorem,

x²=10²+10²

x²=100+100

x²=200

x=10√2 units

Radius = 5√2 units

We know that, area of a circle = πr²

= 3.14×(5√2)²

= 3.14×50

= 157 square units

We know that, circumference of a circle = 2πr

= 2×3.14×5√2

= 31.4√2 units

Therefore, the area of a circle is 157 square units and the circumference of a circle is 31.4√2 units.

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Step-by-step explanation:

x y^3 z^2      =   x^1  y^3  z^2  

                           the x   exponent is '1'

The measures are given as follows:

On a parallelogram, the opposite sides are congruent, hence the value of x is obtained as follows:

2x = 4

x = 2.

Opposite angles are congruent, meaning that they have the same measure, hence the measure of angle A is given as follows:

m < A = m < C = 110º.

Consecutive angles are supplementary, meaning that the sum of their measures is of 180º, hence the measure of angle B is given as follows:

m<B = 180º - 110º = 70º.

Considering the angle addition postulate, the measure of angle ABD is given as follows:

m < ABD = 70 - 36

m < ABD = 34º.

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Answer:

60°

Step-by-step explanation:

180-78-42=60

Answer:

5/12

Step-by-step explanation:

add 12 y to both sides:

5x = 24 + 12y

subtract 24 from both sides:

12y = 5x - 24

divide all by 12:

y = (5/12)x - 2.

slope is the number in front of x.

slope is (5/12).

H contains the identity element, is closed under multiplication, and is closed under taking inverses, H is a subgroup of G, as desired.

Let [tex]\mathcal{H}[/tex]  be a non-empty directed family of subgroups of a group G. We need to show that the union [tex]H=\bigcup_{H_i\in\mathcal{H}}H_i[/tex] is a subgroup of G.

First, note that H is non-empty since[tex]\mathcal{H}[/tex] is non-empty. We also have [tex]1_G \in H_i[/tex] for all [tex]H_i\in\mathcal{H}[/tex], so [tex]1_G \in H.[/tex]

To show that H is closed under multiplication, let [tex]h_1,h_2\in H[/tex]. Then there exist [tex]H_{i_1},H_{i_2}\in\mathcal{H}[/tex] such that [tex]h_1\in H_{i_1}[/tex] and [tex]h_2\in H_{i_2}.[/tex] Since [tex]\mathcal{H}[/tex] is directed, there exists[tex]H_{i_3}\in\mathcal{H}[/tex] such that [tex]H_{i_1}\cup H_{i_2} \subseteq H_{i_3}[/tex]. Thus, [tex]h_1,h_2\in H_{i_3},[/tex]and since [tex]H_{i_3}[/tex] is a subgroup, we have [tex]h_1h_2\in H_{i_3} \subseteq H[/tex]. Therefore, H is closed under multiplication.

Finally, to show that H is closed under taking inverses, let h\in H. Then there exists [tex]H_i\in\mathcal{H}[/tex] such that [tex]h\in H_i[/tex]. Since [tex]H_i[/tex]is a subgroup, we have [tex]h^{-1}\in H_i \subseteq H[/tex]. Therefore, H is closed under taking inverses.

Since H contains the identity element, is closed under multiplication, and is closed under taking inverses, H is a subgroup of G, as desired.

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After considering the given data we conclude that the perimeter of the given swimming pool is 23 meters which is Option A.

The perimeter of a rectangle is evaluated by adding up all its sides. For the given case, we possess a rectangle with sides
a = 5m,
b = 8m,
c = 8m and
d = 2m.
Perimeter regarding the swimming pool is evaluated as
a + b + c + d
= 5m + 8m + 8m + 2m
= 23 meters
Hence the option regarding the question which satisfy the perimeter is Option A.
Perimeter the counted  measurement regarding the distance around the outside of a two-dimensional shape. In this system  the length of the outline or boundary of any two-dimensional geometric shape is defined as perimeter .
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The complete question is
If a = 5m, b = 8 m, c = 8 m, and d = 2 m, what is the perimeter of the swimming pool?
A.23 m
B. 32 m
C.29 m
D.34 m

a. The average rate of change for the temperature from 0 minutes to 20 minutes is 2.2.

b. The average rate of change for the temperature from 30 minutes to 60 minutes is 2.7.

In Mathematics, the average rate of change of f(x) on a closed interval [a, b] is given by this mathematical expression:

Average rate of change = [f(b) - f(a)]/(b - a)

Next, we would determine the average rate of change of the function g(t) over the interval [0, 20]:

a = 20; f(a) = 140.3

b = 0; f(b) = 184.3

By substituting the given parameters into the average rate of change formula, we have the following;

Average rate of change = (184.3 - 140.3)/(20 - 0)

Average rate of change = 44/20

Average rate of change = 2.2

Part b.

a = 30; f(a) = 109.3

b = 60; f(b) = 28.3

By substituting the given parameters into the average rate of change formula, we have the following;

Average rate of change = (109.3 - 28.3)/(60 - 30)

Average rate of change = 81/30

Average rate of change = 2.7

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Step-by-step explanation:

The way you can think about volume is that we have some cross sectional area times the height of the solid.

27.

The volume of a square based pyramid is

[tex]v = {s}^{2} ( \frac{h}{3} )[/tex]

where h is the height of the pyramid

s is the side length of the square base.

S=7

h=12

[tex]v = {7}^{2} ( \frac{12}{3} ) = 49 \times 4 = 196[/tex]

28. The volume of a rectangular prism

[tex]v = l \times w \times h[/tex]

where l is length

w is width

h is height

[tex]v = 11 \times 11 \times 8 = 968[/tex]

29.

Use the same formula in 27

[tex]v = 100(3) = 300[/tex]

30.

Volume of a Cylinder is

[tex]v = \pi {r}^{2} h[/tex]

where r is the radius of the circle

where h is the height

r is half of the diameter

The diameter is 22, thus the radius is 11.

[tex]v = {11}^{2} (8)(\pi)[/tex]

[tex]v = 968\pi[/tex]

pi is approximately 3.14

[tex]v = 3041.06[/tex]

31. Volume of A Sphere

[tex] \frac{4}{3} \pi {r}^{3} = v[/tex]

The radius is half of diamter, thus r=7

[tex] \frac{4}{3} \pi( {7}^{3} ) = 1436.76[/tex]

There will be about 21 cm³ of empty space in the cylindrical container.

The formula for the volume of a sphere is V = (4/3)πr³ where r is the radius of the sphere. Since the diameter of each bouncy ball is 3 cm, the radius is 1.5 cm.

V = (4/3)π(1.5)³

= 14.13 cm³

The volume of three bouncy balls is 3 times this amount:

= 3 × 14.13

= 42.39 cm³

Since the diameter of each cylinder is 3 cm, the radius is 1.5 cm. We also know that the height of the cylinder is 9 cm, since each cylinder is 3 cm tall and there are three cylinders stacked on top of each other.

= π(1.5)^2(9)

= 63.62 cm³

Empty space = Vcontainer - Vtotal

= 63.62 - 42.39

= 21.23 cm³

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The area under the curve over [0, 1] is 15.75.

To find the Riemann sum, divide [0, 1] into n equal subintervals of width Δx = 1/n.

Using the right endpoint, c = iΔx = i/n. The Riemann sum is:

Σ[f(c)Δx] = Σ[(21(i/n) + 21(i/n)³)(1/n)] from i=1 to n.

To find the area under the curve, take the limit as n→∞:

Area = lim(n→∞) Σ[(21(i/n) + 21(i/n)³)(1/n)].

Find the answer by using the method of definite integration.

Area = ∫(21x + 21x³)dx from 0 to 1 = [10.5x² + 5.25x⁴] from 0 to 1 = 10.5(1)² + 5.25(1)⁴ - 0 = 15.75.

The area under the curve over [0, 1] is 15.75.

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The area of the triangle is given as follows:

17 cm².

The area of a rectangle of base b and height h is given by half the multiplication of dimensions, as follows:

A = 0.5bh.

Considering the image presented for this problem, the dimensions for the triangle are given as follows:

b = 5 cm, h = 6.8 cm.

Applying the multiplication of these dimensions, the area of the triangle is given as follows:

A = 0.5 x 5 x 6.8

A = 17 cm².

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Answer:

[-infinity, 4]

Step-by-step explanation:

-9x + 3 >= -33
-9x >= -36

x<=4 (sign switched because of dividing both sides by a negative integer in an inequality)
Therefore, x is less than or equal to 4

[ - infinity, 4]

The option that is not equivalent to x ¹⁸ is D. x ¹⁹

As a means to simplify option 1, we can incorporate the rule of multiplying two powers with an identical base to add their exponents. For instance, by doing x³ × x¹⁵ , we would end up with x¹⁸, which ultimately leads to x ¹⁸ as an equivalent result.

By applying the understood concept that when raising a power to itself,exponents must be multiplied together, option 2 becomes more understandable. Specifically, (x ² ) ⁹ = x ¹⁸,the same equivalence as x¹⁸.

Similarly, option 3 assimilates this approach; (x ⁶ ) ³ = x¹⁸,leading to x¹⁸ once again as an equal resonance.

In contrast, option 4, i.e., x¹⁹, comprises an exponent one higher than x¹⁸ and thus, is dissimilarly unequal in comparison.

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Options for this question are:

x³ × x¹⁵

(x²)⁹

(x⁶)³

x¹⁹

Seattle's sales were approximately 33.33% larger than Portland's.

Portland's sales were approximately 25% smaller than Seattle's.

Portland's sales were approximately 75% of Seattle's sales.

We have,

a)

Seattle's sales were larger than Portland's by:

= (380,000 - 285,000)

= $95,000.

To calculate the percentage difference, we can use the formula:

Percentage difference = (Difference / Original value) x 100

Percentage difference = (95,000 / 285,000) * 100 ≈ 33.33%

b)

Portland's sales were smaller than Seattle's by (380,000 - 285,000) = $95,000.

To calculate the percentage difference, we can use the formula:

Percentage difference = (Difference / Original value) x 100

Percentage difference = (95,000 / 380,000) x 100 ≈ 25%

c)

Portland's sales were a certain percentage of Seattle's sales.

To calculate this percentage, we can use the formula:

Percentage = (Portland sales / Seattle sales) * 100

Percentage = (285,000 / 380,000) * 100 ≈ 75%

Therefore,

Seattle's sales were approximately 33.33% larger than Portland's.

Portland's sales were approximately 25% smaller than Seattle's.

Portland's sales were approximately 75% of Seattle's sales.

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(a) The distribution of X is X ~ N(130, 49)

(b) The probability that the average number of friends is less than 135 is 0.610

(c) The first quartile for the average number of friends is 96.925

(d) The assumption of normal distribution is necessary

Given that

Mean = 130

Standard deviation = 49

The distribution of X is represented as

X ~ N(Mean , Standard deviation)

So, we have

X ~ N(130, 49)

The z-score is calculated as

z = (x - Mean)/Standard deviation

So, we have

z = (135 - 130)/18

Evaluate

z = 0.278

So, we have

P = P(z < 0.278)

Evaluate

P = 0.60949

Approximate

P = 0.610

This is calculated as

Q₁ = Mean - 0.675 * Standard deviation

So, we have

Q₁ = 130 - 0.675 * 49

Evaluate

Q₁ = 96.925

Hence, the first quartile for the average friends for this sample size is 96.925

Yes, the assumption is necessary

This is because

The distribution has a sample size greater than 25 as required by the central limit theorem

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a) The null hypothesis: H0: μ >= 1000

alternate hypothesis Ha: μ < 1000

b) The value of the test statistic is -3.12.

a) The null hypothesis, denoted by H0, is a statement of no difference or no effect. The alternate hypothesis, denoted by Ha, is a statement of a difference or effect that we want to test.

In this case, the null hypothesis would be that the average bulb life is greater than or equal to 1000 hours:

H0: μ >= 1000

The alternate hypothesis would be that the average bulb life is less than 1000 hours:

Ha: μ < 1000

where μ is the population mean bulb life.

b) To calculate the test statistic, we need to use the formula:

t = (x - μ) / (s / √(n))

where x is the sample mean, μ is the hypothesized population mean (under the null hypothesis), s is the sample standard deviation, and n is the sample size.

Substituting the given values, we get:

t = (950 - 1000) / (160 / √(30))

t = -3.12

Therefore, the value of the test statistic is -3.12.

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Answer:

113.1 in²

Step-by-step explanation:

A = 2πrh + 2πr²

r = 2 in

h = 7 in

A = 2π(2)(7) + 2π2² = 113.1 in²

The rectangle with points (0, 0), (0, 1), (2, 0), and (2, 1) could be the result of dilating the given rectangle with a scale factor between 0 and 1.

Option B is the correct answer.

We have,

Dilation is a transformation that changes the size of an object.

When a figure is dilated with a scale factor between 0 and 1, the resulting figure is smaller than the original.

The scale factor indicates how much smaller the image is compared to the original.

For example, a scale factor of 0.5 would mean that the image is half the size of the original.

Now,

The rectangle with points (0, 0), (0, 1), (2, 0), and (2, 1) could be the result of dilating the given rectangle with a scale factor between 0 and 1.

This is because the side lengths of the second rectangle are half of the side lengths of the first rectangle, which means that the second rectangle is a dilation of the first rectangle with a scale factor of 0.5.

Thus,

The rectangle with points (0, 0), (0, 1), (2, 0), and (2, 1) could be the result of dilating the given rectangle with a scale factor between 0 and 1.

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so first I would move -6x to the other side and -2 at the same time it would look like this

24+2=6x+7x

and simplify

26= 13x

divide both sides by 13 to find x

2= x

The additional tax (liability) that Lynn owes after her employer withheld $3,150 from her pay is D. $399.

Tax liability refers to the amount that a taxpayer owes.

We can determine the tax liability as the difference between the total tax and the employer-withheld tax.

The total tax is computed by applying the rate to the taxable income, which is the difference between the total income and the total deductions.

Lynn's total income last year = $38,900

Total deductions = $11,450

Employer withheld taxes = $3,150

Taxable income = $27,450 ($38,900 - $11,450)

From the tax table, when taxable income is at least $27,450 but less than $27,500, the total tax is $3,549, based on being a head of household.

The tax liability = $399 ($3,549 - $3,150)

Thus, Lynn is expected to remit an additional $399 to settle her tax liability.

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The perimeter of the field is 4x + 6/(x + 1)(x - 1).

Given that a field has a width of 5/x²-1 and the length is 2/x+1,

We need to find the perimeter,

A field is basically a rectangle, so to find the perimeter of our field we are using the formula for the perimeter of a rectangle,

Perimeter of a rectangle = 2(l+w)

= 2(5/x²-1+2/x+1)

= 2((2(x-1)+5)/(x + 1)(x - 1)

= 4x + 6/(x + 1)(x - 1)

Hence the perimeter of the field is 4x + 6/(x + 1)(x - 1).

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$1356.52 is the cost price of the article.

To find the cost price of the article, we can utilize the concept of calculating the original amount based on a percentage increase.

Let's assume the cost price of the article is "x" dollars.

The trader gained a 15% interest, which means the selling price is 115% of the cost price. In other words, the selling price is 115% of "x".

To calculate the selling price, we can set up the following equation:

115% of x = 1560

To convert the percentage to a decimal, we divide it by 100:

1.15 * x = 1560

Now we can solve for x by dividing both sides of the equation by 1.15:

x = 1560 / 1.15

Using a calculator, we find:

x ≈ 1356.52

Therefore, the approximate cost price of the article is $1356.52.

This means that the trader purchased the article for around $1356.52 and then sold it for $1560.00, resulting in a 15% gain.

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Answer:

The estimated probability that exactly two of the three guests randomly picked were not there for personal reasons is 0.25.

The estimated probability that it takes at least four guests to find one who is staying for personal reasons is 0.125.

The magnitude of the complex number -10 + 24i is 26.

We have,

Complex numbers can be represented as a combination of a real number and an imaginary number, in the form a + bi, where a and b are real numbers and i is the imaginary unit, which is defined as the square root of -1.

Now,

To find the magnitude of a complex number, we take the square root of the sum of the squares of its real and imaginary parts.

For -10 + 24i, the real part is -10 and the imaginary part is 24.

So the magnitude:

| -10 + 24i | = √((-10)^2 + (24)^2) = √(100 + 576) = √676 = 26

Therefore,

The magnitude of -10 + 24i is 26.

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The measures of NP and AP equals 8

First, it is important to note that;

From the information given, we have that;

The centroid of the triangle divides AN in the ratio of 1: 2

Hence, the length of AN is twice that of line NP

So;

AN = 2NP

Substitute the value

18 = 2NP

Divide by the coefficient

NP = 9

But;

AN = NP + AP

Substitute the values, we get;

AP = 18 - 9

AP = 9

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Answer:

-0.5. is 5

Step-by-step explanation:

i need the poits