Describe the key features of the parabola y2 = 8x.
Answers
Sample Response: The value of p is 2. The parabola opens to the right. The focus is at (2, 0) and the equation of the directrix is x = –2. The axis of symmetry is y = 0. The vertex is at the origin, (0, 0).
I hope that helps a little!
Answer: The value of p is 2. The parabola opens to the right. The focus is at (2,0). The equation of the directrix is x=-2.
Step-by-step explanation:
Related Questions
A student faculty government committee of 4 people is to be formed from 20 student volunteers and 5 faculty volunteers. Find the probability that the committee will consist of the following, assuming the selection is made at random: a. two students and two faculty members and b. one faculty member and three students. ...?
Answers
To solve the question, calculate the total possible ways to form a committee and the ways for each specific case. The probability can be determined by dividing the specific event by the total outcomes. This involves the mathematical principles of combinatorics and probability.
Explanation:
The question is dealing with the concept of combinatorics and probability. In such cases, we look at the total possible outcomes and the outcomes of our specific event of interest.
For the first case, we need to select 2 students and 2 faculty members from respective pools of 20 and 5. The total ways to form a committee are combinations of 4 from 25 (20 students + 5 faculty). So, we have:
Total outcomes = C(25,4)
The event of interest (2 students and 2 faculty) can be calculated as the product of combinations of selecting 2 from each pool:
Specific event outcomes = C(20,2)*C(5,2)
To get the probability, we divide the outcomes of our event of interest by the total outcomes.
The second scenario works similarly. You want one faculty and three students:
Specific event outcomes = C(20,3)*C(5,1)
You'd again divide this result by the total possible outcomes (determined the same as the first scenario) to obtain the desired probability.
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The probability of forming a committee with two students and two faculty members is 15%, while the probability of forming a committee with one faculty member and three students is 45%.
Explanation:a. Two students and two faculty members:
To find the probability of selecting two students and two faculty members, we need to calculate the number of ways this combination can occur and then divide it by the total number of possible combinations.
The number of ways to select two students from 20 is C(20, 2) = 190.
The number of ways to select two faculty members from 5 is C(5, 2) = 10.
The total number of ways to form a committee of 4 from 25 volunteers is C(25, 4) = 12,650.
So the probability is (190 * 10) / 12,650 = 1900 / 12,650 = 0.15, or 15%
b. One faculty member and three students:
Similarly, the number of ways to select one faculty member from 5 is C(5, 1) = 5, and the number of ways to select three students from 20 is C(20, 3) = 1,140.
The total number of ways to form a committee of 4 from 25 volunteers is still C(25, 4) = 12,650.
So the probability is (5 * 1,140) / 12,650 = 5,700 / 12,650 = 0.45, or 45%
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The Census Bureau says that the 10 most common names in the United States are (in order) Smith, Johnson, Williams, Brown, Jones, Miller, Davis, Garcia, Rodriguez, and Wilson. These names account for 9.6% of all U.S. residents. Out of curiosity, you look at the authors of the textbooks for your current courses. There are 9 authors in all. Would you be surprised if none of the names f these authors were among the 10 most common? (Assume that authors' names are independent and follow the same probability distribution as the names of all residents.)
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The probability suggests a 28.7% chance that none of the 9 authors have names among the 10 most common.
In a probability context, the likelihood of encountering one of the 10 most common names among the authors of your textbooks can be estimated based on the fact that these names account for 9.6% of all U.S. residents. However, the probability distribution of authors' names may not precisely mirror that of the general population, as authorship is influenced by factors beyond name popularity.
Given that there are 9 authors, each with an independent chance of having a name among the top 10, the probability that none of them have a common name is [tex]0.904^{9}[/tex], assuming an even distribution. This is because
0.904 represents the proportion of names that are not in the top 10.
Calculating this probability results in approximately 0.287, or 28.7%. So, there is about a 28.7% chance that none of the authors have a name among the 10 most common.
In a brief summary, it wouldn't be overly surprising if none of the authors' names matched the 10 most common names given the probability, but it's not an unexpected outcome. Probability alone doesn't guarantee specific outcomes in small samples.
Given the conditional statement "If it is January, then it is winter in the United States," which is true?
A) The Converse Of The Conditional
B) The Inverse Of The Conditional
C)The Contropositive Of The Conditional
D) Not Here ...?
Answers
Given the conditional statement, 'If it is January, then it is winter in the United States.' The convese and inverse aren't always true, but the contrapositive is, therefore, the correct answer is C) The Contrapositive of the Conditional.
Explanation:The given statement is 'If it is January, then it is winter in the United States.' In logic, this statement is termed as a conditional statement. Let's analyze the options provided:
The Converse of the Conditional: This would reverse the statement to 'If it is winter in the United States, then it is January.' This is not always true since winter lasts for three months: December, January, and February.The Inverse of the Conditional: This would negate both the original statement's hypothesis and conclusion, resulting in 'If it is not January, then it is not winter in the United States,' which is also not always true.The Contrapositive of the Conditional: This reverses and negates the statement, turning it into 'If it is not winter in the US, then it is not January.' This statement is true. If it's not winter (meaning it's spring, summer, or fall), it cannot be January.Learn more about Conditional Logic here:https://brainly.com/question/2114683
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Your friend has $80 when he goes to the fair. He spends $4 to enter the fair and $12 on food. Rides at the fair cost $1.25 per ride. Which function can be used to determine how much money he has left over after x rides?
A) f(x) = 1.25x + 64
B) f(x) = -16x + $80
C) f(x) = -1.25x + 64
D) f(x) = -1.25x - 64
Answers
x - number of rides
Let's go step by step:
He had 80$: f(x) = 80
He spends $4 to enter the fair: f(x) = 80 - 4
He spends $12 on food: f(x) = 80 - 4 - 12
Rides at the fair cost $1.25 per ride x: f(x) = 80 - 4 - 12 - 1.25x
f(x) = 80 - 4 - 12 - 1.25x
f(x) = 64 - 1.25x
f(x) = -1.25 + 64
Nathan cut 3 pieces of rope. Each was between 1.1 m and 1.2 m. Write down how long each piece might be.
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Select one of the factors of x3y2 + 8xy2 - 5x2 - 40.
Can someone help me figure this out?
answer choices
(xy2 + 5)
(x2 + 4)
(xy2 - 5)
(x2 - 8)
Answers
= x y² ( x² + 8 ) - 5 ( x² + 8 ) =
= ( x² + 8 ) ( x y² - 5 )
Answer:
On of the factors is:
C ) ( x y² - 5 )
Answer:
[tex](xy^2-5)\text{ is one factor of above polynomial}[/tex]
Step-by-step explanation:
Given the polynomial
[tex]x^3y^2+8xy^2-5x^2-40[/tex]
we have to select the option which is one of the factor of above polynomial.
[tex]x^3y^2+8xy^2-5x^2-40[/tex]
[tex]xy^2(x^2+8)-5(x^2+8)[/tex]
[tex](xy^2-5)(x^2+8)[/tex]
[tex]\text{Hence, }(xy^2-5)\text{ is one factor of above polynomial}[/tex]
∴ Option 3 is correct
The length of a rectangle is 3 inches more than the width. the perimeter is 42 inches. find the length and width.
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Why isn't there work when carrying something horizontally at a constant speed?
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use benchmarks to estimate 2.81+3.73
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2. 81 → 2.75
+
3.73 → 3.75
------------
2.75 + 3.75 = 6.50
Alexander has 418 song on his mp3 player. he divides the songs into 11 equal groups. about how many songs are in each group
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TRUE or FALSE. 6 1/3 percent is equal in fraction to 4/75
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When you calculate 6 1/3 percent, it is 0.063, whereas 4/75 is 0.053, so they are not equal.
Robert buys 4 pounds of cauliflower at $0.85 a pound. He also buys 4 pounds of brussels sprouts. If he spends $6.40 on the vegetables, how much did the brussels sprouts cost per pound? A. $0.80 B. $0.75 C. $0.85 D. $0.76
Answers
$6.40 - $3.40 = $300
Brussel sprouts per pound = $300 / 4
= $0.75
use a finite sum to estimate the average value of f on the given interval by partitioning the interval into four subintervals of equal length and evaluating the f at the subinterval midpoints.
f(x)=x^4 on [0,2]
Answers
Midpoints = 0.25, 0.75, 1.25, 1.75
Required sum = 0.5(0.25^4 + 0.75^4 + 1.25^4 + 1.75^4)/(2 - 0) = 0.5(0.00390625 + 0.31640625 + 2.44140625 + 9.37890625)/2 = 0.25(12.140625) = 3.03515625
A function is a relationship between inputs where each input is related to exactly one output.
The average value of the function f(x) on [0, 2] is 3.03515625.
What is a function?A function is a relationship between inputs where each input is related to exactly one output.
Example:
f(x) = 2x + 1
f(1) = 2 + 1 = 3
f(2) = 2 x 2 + 1 = 4 + 1 = 5
The outputs of the functions are 3 and 5
The inputs of the function are 1 and 2.
We have,
f(x) = [tex]x^{4}[/tex] on [0, 2]
Partitioning the interval into four subintervals of equal length.
= 2-0 / 4 = 2/4 = 1/2 = 0.5
This means the four subintervals are:
[0, 0.5], [0.5, 1], [1, 1.5], and [1.5, 2].
Midpoints of each partitioned interval.
[0, 0.5] = 0.25
[0.5, 1] = 0.75
[1, 1.5] = 1.25
[1.5, 2] = 1.75
Now,
f(0.25) = [tex]0.25^{4}[/tex]
f(0.75) = [tex]0.75^{4}[/tex]
f(1.25) = [tex]1.25^{4}[/tex]
f(1.75) = [tex]1.75^{4}[/tex]
Now,
The average value of f(x) = [tex]x^{4}[/tex] on [0, 2].
= 1/2 [ ([tex]0.25^{4}[/tex] + [tex]0.75^{4}[/tex] + [tex]1.25^{4}[/tex] + [tex]1.75^{4}[/tex])/(2 - 0)]
= 0.5 [ ([tex]0.25^{4}[/tex] + [tex]0.75^{4}[/tex] + [tex]1.25^{4}[/tex] + [tex]1.75^{4}[/tex])/2 ]
= 3.03515625
Thus,
The average value of the function f(x) on [0, 2] is 3.03515625.
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In Jaden’s garden, there is a triangular patch of grass. He wants to plant a geranium in the patch at a point equidistant from all its vertices. Where should Jaden plant the geranium?
in the center of the inscribed circle of the triangle
in the center of the circumscribed circle of the triangle
at the point of intersection of the angle bisectors of the triangle
at the point of intersection of an angle bisector and a perpendicular bisector of the triangle
Answers
Answer:
In the center of the circumscribed circle of the triangle
Step-by-step explanation:
This implies that he wish to plant a geranium in such a way that its position would be of equal distance to the vertices of the triangle.
To circumscribe a circle to the triangle means to construct or draw a circle outside the triangle. And the circle would touch the three vertices of the triangle externally. Thus, the center of the circle is equidistant to the vertices.
For Jade to plant a geranium in the patch at a point equidistant from all vertices of the triangle, he should plant it in the center of the circumscribed circle of the triangle.
how do i find what x equals for 7x-5=-5
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7x = 0 (⬅solve this if you divide [÷] both sides of the problem by "7")
Therefore, the value of "x" is: "0" (:
Your class is learning how to tie knots.each student needs a peace of rope thatis 3/8 yards. how much do we need for 16 stdents
Answers
the answer is 6
3/8 = .375
.375 × 16 = 6 yards
Sales on credit are immediately counted as cash receipts?
Answers
Hope this helps!
The correct answer to this open question is the following.
Sales on credit are not immediately counted as cash receipts.
When a good is sold and people pay for it with cash, that is counted as cash receipts. Other methods don't. If the product is sold on credit, the store is not receiving any cash at all. It is receiving a promise of pay that has to be payable by the credit institution or the bank.
Inverse function y = x2 − 18x.
Answers
The question is about finding the inverse of the quadratic function y = x^2 - 18x. To find the inverse, swap x and y then solve for y, considering the function's restricted domain to ensure it's a function. Understanding transformations like scaling, reflecting, and translating is also crucial for interpreting and graphing functions.
Explanation:The student is asking about how to find the inverse function of a given quadratic function y = x2
- 18x. To find the inverse, we need to swap the x and y variables and solve for y. The steps involve setting x = y2 - 18y and then applying the quadratic formula or completing the square to solve for y. It is important to note that not all functions have inverses that are also functions without restricting the domain, especially quadratics, which are not one-to-one. However, if we consider only the increasing or decreasing intervals separately, we can find a suitable inverse restricted to that part of the domain.
The critical points like x and y intercepts can help us to verify if we have found the correct inverse function. Additionally, understanding the effects of various transformations on the function can be useful in graphing and interpreting the inverse.
Regarding transformations of functions, the operations may include scaling, reflecting, and translating the graph. For instance, the function f(x) = 2x - 2 features a y-intercept at (0, 2) and would be transformed as follows for different operations:
f(2x) which shrinks the graph horizontally by a factor of half.f(-2x) which reflects the graph across the y-axis.f(-2(x+1)) which results in a horizontal shift to the left by one unit by adding 1 to the independent variable x.Mikel traded Australian dollars for Thai baht at an exchange rate of 1 Australian dollar = 29.3225 Thai baht. He gave the exchanger a total of $1900 and was charged a flat fee of $40. Approximately how many Thai baht does Mikel have?
Answers
1860 x 29.3225 = 54539.85
Answer:
The answer is 54539.85 Thai baht.
Step-by-step explanation:
1 Australian dollar = 29.3225 Thai baht.
Mikel gave the exchanger a total of $1900 and was charged a flat fee of $40.
As he was charged a fee so we will subtract it from the original amount.
[tex]1900-40=1860[/tex] Australian dollars
So, this amount in Thai baht becomes:
[tex]1860\times29.3225=54539.85[/tex] Thai baht.
The answer is 54539.85 Thai baht.
Which of the following are equal to the expression below?
square root of 40/2
A. square root of 10
B. 20
C. square root of 20
D. square root of 40/4
Answers
Find all solutions in the interval [0, 2π).
7 tan^3x - 21 tan x = 0
A) pi/3, 2pi/3, 4pi/3, 5pi/3
B) 0, pi/5, π, 6pi/5
C) 0, pi/3, 2pi/3, π, 4pi/3, 5pi/3
D) 0, pi/3, π, 4pi/3
Answers
7 tan^3 x - 21 tan x = 0 becomes
7a^3 - 21a = 0
7a(a^2 - 3) = 0
a = 0 or a^2 - 3 = 0
a = 0 or a^2 = 3
a = 0 or a = + or - √3
tan x = 0, tan x = √3, tan x = -√3
x = 0, pi, pi/3, 4pi/3, 2pi/3, 5pi/3
convert to an improper fraction, type your answer with the negative in the numerator.
-8 3/4
Answers
...................................................
The mixed number -8 3/4 can be converted to an improper fraction by multiplying the whole number by the denominator and adding the numerator, resulting in -29/4.
Explanation:The mixed number given is -8 3/4. An improper fraction is one where the numerator (top number) is greater than the denominator (bottom number). To convert a mixed number to an improper fraction, we should multiply the whole number by the denominator of the fraction and then add the numerator. Here, this would look like (-8*4)+3 = -32 + 3 = -29. The denominator stays the same. So, -8 3/4 is equal to -29/4 in improper fraction form.
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The minute hand of a clock is 9.5cm long. how far will the tip of the hand travel in one day
Answers
find teh circumference
c=2pir
c=2pi9.5
c=19pi
24 hours
19pi times 24=456pi cm per day aprox
1432.565952cm
Which of the following equations correctly expresses the relation between vectors A⃗ ,
B⃗ , and C⃗ shown in the figure?
A) A⃗ +B⃗ +C⃗ =0
B) A⃗ =B⃗ +C⃗
C) B⃗ =A⃗ +C⃗
D) C⃗ =A⃗ +B⃗
Answers
B) Is not correct
C) is correct. B starts where first starts and ends where last (in this case second) one ends.
D) is not correct
What form of a quadratic function would be graphed if the vertex at the same point as the y-intercept?
Answers
Which of the following points lie in the solution set to the following system of inequalities?
y > −3x + 3
y > x + 2
(2, −5)
(−2, 5)
(2, 5)
(−2, −5)
Answers
choose 3d
Answer:
Hi!
The correct answer is (2,5).
Step-by-step explanation:
To find which ordered pair is in the solution set of the system of inequalities:
y > −3x + 3 y > x + 2you have to replace the values into the system and both results have to be true.
For ordered pair (2,5) where x=2, and y=5.
y > −3x + 3 5 > -3(2) + 3 // replace the values5 > -6 + 35 > -3 is TRUE.AND
y > x + 2 5 > 2 + 25 > 4 is TRUE.Correct answer: (2,5)
Factor the polynomial. 54c 3d 4 + 9c 4d 2 A. 9c 3d 2(d 2 + 6c) B. 9c 3d 2(6d 2 + c) C. 9c 4d 2(d 2 + 6) D. 9c 4d 2(6d 2 + 1)
Answers
= 9c^3d^2 (6d^2 + c)
answer is B. 9c^3d^2 (6d^2 + c)
simplify the expression 3x^2(x^2-4x-2)+(5x^3+7x^2+2x+11)
Answers
You roll two dice, what is the probability of rolling two even numbers?
Answers
The probability of rolling an even number on the first dice is also 1/2 (3/6)
So the probability of getting two even numbers on both dice is 1/2*1/2=1/4
The maximum value of f(x) = 2x^3 - 18x^2 + 48x - 1 on the interval [0, 3] is (4 points)
-1
39
35
71
Answers
A function assigns the values. The maximum value of f(x) = 2x^3 - 18x^2 + 48x - 1 on the interval [0, 3] is 39. thus, the correct option is B.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
To find the point at which the function has the maximum value we need to differentiate the function. Therefore, the function can be written as,
[tex]f(x) = 2x^3 - 18x^2 + 48x - 1 \\\\\dfrac{d}{dx}f(x) = \dfrac{d}{dx}(2x^3 - 18x^2 + 48x - 1)\\\\f' = 6x^2-36x+48[/tex]
Equate the function with zero to know at what value of x the function returns a maximum value.
6x² - 36x + 48 = 0
x² - 6x + 8 = 0
x² -2x -4x +8 = 0
(x-2)(x-4)=0
Since we want to the value in the interval of 0 to 3, therefore, 2 is the value at which the function will have its maximum value.
f(2) = 2(2)³ - 18(2)² + 48(2) - 1
f(2) = 39
Hence, The maximum value of f(x) = 2x^3 - 18x^2 + 48x - 1 on the interval [0, 3] is 39. thus, the correct option is B.
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To find the maximum value of the function f(x) = 2x^3 - 18x^2 + 48x - 1 on the interval [0, 3], locate the critical points and evaluate the function at the critical points and endpoints. The maximum value is 71.
Explanation:To find the maximum value of the function f(x) = 2x^3 - 18x^2 + 48x - 1 on the interval [0, 3], we need to locate the critical points and the endpoints of the interval. First, find the derivative of the function: f'(x) = 6x^2 - 36x + 48. Set the derivative equal to zero and solve for x to find the critical points. Then evaluate the function at the critical points and the endpoints to find the maximum value.
The critical points are x = 1 and x = 4. Evaluating the function at these points: f(1) = -7 and f(4) = 71. Evaluating the function at the endpoints of the interval: f(0) = -1 and f(3) = 35. The largest value is 71, so the maximum value of f(x) on the interval [0, 3] is 71.
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