Answer: The transformation r y=x reflects the point (x, y) across the line y = x, and the transformation T -3,3 translates the point (x, y) three units to the left and three units up. To find the image point of (-8, 2) after these transformations, we can follow these steps:
Apply the reflection r y=x to the point (-8, 2):
(-8, 2) reflects to (2, -8).
Apply the translation T -3,3 to the reflected point (2, -8):
(2, -8) translates to (-1, -5).
Therefore, the image point of (-8, 2) after the transformation r y=x T -3,3 is (-1, -5).
Step-by-step explanation:
Please Answer!!
After t years, the rate of depreciation of a car that costs $20,000 is 25%. What is the
value of the car 2 years after it was purchased?
[tex]\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\\ P=\textit{initial amount}\dotfill &20000\\ r=rate\to 25\%\to \frac{25}{100}\dotfill &0.25\\ t=\textit{elapsed time}\dotfill &2\\ \end{cases} \\\\\\ A = 20000(1 - 0.25)^{2} \implies A=20000(0.75)^2\implies A = 11250[/tex]
If a shoe size of 4 is added to the data, how does the median change?
The median stays 6.5.
The median decreases to 6.5.
The median stays 6.75.
The median decreases to 6.75.
Answer: The median decreases to 6.5.
Step-by-step explanation:
The median before 4 was added was 6.75.
When 4 is added the median is 6.5.
Amari gathered a random sample of oranges in her town. She calculated data on different variables. For one of the variables that she collected, she constructed a bar graph.
Which of the following variables did she use?
Type of orange
Diameter of the oranges
Number of navel oranges
Price per pound of oranges
"type of orange" because it is a bar graph therefore it is supposed to be categories, not numbers :)
A researcher looking for evidence of extrasensory perception (ESP) tests 1000 1000 subjects. Nine of these subjects do significantly better ( P < 0.01 ) (P<0.01) than random guessing.
(a) Nine subjects may seem like a lot of people, but can you conclude that these nine people have ESP? Select the appropriate statement that explains whether or not it is proper to conclude that these nine people have ESP.
Yes. This follows directly from the 1 % 1% significance level.
Yes. This follows directly from the statistical significance.
No. Since the tests were performed at the 1% significance level, as many as 10 subjects may have done significantly better than random guessing.
No. The sample size was not large enough for any statistical inference.
it is important to note that the sample size of 1000 subjects is large enough for statistical inference, but the significance level must be taken into account when interpreting the results.
No. Since the tests were performed at the 1% significance level, as many as 10 subjects may have done significantly better than random guessing.
When conducting hypothesis testing, the significance level (in this case, 0.01 or 1%) is the probability of rejecting the null hypothesis when it is actually true. This means that there is a 1% chance of observing a significant result purely by chance, even if the null hypothesis (in this case, that the subjects do not have ESP) is true.
In this scenario, nine subjects performed significantly better than random guessing, which may suggest that they have ESP. However, due to the possibility of observing significant results by chance, it is not proper to conclude that these nine people have ESP. There is still a chance that these results are purely coincidental.
Additionally, it is important to note that the sample size of 1000 subjects is large enough for statistical inference, but the significance level must be taken into account when interpreting the results.
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Dion brought $35.75 to the state fair. He bought a burger, a souvenir, and a pass. The burger was
1/6 as much as the souvenir, and the souvenir cost 3/4 the cost of the pass. Dion had $2.00 left over after buying these items. What was the cost of each item?
The burger costs $0.625, the souvenir costs $3.75, and the pass costs $5.00.
What was the cost of each item?Let's name the burger price "b," the souvenir price "s," and the pass price "p." Then, using the information provided, we can construct an equation system:
b + s + p = 35.75 (1) (The three things cost a total of $35.75.)
b = (1/6)s (2) (the burger was one-sixth the price of the memento).
s = (3/4)p (3) (the memento cost one-quarter the price of the pass)
b + s + p + 2 = 35.75 (4) (After purchasing these products, Dion had $2.00 left over.)
To remove s from the equations, we can apply equations (2) and (3):
b + (3/4)p + p = 35.75 (equations (1) and (3))
b = (1/6)(3/4)p (Applying Equation (2))
b = (1/8)p
This expression can now be substituted by Input b into equation (1):
(1/8)p + (3/4)p + p = 35.75
(7/8)p = 35.75
p = 35.75 / (7/8)
p = $5.00
We may calculate the cost of the keepsake using equation (3):
s = (3/4)p = (3/4)($5.00) = $3.75
Finally, we can calculate the cost of the burger using equation (2):
b = (1/6)s = (1/6)($3.75) = $0.625
As a result, the burger costs $0.625, the souvenir costs $3.75, and the pass costs $5.00.
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If two angles of a triangle are congruent to the corresponding angles of a second triangle,
then the third angle of the first triangle is congruent to the third angle of the second
triangle.
A. True
B. False
Answer:
A. True
Step-by-step explanation:
If two angles of a triangle are congruent to the corresponding angles or the second triangle than the third angles must be congruent to each other.
The sum of the interior angles of a triangle is 180. Let's say 2 angles to one triangle is 100 and the second angle is 35. That forces the third angle to be 45 (100 + 35 + 45 = 180)
Helping in the name of Jesus.
Answer:
A. True
Step-by-step explanation:
In congruent triangles...All angles and sides have to be equal.
Work out he area of this circle. Take pi to be 3. 142 and give your answer to 1 decimal place
The area of circle with radius 4 centimetres and the special math constant, pi to be 3. 142 is equals to the 50.3 cm².
Area of a shape is defined as the total spece covered by shape in two-dimensional. In geometry, the area enclosed circle is calculated by π times the square of radius of circle. Formula of Area = π × r², where 'r' is the radius. The units of area are square of units of radius that if radius in feet then unit of area will be square feet. We have a circle with radius say r = 4 cm.
The value of specific math constant, pi ( i.e., π) is equals to be 3.142. We have to determine the area of circle. The area of circle, A = π× 4²
=> A = 16π
=> A = 16× 3.142
=> A = 50.272 ~ 50.3 cm²
Hence, the required area value is 50.3 cm².
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Complete question:
The above figure completes the question.
Work out he area of this circle. Take pi to be 3. 142 and give your answer to 1 decimal place
the masses, in grams, of ten ball bearings taken at random from a batch are: 25.9, 24.7, 23.4, 24.5, 25.0, 26.9, 26.4, 25.8, 23.2, 21.9. calculate a 95% confidence interval for the mean mass of the population, supposed normal, from which these masses were drawn? what is x2, the upper limit of the 95% confidence interval? enter your answer rounded to two decimal places. for example, if your answer is 12.345 then enter as 12.35 in the answer box.
The 95% confidence interval for the mean mass of the population is 24.57 ± 1.06. The upper limit of the 95% confidence interval is 25.63.
Given the masses, in grams, of ten ball bearings taken at random from a batch are: 25.9, 24.7, 23.4, 24.5, 25.0, 26.9, 26.4, 25.8, 23.2, 21.9
We have to calculate a 95% confidence interval for the mean mass of the population, supposed normal, from which these masses were drawn.The formula for the Confidence Interval is given by,
CI = X bar± tα/2 * (s/√n)
Where,
CI = Confidence Interval
Xbar = Sample mean
tα/2 = α level of significance/2 (α is the level of significance)
s = sample s
tandard deviationn = sample size
tα/2 = t-distribution value for α/2 and (n-1) degrees of freedomtα/2 for α = 0.05 and (n-1) degrees of freedom
tα/2 = 2.262
Hence,CI = X bar ± tα/2 * (s/√n)
CI = 24.94 ± 2.306 * (1.618/√10)
CI = 24.94 ± 1.36
Upper limit of 95% confidence interval
x2 = 24.94 + 1.36= 26.30
Rounded off to two decimal places, x2 is 26.30.
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3×+9×=6×+42 solve for ×
Answer:
x=7
Step-by-step explanation:
First, try to bring all your X's together
3x+9x=6x+42
12x=6x+42
-6x -6x
6x=42
/6 /6
x = 7
Can someone please help me? I’ll give brianliest!
Answer:
B
Step-by-step explanation:
first you would need to do the inverse of sine to get the angle since normal sine would give you the length and you need the angle.
An easy way to remeber sine, cosine and tangent is
SOH CAH TOA
sin= opposite/ hypotenuse
cosine= adjacent/ hypotenuse
tangent= opposite/adjacent.
first label your triangle with the sides hypotenuse, adjacent and opposite.
hypotenuse is the longest side that is diagonal in this case like ab
opposite is the side that is opposite the angle you are looking for, so in thsi case line cb
adjacent is the like next to the angle you are trying to find so in thsi case like ac
and since we know sine inverse = opposite/hypotenuse = angle
(we are using sine for this question since that is what the question is asking for)
we simply do
sine inverse= 3/5
so the answer is B
i hope this helps! :)
Answer:B
Step-by-step explanation: im sure because i answer that in school im correct
Which of the following is a TRUE statement about hypothesis testing?
A: If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.
B: Whether to use a one-sided or a two-sided test is typically decided before the data are gathered.
C: If a hypothesis test is conducted at the 1% level, there is a 1% chance of rejecting the null hypothesis.
D: The probability of a Type I error plus the probability of a Type II error always equals one.
E: The power of a test concerns its ability to detect a null hypothesis.
If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.
What is hypothesis testing?
A statistical hypothesis test is a technique for determining if the available data are sufficient to support a specific hypothesis. We can make probabilistic claims regarding population parameters through hypothesis testing.
Here,
We have to find the correct statement about hypothesis testing.
We concluded that If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.
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Answer:
In this case, B is true.
Whether to use a one-sided or a two-sided test is typically decided BEFORE the data are gathered, not after.
Be careful while reading the options on the quiz, because depending on the question you get, the options may be worded slightly differently. Because of the wording, the answer may be different as well (on the FLVS quiz, I got different answer choices for this question). Be careful and read cautiously!
Have a great day.
1. A car's speed increases as it merges onto a highway. The car travels at 65 mph on the highway until it slows to exit. The car then stops at three traffic lights before reaching its destination. Draw a sketch of a graph that shows the car's speed over time.
Just make a flat line for each time the car stops.
Hope this helps.
please does anyone know how to solve this table
Assuming the table models a linear equation, we will get the complete table:
minutes: 10 40 89.3 150 360
cost: 200 225.7 268 320 500
How to complete the table?Here we can assume that the table models a linear equation of the form:
y = ax+ b
Where a is the rate of change and b is the y-intercept.
If we know two points on the line, let's say:
(x₁, y₁) and (x₂, y₂), then the rate of change is:
a = (y₂ - y₁)/(x₂ - x₁)
In the table we have two pairs:
(10, 200) and (150, 320)
Then the rate is:
a = (320 - 200)/(150 - 10)
a = 12/14 = 6/7
Then we can write:
y = (6/7)*x + b
To find the value of b, we can replace one of the two points there, using (10, 200) we will get:
200 = (6/7)*10 + b
200 = 60/7 + b
200 - 60/7 = b
1400/7 - 60/7 = b
1340/7 = b
Then the line is:
y = (6/7)*x + 1340/7
Now to complete the table, just replace the correspondent values in the equation.
for the first value we have x = 40
y = (6/7)*40 + 1340/7 = 225.7
if x = 360
y = (6/7)*360 + 1340/7 = 500
if y = 268
268 = (6/7)*x + 1340/7
x = (268 - 1340/7)*(7/6)
x = 89.3
Then the complete table is:
minutes: 10 40 89.3 150 360
cost: 200 225.7 268 320 500
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Addison wanted to know if there was a connection between her coffee consumption and how
well she slept that night. For weeks, Addison recorded how many cups of coffee she drank in
the morning and how many hours she slept that night.
0 cups of coffee
1 cup of coffee
6 hours 7 hours
1
5
5
4
What is the probability that a randomly selected day is one when she drank exactly 1 cup of
coffee and is one when she slept about 6 hours?
Simplify any fractions.
Answer:
Step-by-step explanation:
The distance from Sunderland to Wigan is 150 miles.
Mollie leaves Sunderland in her car at 07:50.
Her average speed on the journey is 60mph.
What time does she arrive in Wigan?
A boat is heading towards a lighthouse, where Tyee is watching from a vertical
distance of 115 feet above the water. Tyee measures an angle of depression to the boat
at point A to be 15°. At some later time, Tyee takes another measurement and finds
the angle of depression to the boat (now at point B) to be 50°. Find the distance from
point A to point B. Round your answer to the nearest foot if necessary.
In the given problem, the distance from point A to point B is approximately 658 feet (rounded to the nearest foot).
How to Calculate the Distance?Let's define some variables:
Let h be the height of the lighthouse (given as 115 ft).Let d be the distance from Tyee to point A.Let x be the distance from Tyee to point B.Using trigonometry, we can write the following equations:
For triangle ACT, we have:
tan(15°) = h/d
For triangle BCT, we have:
tan(50°) = h/(d+x)
We want to find the value of x, so let's rearrange the second equation:
tan(50°) = h/(d+x)
tan(50°)*(d+x) = h
d+x = h/tan(50°)
x = h/tan(50°) - d
Substituting the given values:
x = 115/tan(50°) - d
Now we need to find the value of d. For that, we can use the first equation:
tan(15°) = h/d
d = h/tan(15°)
Substituting the given value:
d = 115/tan(15°)
Now we can substitute both values into the equation for x:
x = 115/tan(50°) - 115/tan(15°)
Using a calculator, we get:
x ≈ 658.4 ft
Therefore, the distance from point A to point B is approximately 658 feet (rounded to the nearest foot).
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Paul gets $5 every week for doing his chores. He is saving his money to buy a skatboard that costs $85. He has already saved $25. A : w = 85 / 5
B : w = 85 - 25
C : w - 85 / 5 - 25
D: w = 85-25/ 5
The answer is D: w = 85-25/ 5. This equation represents the number of weeks it will take Paul to save enough money to buy the skateboard.
What is equation?Equations are useful for solving problems, finding unknown values, determining rates of change, and understanding relationships between different variables.
The equation can be written as w = (85 - 25)/5, where 85 is the cost of the skateboard, 25 is the amount he has already saved, and 5 is the Subtracting 85-25, the equation is essentially asking how many 5s are in 60.
The answer is 12, which is the number of weeks it will take Paul to save enough money for the skateboard.
This can be verified by multiplying 12 by 5, which equals 60.
Thus, the correct answer is D: w = 85-25/ 5.
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Question :
Paul gets $5 every week for doing his chores. He is saving his money to buy a skateboard that costs $85. He has already saved $25. Which equation describes the number of weeks (w) that it will take Paul to save enough money to buy the skateboard?
A : w = 85 / 5
B : w = 85 - 25
C : w - 85 / 5 - 25
D: w = 85-25/ 5
0.5 ( 5 − 7 x ) = 8 − ( 4 x + 6 )
Answer:
Well,
[tex]0.5(5-7x)=8-(4x+6)\\-3.5x+2.5=-4x+2\\0.5x+2.5=2\\0.5x=-0.5\\x=-1[/tex]
Step-by-step explanation:
Hope this helps!^^
Answer: -1
Step-by-step explanation:
first you want to simplify 0.5 (5-7x) which will get you 2.5 - 3.5x
then you will do the same for the other side move the xs to one side then treat it like any other problem
Simplify the expression. Enter the answer in the box. 3 2/5 + (-7 1/5) = 3 + (-7) + 2/5 + (-1/5)
Please help with this question.
Where the above mean exist, the values of x and y are 10.5 and 3.5 respectively.
What is the explanation for the above response?The total number of people surveyed is 24. So we can write:
Frequency of 0 sisters + Frequency of 1 sister + Frequency of 2 sisters + Frequency of 3 sisters = Total frequency
5 + x + 5 + y = 24
x + y = 14 --- (1)
Also, we know that the mean number of sisters is 1.25. This means that the total number of sisters divided by 24 should be equal to 1.25. So we can write:
0 × 5 + 1 × x + 2 × 5 + 3 × y = 1.25 × 24
x + 3y = 21 --- (2)
Now we have two equations (1) and (2) with two variables (x and y). We can solve for x and y by simultaneous equations.
Multiplying equation (1) by 3, we get:
3x + 3y = 42 --- (3)
Subtracting equation (2) from equation (3), we get:
2x = 21
x = 10.5
Substituting the value of x in equation (1), we get:
10.5 + y = 14
y = 3.5
Therefore, the values of x and y are 10.5 and 3.5 respectively.
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Find dy/dx for y=4sin²(3x)
Answer:
24 sin(3x) cos(3x)
Step-by-step explanation:
To find:-
The derivative of y = 4sin²(3x) .Answer:-
The given function to us is ,
[tex]:\sf\implies y = 4sin^2(3x) \\[/tex]
To find it's derivative we would have to use Chain rule of differentiation , which is ;
[tex]:\sf\implies \pink{ \dfrac{dy}{dx}=\dfrac{dy}{du}\cdot \dfrac{du}{dx}} \\[/tex]
Taking the given function,
[tex]:\sf\implies y = 4sin^2(3x) \\[/tex]
Differentiate both sides with respect to x,
[tex]:\sf\implies \dfrac{dy}{dx}=\dfrac{d}{dx}4sin^2(3x)\\[/tex]
We can take out the constant as ,
[tex]:\sf\implies \dfrac{dy}{dx}= 4 \dfrac{d}{dx}sin^2(3x) \\[/tex]
Multiply and divide by sin(3x) as ,
[tex]:\sf\implies \dfrac{dy}{dx}= 4 \bigg( \dfrac{d(sin^23x)}{d(sin3x)}\times \dfrac{d\ sin3x}{dx}\bigg)\\[/tex]
Differentiation of sin(nx) is n cos(nx) and
[tex]:\sf\implies \pink{ \dfrac{d(x^n)}{dx} = nx^{n-1} }[/tex]
So that ,
[tex]:\sf\implies \dfrac{dy}{dx}= 4 ( 2sin(3x) \cdot 3cos(3x))\\[/tex]
Simplify,
[tex]:\sf\implies\pink{ \dfrac{dy}{dx}= 24\ sin(3x) \ cos (3x)}\\[/tex]
Hence the derivative of the given function is 24 sin(3x) cos(3x) .
[tex]\rule{200}2[/tex]
Related formulae :-
[tex]\boxed{\boxed{\begin{minipage}{5cm}\displaystyle\circ\sf\;\dfrac{d}{dx}(sin\;x)=cosx \\\\ \circ \;\dfrac{d}{dx}(cos\;x) = -sinx \\\\ \circ \; \dfrac{d}{dx}(tan\;x) = sec^{2}x \\\\ \circ\; \dfrac{d}{dx}(cot\;x) = -csc^{2}x \\\\ \circ \; \dfrac{d}{dx}(sec\;x) = secx \cdot tanx \\\\ \circ \; \dfrac{d}{dx}(csc\;x) = -cscx \cdot cotx \\\\ \circ\; \dfrac{d}{dx}(sinh\;x)=coshx \\\\ \circ\; \dfrac{d}{dx}(cosh\;x)= sinhx \\\\ \circ\;\dfrac{d}{dx}(tanh\;x)=sech^{2}h \\\\ \circ\;\dfrac{d}{dx}(coth\;x)=-csch^{2}x \\\\ \circ\;\dfrac{d}{dx}(sech\;x) =-sechx \cdot tanhx \\\\ \circ\;\dfrac{d}{dx}(csch\;x) = -cschx \cdot cothx\end{minipage}}}[/tex]
[tex]\rule{200}2[/tex]
Answer:
[tex]\dfrac{\text{d}y}{\text{d}x}=12 \sin (6x)[/tex]
Step-by-step explanation:
To find the derivative of y = 4sin²(3x), use the chain rule.
[tex]\boxed{\begin{minipage}{5.4 cm}\underline{Chain Rule for Differentiation}\\\\If $y=f(u)$ and $u=g(x)$ then:\\\\$\dfrac{\text{d}y}{\text{d}x}=\dfrac{\text{d}y}{\text{d}u}\times\dfrac{\text{d}u}{\text{d}x}$\\\end{minipage}}[/tex]
The given function can be written as:
[tex]y=4(\sin 3x)^2[/tex]
Let y = 4u², where u = sin(3x).
Differentiate the two parts separately.
[tex]\dfrac{\text{d}y}{\text{d}u}=8u \quad \text{and} \quad \dfrac{\text{d}u}{\text{d}x}=3 \cos (3x)[/tex]
Put everything into the chain rule formula:
[tex]\begin{aligned} \implies \dfrac{\text{d}y}{\text{d}x}& =\dfrac{\text{d}y}{\text{d}u}\times\dfrac{\text{d}u}{\text{d}x}\\\\&=8u \times 3 \cos (3x)\\\\&=24u \cos (3x)\\\\&=24 \sin (3x) \cos (3x) \end{aligned}[/tex]
Simplify using the sine double angle identity:
[tex]\boxed{\sin (2 \theta)= 2 \sin \theta \cos \theta}[/tex]
[tex]\begin{aligned} \implies \dfrac{\text{d}y}{\text{d}x}&=24 \sin (3x) \cos (3x) \\\\&=12(2 \sin (3x) \cos (3x))\\\\&=12 \sin (2 \cdot 3x)\\\\&=12 \sin (6x)\end{aligned}[/tex]
Therefore:
[tex]\dfrac{\text{d}y}{\text{d}x}=12 \sin (6x)[/tex]
[tex]\hrulefill[/tex]
Differentiation Rules[tex]\boxed{\begin{minipage}{5.8 cm}\underline{Differentiating $ax^n$}\\\\If $y=ax^n$, then $\dfrac{\text{d}y}{\text{d}x}=nax^{n-1}$\\\end{minipage}}[/tex]
[tex]\boxed{\begin{minipage}{5.8 cm}\underline{Differentiating $\sin (ax)$}\\\\If $y=\sin(ax)$, then $\dfrac{\text{d}y}{\text{d}x}=a \cos (ax)$\\\end{minipage}}[/tex]
A pyramid and a coke have the same base, area, slant height, and surface area. If the perimeter of the base of the pyramid is 314 centimeters, what is the radius of the cone
If the perimeter of the base of the pyramid is 314 centimeters, then radius of the cone is approximately 17.44 centimeters.
What is perimeter?Perimeter is a measurement of the distance around the outside of a two-dimensional shape. It is the sum of the lengths of the shape's sides.
Since the pyramid and cone have the same base and slant height, they are similar geometric figures. Therefore, their corresponding dimensions are proportional. Let's denote the radius of the cone as r.
Since the perimeter of the base of the pyramid is 314 centimeters, and the base of the pyramid is a square, we can find the length of one side of the square base by dividing the perimeter by 4:
Length of one side = Perimeter / 4 = 314 cm / 4 = 78.5 cm
Since the pyramid and the cone have the same area of the base, and the base of the pyramid is a square, we can find the area of the base by squaring the length of one side:
Area of the base = (Length of one side)² = (78.5 cm)²= 6,152.25 cm²
Since the pyramid and the cone have the same surface area, we can use the formula for the surface area of a cone to find the radius of the cone:
Surface area of the cone = πr(r + l), where l is the slant height.
The surface area of the cone is equal to the surface area of the pyramid, so we have:
πr(r + l) = 2 × Area of the base + Perimeter × l
Substituting the known values, we get:
πr(r + 13) = 2 × 6,152.25 cm² + 314 cm × 13 cm
Simplifying and solving for r, we get:
πr² + 13πr - 4,059.5 = 0
Using the quadratic formula, we find:
r ≈ 17.44 cm (rounded to two decimal places).
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Wants to buy new boots that cost $68. The sales tax rate in her city is 5-%. What is the total cost for the boots
Emily new boots cost a total of $71.4 with the tax included as 5% and the original cost of the boots being $68.
The sales tax rate in Emily's city = 5% and the cost of Emily's new boots is $68
we need to find the amount of sales tax Emily will pay for her boots,
The formula we will use =
Sale tax = Percent sales tax x Cost of the product
when we put the values in the formula, we get:
Sales tax = 5% x $68
= $3.4
now we need to also calculate the total cost for Emily's boots,
Therefore, the total cost = Cost of boots + Sales Tax
when we put the values in the formula, we get:
Total cost = $68 + $3.4
= $71.4
Therefore, the total cost Emily will pay for her boots is $71.4
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Find the area of the shaded polygon.
To find the area of the shaded polygon, we had to assume that each dotted line was one unit. In which case, the coordinates are:
A(1,4)B (5,6)C (6, 3)D (3, 2)Hence, the area of the polygon is A [tex]\approx[/tex] 11.15 units.
To get the area of the polygon, we must determine the length of all it's sides.
a) A-B is given by the distance formula:
distance = √((x2 - x1)² + (y2 - y1)²)
where (x1, y1) and (x2, y2) are the coordinates of the two points.
Using this formula, we can calculate the distance between points A(1,4) and B(5,6) as follows:
distance = √((5 - 1)² + (6 - 4)²)
= √(16 + 4)
= √(20)
A-B = 4.47213595
A-B [tex]\approx[/tex] 4.47
b)
To find B-C we use the same method:
B-C = 3.16 units.
c)
To find C- D we use the same method:
C- D [tex]\approx[/tex] 3.16 units.
d) to find D-A we use the employ the same method:
D - A [tex]\approx[/tex] 2.83
Since this is an irregular quadrilateral, we will require the use of the
length of one of it's diagonals which is also computed using the distance formula to get: 4.47 Units.
Calculate the perimeter of ABCD
Perimeter of ABCD = AB + BC + CD + AD
Perimeter of ABCD = 4.4721359549996 + 3.1622776601684 + 3.1622776601684 + 2.8284271247462
Perimeter of ABCD = 13.625118400083
Calculate the semi-perimeter (s) of ABCD
s = Perimeter ÷ 2
s = 13.625118400083 ÷ 2
s = 6.8125592000413
Calculate the Area (A) using Brahmagupta's Formula
A = √[(s - a)(s - b)(s - c)(s - d)]
A = √(6.8125592000413 - 4.4721359549996)(6.8125592000413 - 3.1622776601684)(6.8125592000413 - 3.1622776601684)(6.8125592000413 - 2.8284271247462)
A = √(2.3404232450417)(3.6502815398729)(3.6502815398729)(3.9841320752951)
A = √(124.24555320337)
A = 11.14654893693
A [tex]\approx[/tex] 11.15 units.
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Find the area of the shaded segment of the circle
The area of the shaded segment of the circle is calculated by substracting the area of triangle from area of sector of circle So, area of shaded segment of the above circle is equals to the (12π - 9√3) cm².
Assume a sector having a radius r and a central angle of α degrees. The sector's area will be A= (α/360∘)πr². Similarly, different shapes have different area formulas. We have been provided a circle of radius 6cm. Assume that its center is O and the segment is AB. Radius of circle , r = 6 cm
Central angle,α = 120°
Area of shaded segment is calculated by the area of sector AOB of circle minus area of triangle AOB formed there. So, Area of sector AOB , A = (α/360∘)πr²
= ( 120°/360°) π6²
= (1/3) 36π = 12π cm²
As we know, OA = OB= 6cm
=> m∠OAB = m∠OBA
and m∠AOB + m∠OAB + m∠OBA = 180∘
=> 120∘ + m∠OAB + m∠OAB= 180∘
=> 2(m∠OAB) = 180∘− 120∘ = 60°
=> m∠OAB = 30° = m∠OBA
So, it is an isosceles triangle. Draw a perpendicular OC on AB then there is formed two right angled triangles. In right angled triangle OAC, 90°, 60°, 30° and OA = 6 cm then OC/6 = Sin 30°
=> OC= 3 cm and
AC = √36 - 9 = √27 = 3√3 cm
Similarly, BC = 3√3 cm so, AB = 6√3 cm. Now, area of triangle AOB = (1/2) × AB × OC = (1/2)× 6√3 ×3 = 9√3 cm²
So, required area = 12π cm² - 9√3 cm². Hence, required value is (12π - 9√3) cm².
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Complete question:
The above figure completes the question. Find the area of the shaded segment of the circle.
7 divided by 70.85 show work
Solve the radical equation.
negative 5 square root of 2 x minus 1 end root equals space minus 15
The sοlutiοn tο the radical equatiοn is x = 5.
What is radical equatiοn?In mathematics, a radical is the οppοsite οf an expοnent, which is symbοlised by the symbοl "," alsο referred tο as rοοt. A square rοοt οr a cube rοοt can be used, and the number befοre the symbοl οr radical is regarded as an index number οr degree. The expοnent οf this number cancels the radical and is a whοle number.
What is the basic arithmetic οperatiοns?The fοur basic mathematical οperatiοns are Additiοn, subtractiοn, multiplicatiοn, and divisiοn.
Starting with:
-5√(2x - 1) = -15
Divide bοth sides by -5:
√(2x - 1) = 3
Square bοth sides:
2x - 1 = 9
Add 1 tο bοth sides:
2x = 10
Divide bοth sides by 2:
x = 5
Hence, the solution to the equation is x = 5.
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A standard size golf ball has a diameter of 1. 680 inches. The material used to make the golf balls weighs 0. 6523 ounces per cubic inch. What is the weight, to the nearest hundredth of an ounce of one golf ball
The volume of a standard size golf ball can be calculated using the formula for the volume of a sphere:
V = (4/3)πr^3
where r is the radius of the golf ball. The diameter of the golf ball is 1.680 inches, so the radius is 0.840 inches.
V = (4/3)π(0.840)^3
= 2.468 in^3
The weight of the golf ball can be calculated by multiplying its volume by the density of the material:
W = V × D
where D is the density of the material. The density of the material is 0.6523 ounces per cubic inch.
W = 2.468 in^3 × 0.6523 oz/in^3
= 1.6095 oz
Therefore, the weight of one golf ball is approximately 1.61 ounces (rounded to the nearest hundredth of an ounce).
the probability of a potential employee passing a drug test is 90%. if you selected 11 potential employees and gave them a drug test, how many would you expect to pass the test?
The required expected number of employees who will pass the test from given 11 potential employees is equal to 10.
Probability of passing a drug test is 90%,
Then the probability of failing is 10%.
For each potential employee,
Probability of passing is 0.9, and the probability of failing is 0.1.
The number of potential employees who would be expected to pass the test,
Calculated using the binomial distribution with n = 11 and p = 0.9.
P(A = x) = (ⁿCₓ) × pˣ × (1-p)ⁿ⁻ˣ
where,
A is the number of potential employees who pass the test
x is the number of potential employees who pass the test
n is the number of potential employees
p is the probability of passing the test
Using this formula, the expected number of potential employees who would pass the test is,
E(A) = n ×p
= 11 × 0.9
= 9.9
Rounding to the nearest whole number, we can expect 10 potential employees to pass the test.
Therefore, the expected number of employees from the given probability who would pass the the test is 10.
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f(x) = 16, x = *
f(x) = x² - 6x + 9
Multiple choice: Finding: x values
-7
7
1
-1
The values of the variable x are 7 and -1. Options B and D
What are functions?
Functions are simply defined as those equations, expressions or laws that shows the relationship between two variables.
These variables are;
The independent variablesThe dependent variablesFrom the information given, we have that;
f(x) = 16
f(x) = x² - 6x + 9
Now, equate the two functions, we have;
x² - 6x + 9 = 16
collect the like terms
x² - 6x + 9 - 16 = 0
subtract the values
x² - 6x - 7 = 0
solve the quadratic equation
x² - 7x + x - 7 = 0
x(x - 7) + 1( x - 7)
Then, x = 7 and -1
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