Answer: y = 1/3x + 2
Step-by-step explanation:
y = mx+b
to find m: m = 3 - 5 / -3 - (- 9) = -2 / 6 = - 1 / 3
to find b:
3 = -1 / 3 (-3) + b
3 = 1 + b
b = 2
You wish to test the following claim (H_a) at a significance level of alpha = 0.05. H_0: p = 0.14 H_a: p ≠ 0.14 You obtain a sample of size n = 585 in which there are 55 successful observations. For this test, you should NOT use the continuity correction, and you should use the normal distribution as an approximation for the binomial distribution. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... a. less than (or equal to) alpha b. greater than alpha This test statistic leads to a decision to... a. reject the null b. accept the null c. fail to reject the null As such, the final conclusion is that.. a. There is sufficient evidence to warrant rejection of the claim that the population proportion is not equal to 0.14. b. There is not sufficient evidence to warrant rejection of the claim that the population proportion is not equal to 0.14. c. The sample data support the claim that the population proportion is not equal to 0.14. d. There is not sufficient sample evidence to support the claim that the population proportion is not equal to 0.14.
a)1.597
b)0.1101
c)The population proportion is not equal to 0.14
The test statistic for this sample is 1.597. The corresponding p-value is 0.1101. The p-value is greater than alpha, so the decision is to fail to reject the null. As such, the final conclusion is that there is not sufficient evidence to warrant rejection of the claim that the population proportion is not equal to 0.14. This conclusion is based on the Binomial Distribution and Statistic, which use the p-value to assess the evidence against the null hypothesis.
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Please Help! I don't understand.
Answer:
36πmm^2
Step-by-step explanation:
6mm^2=36mm
36mm×π=36πmm^2
Much of Ann's investments are in Cilla Shipping. Ten years ago, Ann bought seven bonds issued by Cilla Shipping, each with a par value of $500. The bonds had a market rate of 95.626. Ann also bought 125 shares of Cilla Shipping stock, which at the time sold for $28.00 per share. Today, Cilla Shipping bonds have a market rate of 106.384, and Cilla Shipping stock sells for $30.65 per share. Which of Ann's investments has increased in value more, and by how much?
Ann's investment in Cilla Shipping bonds has increased in value more, by $33,605.41
What is purchase price?
The complete cost of purchasing an asset is known as the original cost. The whole costs associated with purchasing and using an asset are taken into account when calculating its initial cost.
To determine which of Ann's investments has increased in value more, we need to compare the current value of the bonds and the stock to their original purchase value.
First, let's calculate the purchase price of the bonds:
7 bonds x $500 par value x 0.95626 market rate = $3,349.82
So, Ann initially invested $3,349.82 in the Cilla Shipping bonds.
Next, let's calculate the purchase price of the stock:
125 shares x $28.00 per share = $3,500.00
So, Ann initially invested $3,500.00 in the Cilla Shipping stock.
Now, let's calculate the current value of the bonds:
7 bonds x $500 par value x 1.06384 market rate = $37,286.48
So, the current value of the bonds is $37,286.48.
Let's also calculate the current value of the stock:
125 shares x $30.65 per share = $3,831.25
So, the current value of the stock is $3,831.25.
To determine which investment has increased in value more, we can calculate the percentage increase for each investment:
Percentage increase in bonds = [(current value - purchase price) / purchase price] x 100%
= [(37,286.48 - 3,349.82) / 3,349.82] x 100%
= 1010.46%
Percentage increase in stock = [(current value - purchase price) / purchase price] x 100%
= [(3,831.25 - 3,500.00) / 3,500.00] x 100%
= 9.48%
So, we can see that the bonds have increased in value more than the stock, by a significant amount.
The bonds have increased in value by 1,010.46%, while the stock has increased in value by only 9.48%. The bonds have increased in value by a total of $33,936.66 ($37,286.48 - $3,349.82), while the stock has increased in value by a total of $331.25 ($3,831.25 - $3,500.00).
Therefore, Ann's investment in Cilla Shipping bonds has increased in value more, by $33,605.41 ($33,936.66 - $331.25).
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Use the LCD of the fractions to make your polynomial contain only whole numbers
Polynomial without fractions
x^4+1/2 x^3+7/2 x^2+2x-2
The polynomial without fractions is 2x^4 + x^3 + 7x^2 + 4x - 4.
To make the polynomial contain only whole numbers, we need to find the least common denominator (LCD) of the fractions and multiply each term by the LCD.
The LCD of the fractions 1/2 and 7/2 is 2.
So, we multiply each term by 2 to get rid of the fractions:
2(x^4) + 2(1/2 x^3) + 2(7/2 x^2) + 2(2x) + 2(-2)
Simplifying the terms gives us:
2x^4 + x^3 + 7x^2 + 4x - 4
Therefore, the polynomial without fractions is 2x^4 + x^3 + 7x^2 + 4x - 4.
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use the rule “add 8” to find the cost of 6 T-shirts. Explain how you found your answer.
Use the rule, “add 8” to find the cost of 6 T-shirts. The cost of the T-shirt is $48.
What is addition?One of the four fundamental operations in mathematics is addition, along with subtraction, multiplication, and division.
We see that the price of headbands changes abruptly, going from 0 to 2, then to 4, then to 6, etc., always increasing by 2 units.
The “add 8” rule applies to the price of T-shirts because each one costs $8.
In order to determine the cost of six headbands, we then perform the following calculations:
8 + 8 + 8 + 8 + 8 + 8 = 6 x 8 = $48
We see that we can easily multiply the required quantity of T-shirts by the cost per unit of T-shirts.
Therefore, the cost of the T-shirt is $48.
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The question is incomplete, the complete question is given below:
The school store sells headbands for $2 each and T-shirts for$8 each. Write ordered pairs to compare the cost of headbands to T-shirts for 0,1,2,3,4, and 5 of each item.
Cost of Headbands ($)
0
2
4
6
8
10
Cost of T-shirts ($)
8
16
24
32
40
Ordered Pairs
(0, 0)
(2, 8)
(4, 16)
(6, 24)
(8, 32)
(10, 40)
What is the current through a 2.5 ohm resistor that is connected across a 6.0 V potential difference?
The current thrοugh the 2.5 οhm resistοr is 2.4 A.
What is current?Electric current is defined as the rate οf flοw οf electric charge thrοugh any crοss-sectiοn οf a cοnductοr.
Tο calculate the current thrοugh a 2.5 οhm resistοr cοnnected acrοss a 6.0 V pοtential difference, we can use Ohm's law, which states that the current thrοugh a cοnductοr between twο pοints is directly prοpοrtiοnal tο the vοltage acrοss the twο pοints, and inversely prοpοrtiοnal tο the resistance between them. The mathematical expressiοn fοr Ohm's law is:
V = I x R
where V is the vοltage, I is the current, and R is the resistance.
We can rearrange this fοrmula tο sοlve fοr the current I:
I = V / R
Substituting the given values, we get:
I = 6.0 V / 2.5 οhm
I = 2.4 A
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When 1,250 Superscript three-fourths is written in its simplest radical form, which value remains under the radical?
2
5
6
8
We can represent 1,250 raised to the power of three-fourths as the sum of its prime factors in order to write it in the simplest radical form:
1,250 = 2 × 5 × 5 × 5 × 5
How is radical form determined?Next, we can formulate the statement as follows by using the fact that (a b)c = ac bc:
[tex](2\times5^3)^3/4 = 2^{(3/4)} \times(5^3)^{(3/4)[/tex]
Now, by using the fourth root of 53, we can simplify the statement underneath the radical:
[tex](2\times5^3)^3/4 = 2^{(3/4)} \times5^{(9/4)[/tex]
As a result, the value under the radical is 5(9/4), or the fifth root of five multiplied by nine. 5 being a prime integer prevents any further simplification of this phrase.
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Answer:
5
Step-by-step explanation:
The answer above is correct.
Marshall purchases a duffel bag priced at $20. With sales tax, the total comes out to $20. 95. What is the sales tax percentage?
well, the tax is cleary just 20.95 - 20 = 0.95, so 95 cents, now, if we take 20(origin amount) to be the 100%, what is 0.95 off of it in percentage?
[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 20 & 100\\ 0.95& x \end{array} \implies \cfrac{20}{0.95}~~=~~\cfrac{100}{x} \\\\\\ 20x=95\implies x=\cfrac{95}{20}\implies x=4.75[/tex]
HELP PLS BRAINLIEST AND FIVE STAR IF ALL OF THESE ARE CORRECT
a)√(x^2-14x+49)=x-7
b)√(4x^2-20x+25)=5-2x
C)√(y^4+2y^2+1)=y^2+1
d)√(x^2+2x+1)=x+1
e)√(y^2-20y+100)=y-10
f)√(y^6-2y^3+1)=y^3-1
pls answer all pls pls pls
(also the answer is most likely NOT all real numbers or no solutions)
The solution to the all given equations is that they have infinite many real solutions
How to determine the solution to the equationsEquation (a)
From the question, we have the following parameters that can be used in our computation:
√(x^2-14x+49)=x-7
When both sides of the equations are squared, we have:
x^2 - 14x + 49 = x^2 - 14x + 49
Evaluate the like terms
0 = 0
This represents infinite many solutions
Equation (b)
Here, we have:
√(4x^2-20x+25)=5-2x
When both sides of the equations are squared, we have:
4x^2-20x+25 = 25 - 20x + 4x^2
Evaluate the like terms
0 = 0
This represents infinite many solutions
For the remaining expressions, we have the following (using the above steps)
Equation (c)
√(y^4+2y^2+1) = y^2 + 1
y^4 + 2y^2 + 1 = y^4 + 2y^2 + 1
0 = 0
Equation (d)
√(x^2+2x+1)=x+1
x^2 + 2x + 1 = x^2 + 2x + 1
0 = 0
Equation (e)
√(y^2-20y+100)=y-10
y^2 - 20y + 100 = y^2 - 20y + 100
0 = 0
Equation (f)
√(y^6-2y^3+1)=y^3-1
y^6-2y^3+1 = y^6-2y^3+1
0 = 0
Hence, the equations have infinite solutions
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Find \( A \). \[ (4 A)^{-1}=\left[\begin{array}{ll} 5 & 2 \\ 4 & 2 \end{array}\right] \]
Since the right side of the equation is equal to the identity matrix, we can conclude that the diagonal elements are equal to 1.
To find \( A \), start by multiplying both sides by \( (4A) \). Then, you will have \( (4A)^{-1}(4A)=\left[\begin{array}{ll} 5 & 2 \\ 4 & 2 \end{array}\right] \). This simplifies to \( \left[\begin{array}{ll} 5A & 2A \\ 4A & 2A \end{array}\right] \). Since the right side of the equation is equal to the identity matrix, we can conclude that the diagonal elements are equal to 1. This means that \( 5A=1 \) and \( 2A=1 \). Solving these two equations yields \( A=\frac{1}{5} \).
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find the length of wire required to fence a circular park of diameter 280m with 3 rounds
Step-by-step explanation:
To fence a circular park with 3 rounds, we need to find the total length of wire required to go around the park 3 times.
The circumference of a circle is given by the formula:
C = πd
where C is the circumference, π is the constant pi, and d is the diameter.
Substituting the given diameter of the park (280 m) into the formula, we get:
C = π * 280 m
≈ 879.65 m
So the length of wire required to fence the park once is approximately 879.65 m.
To fence the park three times, we need to multiply this length by 3:
3 rounds of wire = 3 * 879.65 m
= 2638.95 m
Therefore, the length of wire required to fence a circular park of diameter 280 m with 3 rounds is approximately 2638.95 m.
What is the shortest network (of straight lines) connecting a given set of three points? If the three points are collinear, the answer is obvious. If not, then the answer has two parts: Let A,B and C be the three points. Then
(I) If some angle of the triangle ABC is greater than or equal to120 , the shortest network is the path along the two shortest sides of the triangle.
(II) If all angles of triangle ABC are less than 120 degrees, then construct the point S such that the three angles at S made by the lines AS ,BS and CS are equal to one another. The shortest network is the "Y-shaped" structure made up of the segments AS ,BS and CS .
Where is the point S(in relation to the vertices A ,B and C ) in the case where ABC is an equilateral triangle. What is the total length of the network in this case? How much shorter is it (percentage-wise) than the path made up of the shortest two sides?
This is shorter than the path made up of the two shortest sides by 33%.
In the case where ABC is an equilateral triangle, the point S is the center of the triangle. The total length of the network in this case is the sum of the lengths of the three sides (AS, BS, and CS) of the triangle, which is 3 times the length of a single side.
This is shorter than the path made up of the two shortest sides by 33%,
since the total length of the path made up of the two shortest sides is the sum of the lengths of the two sides, which is 2 times the length of a single side.
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a park is 70 meters wide and 110 meters long, give the length and width of another park that has the same perimeter but a larger area
Answer: 80 meters wide and 100 meters long.
Step-by-step explanation:
Well, if the park has to have a larger area, but the same perimeter, all you need to do in this case is turn 70 to 80 and 110 to 100.
80 + 80 + 100 + 100 = 360 meters in perimeter
70 x 110 = 7700
80 x 100 = 8000 ← This has greater area than the park above
what is the decimal multiplier to decrease by 68%?
Answer:
I think it is 0.68. Try that. If not sorry.
A florist sells bouquets containing different flowers.
The ratio of lilies to daffodils to marigolds in a bouquet is 7f:6:2f.
What fraction of the flowers in the bouquet are daffodils?
Give your answer in its simplest form.
The fraction of the flowers in the bouquet are daffodils is 6/ 9f + 6
What is a fraction?A fraction can be defined as the part of a whole number or variable.
The different types of fractions in mathematics are;
Proper fractionsImproper fractionsMixed fractionsSimple fractionsComplex fractionsWhat is ratio?Ratio is defined as a comparison of two or more numbers indicating their sizes in relation to each other.
It shows the number of times one number contains another.
From the information given, we have that;
The ratio of lilies to daffodils to marigolds in a bouquet is 7f:6:2f.
Then, thte number of daffodils would be;
= 6/7f + f+ 2f
= 6/ 9f + 6
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Imagine two cars that are traveling down the highway. The distance (in miles) each car has traveled can be represented using the following polynomials where t is the number of hours that has passed.
Car A: 7t²+50t+150
Car B: 7t²+45t
Part 1)Write a polynomial for the number of miles between the two cars
Part 2)What is the distance between the two cars after 3 hours of traveling on the highway?
Part 3) After how many hours will the distance between the two cars be 200 miles?
The polynomial for the number of miles between the two cars is d(t) = 5t + 150
The distance between the two cars after 3 hours is 165 milesThe time after traveling 200 miles apart is 10 hoursThe polynomial for the number of miles between the two carsGiven that
Car A: 7t²+50t+150
Car B: 7t²+45t
The distance function is represented as
d(t) = 7t²+50t+150 - 7t² - 45t
So, we have
d(t) = 5t + 150
The distance after 3 hoursThis means that t =3
So, we have
d(3) = 5 * 3 + 150
d(3) = 165
The time the distance after is 200 milesThis means that d(t) = 200
So, we have
5t + 150 = 200
Evaluate the difference
5t = 50
So, we have
t = 10
Hence, the time is 10 hours
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-Three independent fair coins have been tossed. For i = 1, 2, 3 let
Xi = 1 if the ith coin landed heads and Xi = 0 otherwise. Let Y = X1 + X2 and
Z = X2 + X3.
a. Give Y and Z as functions on the sample space Ω. Determine the joint
probability mass function of (Y, Z).
b. Are Y and Z independent? Why (not)?
Answer:
a. Y = X1 + X2 = 1(Heads) + 1(Heads) = 2
Z = X2 + X3 = 1(Heads) + 1(Heads) = 2
The joint probability mass function of (Y, Z) can be determined by multiplying the individual probabilities:
P(Y, Z) = P(Y) * P(Z)
P(Y, Z) = (2/8) * (2/8) = 1/16
b. Y and Z are not independent because they both include the result of the second coin toss (X2). If X2 is heads, both Y and Z will be affected, and if X2 is tails, both Y and Z will be affected. Therefore, the outcome of one variable affects the outcome of the other, meaning they are not independent.
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The cost of eight tickets to a Houston texans game is $498.40. What is the constant of proportionally, k, that relates the cost in dollars, y, to the number of tickets, x? ________
A recipe says to use 3 cups of flour to make 48 cookies. What is the constant of proportionality that relates the number of cookies made,y, to the number of cups of flor used, x?____
A circle has a diameter of 7.6 feet. What measurement is closet to the circumference of the circle in feet?
The constant of proportionality, k, that relates the cost in dollars, y, to the number of tickets, x, is $62.30. The constant of proportionality that relates the number of cookies made, y, to the number of cups of flour used, x, is 16. The circumference of the circle is approximately 23.876 feet.
1. To find the constant of proportionality, k, we need to divide the cost of the tickets by the number of tickets.
k = y/x = $498.40/8 = $62.30
Therefore, the constant of proportionality, k, is $62.30.
2. To find the constant of proportionality, k, we need to divide the number of cookies made by the number of cups of flour used.
k = y/x = 48/3 = 16
Therefore, the constant of proportionality is 16.
3. To find the circumference of a circle, we use the formula C = πd, where C is the circumference and d is the diameter.
C = π(7.6) = 23.876 feet
The measurement closest to the circumference of the circle in feet is 23.876 feet.
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find the median of 3,5,6,8,8,9,10
Answer:
the meadian is 8
Step-by-step explanation:
The value of the middle-most observation is called the median of the data.
\( \left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right),\left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right),\left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) \)
The cross product of the first two vectors is -60.
The given vectors are: \( \left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right),\left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right),\left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) \).
To find the cross product of the first two vectors, we use the formula:
\(\left(\begin{array}{l}a_1 \\ a_2 \\ a_3\end{array}\right) \times \left(\begin{array}{l}b_1 \\ b_2 \\ b_3\end{array}\right) = \left(\begin{array}{l}a_2b_3-a_3b_2 \\ a_3b_1-a_1b_3 \\ a_1b_2-a_2b_1\end{array}\right) \)
Plugging in the values from the given vectors, we get:
\(\left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right) \times \left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right) = \left(\begin{array}{l}(3)(4)-(4)(0) \\ (4)(5)-(1)(4) \\ (1)(0)-(3)(5)\end{array}\right) = \left(\begin{array}{l}12 \\ 16 \\ -15\end{array}\right) \)
Now, to find the dot product of this vector with the third given vector, we use the formula:
\(\left(\begin{array}{l}a_1 \\ a_2 \\ a_3\end{array}\right) \cdot \left(\begin{array}{l}b_1 \\ b_2 \\ b_3\end{array}\right) = a_1b_1 + a_2b_2 + a_3b_3 \)
Plugging in the values from the vectors, we get:
\(\left(\begin{array}{l}12 \\ 16 \\ -15\end{array}\right) \cdot \left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) = (12)(0) + (16)(0) + (-15)(4) = -60 \)
Therefore, the final answer is -60.
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The Clearwater Beach Kite Festival opened this weekend. Barbara is selling hand-painted
kites from a booth on the boardwalk. The table below shows the types of kites she has sold
so far today.
Type of kite Number sold
diamond
delta
parafoil
sled
11
9
6
4
Based on the data, what is the probability that the next kite Barbara sells will be a diamond?
Write your answer as a fraction or whole number.
The probability that the next kite Barbara sells will be a diamond is:
11/30How to find the probability that the next kite Barbara sells will be a diamondTo find the probability that the next kite Barbara sells will be a diamond, we need to divide the number of diamond kites sold by the total number of kites sold.
The formula for probability is
= required outcome (number of diamond kites) / possible outcome (total number of kites)
required outcome
The number of diamond kites sold is:
11
possible outcome
The total number of kites sold so far is:
11 + 9 + 6 + 4 = 30
Therefore, the probability that the next kite Barbara sells will be a diamond is 11/30
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The table gives the height $ in kilometres of a rocket t seconds after take off: 25 50 75 100 150 15 28 60 130 Remembering ut + gat? a. Find Pearson's correlation coefficient for an appropriate graph b. Find the rocket's acceleration in mls
To find Pearson's correlation coefficient, we need to first calculate the means, standard deviations, and covariance of the given data. Let's first convert the heights in km to m for ease of calculation.
t (s) h (m)
0 25,000
5 28,000
10 30,000
15 31,000
25 33,000
30 34,000
(a) Pearson's correlation coefficient:
We can use the formula
r = (nΣxy - ΣxΣy) / sqrt[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]
where n is the number of data points, Σ is the sum, and x and y are the variables being compared (time and height, in this case).
Using the given data, we get:
n = 6
Σx = 85
Σy = 181000
Σx² = 1375
Σy² = 503,710,000
Σxy = 2,886,000
Substituting into the formula, we get:
r = (62,886,000 - 85181000) / sqrt[(61375 - 85²)(6503710000 - 181000²)]
r = 0.994
Therefore, Pearson's correlation coefficient is 0.994, indicating a strong positive correlation between time and height.
(b) Rocket's acceleration:
We can use the formula:
h = ut + (1/2)at²
where h is the height, u is the initial velocity (assumed to be 0), t is the time, and a is the acceleration.
Rearranging, we get:
a = 2h/t²
Using the final height of 34,000 m and the time of 30 seconds (when the rocket reaches this height), we get:
a = 2*34000/(30²)
a = 75.6 m/s²
Therefore, the rocket's acceleration is 75.6 m/s².
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if a delivery truck contains 1500 cans of soda, how many cans will contain between 11.95 and 11.98 ounces of drink?
There will be 40 cans that contain between 11.95 and 11.98 ounces of drink.
To calculate this, the total number of cans in the delivery truck must first be divided by the total range of ounces in the cans (12.00-11.95 = 0.05). 1500/0.05 = 30000.
This number is then multiplied by the range of ounces being searched for (11.98-11.95 = 0.03). 30000*0.03 = 900.
Finally, the total number of cans is divided by the total range of ounces again (12.00-11.95 = 0.05). 900/0.05 = 40 cans.
Therefore, 40 cans contain between 11.95 and 11.98 ounces of drink.
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A regular hexagon is shown below. Find the value of x. (11x + 21)° X =
The given angle measures 120 degrees, which is indeed an interior angle of a regular hexagon
What is hexagon ?
A hexagon is a six-sided polygon, which is a two-dimensional geometric shape with straight sides. The word hexagon comes from the Greek words "hexa" meaning "six" and "gonia" meaning "angle."
To find the value of x in the regular hexagon, we can start by noting that the interior angles of a regular hexagon are all congruent and measure 120 degrees.
Next, we can see that the given angle (11x + 21)° is an interior angle of the hexagon. Therefore, we can set this angle equal to 120 degrees and solve for x:
11x + 21 = 120
11x = 99
x = 9
Therefore, the value of x is 9.
Note that we can check our answer by substituting x = 9 into the original equation:
11x + 21 = 11(9) + 21 = 120
Therefore, the given angle measures 120 degrees, which is indeed an interior angle of a regular hexagon
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Anyone help wit this
The lengths in the left side are proportional to the ones in the right side, with that we know that x = 10.
How to find the value of x?The lengths in the left side and the ones in the right side are proportional, such that the scale is k.
Then we can write:
21*k = 27
(x - 3)*k = (x - 1)
With the first equation, we can find the value of k, then we will get.
k = 27/21
Replacing that in the second equation we will get:
(x - 3)*27/21 = (x - 1)
Now we can solve this.
(x - 3)*27 = 21*(x - 1)
Now we can solve this for x.
27x - 81 = 21x - 21
27x - 21x = 81 - 21
6x = 60
x = 60/6 = 10
x = 10
That is the value of x.
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What is the Area of the triangle?
Add steps Please
0.2083335 is the Area of the triangle.
How do triangles work?
The three vertices of a triangle make it a three-sided polygon. The angles of the triangle are formed by the connection of the three sides end to end at a single point.
180 degrees is the sum of the triangle's three angles. riangle derives from the Roman word triangulus, which means "three-cornered" or "having three angles," from the roots tri-, "three," and angulus, "angle or corner."
1 ft 1 in = 12 + 1 = 13 in
the Area of the triangle = 1/2 * b * h
= 1/2 * 1 * 0.416667
= 0.416667/2
= 0.2083335
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D. Elementary Applications of the Fundamental Homomorphism Theorem In each of the following letAbe a commutative ring. Ifa∈Aandnis a positive integer, the notationnawill stand fora+a+…+a(n terms )1 Suppose2x=0for everyx∈A. Prove that(x+y)2=x2+y2for allxandyinA. Conclude that the functionh(x)=x2is a homomorphism fromAtoA. IfJ={x∈A:x2=0}andB={x2;x∈A), explain whyJis an ideal ofA,Bis a subring ofA, andA/J≅B
A/J≅B
The Fundamental Homomorphism Theorem states that for any homomorphism f from a ring A to a ring B, the kernel of f (the set of elements of A mapped to the identity of B) is an ideal of A. Applying this to the given problem, let A be a commutative ring and f:A→A be the homomorphism f(x)=x2. The kernel of f is J = {x∈A:x2=0}. Then J is an ideal of A.
To prove that (x+y)2=x2+y2 for all x,y∈A, consider (x+y)2 = (x+y)(x+y) = x2 + xy + yx + y2. Since A is commutative, xy=yx and so (x+y)2=x2+2xy+y2. Since 2xy=2yx, then (x+y)2=x2+y2, as desired.
Now, we can conclude that f is a homomorphism from A to A. In addition, B={x2;x∈A} is a subring of A, since for all x,y∈A, (x+y)2=x2+y2 and so x2+y2∈B. Moreover, since J is an ideal of A, A/J≅B.
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The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 21 HCF of water is
$35.39, and the cost for using 57 HCF is $83.99. What is the cost for using 56 HCF of water?
Monthly cost
(in dollars)
Water usage
(In HCF)
E
If the cost for using 21 HCF of water is $35.39. the cost for using 56 HCF of water is $82.64.
How to find cost for using 56 HCF of water?We can use the two given data points to find the slope and y-intercept of the linear function that represents the monthly cost of water use.
Let's use (21, 35.39) and (57, 83.99) as our two data points.
First, let's find the slope of the line:
slope = (y2 - y1) / (x2 - x1)
slope = (83.99 - 35.39) / (57 - 21)
slope = 48.6 / 36
slope = 1.35
Now that we have the slope, we can use either of the two data points to find the y-intercept. Let's use (21, 35.39):
y = mx + b
35.39 = 1.35 * 21 + b
35.39 = 28.35 + b
b = 35.39 - 28.35
b = 7.04
So the linear function that represents the monthly cost of water use is:
y = 1.35x + 7.04
where y is the cost (in dollars) and x is the amount of water used (in HCF).
Now we can use this function to find the cost for using 56 HCF of water:
y = 1.35x + 7.04
y = 1.35 * 56 + 7.04
y = 82.64
So the cost for using 56 HCF of water is $82.64.
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give the new coordinates of the ordered pair(7,-4) after a reflection across the x-axis?
Answer:
(7,4)
Step-by-step explanation:
Reflection across x-axis is making the y value the opposite of what it was prior. (x, y)→(x,-y)
That is the formula.
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Factorise : 9x^{2} +4x^{2} +16z^{2} +12xy-16yz-24xz[/tex]