The mean for the number of students who work full-time in
samples of size 16 are 3.5.
What is the expected value?We understand The expected value, also known as the expected average in the field of probability theory, is a generalization of the weighted average.
Given, 22% of all students work full-time, per a college poll.
Now, If we choose a sample of 16 students the mean number of students working full-time is,
= 16(22/100)
= 16×0.22
= 3.5.
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There are 9 times as many strawberries as plums in a fruit basket. What is the ratio of the number of plums to the total number of strawberries and plums.
Answer:
Below
Step-by-step explanation:
strawberries to plums 9:1 then total would be 10 parts of which 1 is plums so 1 : 10
A 6
6
-foot ribbon is cut into 4
4
equal pieces.
Which equation shows how to find the length of each piece?
The equation shows how to find the length of each piece is L = R / N and the length of each piece is 1.5 feet.
To find the length of each piece, we can use the following equation:
Length of each piece = Total length of the ribbon / Number of pieces
In mathematical terms, we can represent this equation as:
L = R / N
Where,
L is the length of each piece
R is the total length of the ribbon (66 feet in this case)
N is the number of pieces (44 in this case)
In this problem, we are given a 66-foot ribbon and we are asked to cut it into 44 equal pieces. We need to find out the length of each piece.
Using this equation, we can easily find the length of each piece:
L = 66 / 44
L = 1.5 feet
Therefore, each piece of the ribbon is 1.5 feet long.
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a farmer, cole, who is 6 feet tall, wants to determine the height of his barn. cole notices that his shadow is 14 feet long. the shadow cast by his barn is 70 feet long. how tall is the barn?
The barn with shadow height, 70 feet, having the the height which is equals to the 30 feet, that is barn is 30 feet tall.
The height of farmer Cole = 6 feet
The height of shadow of farmer Cole = 14 feet
The height of shadow of barn = 70 feet
Let the height of barn be ' x feet '. We have to determine the value of x. Now, we the above figure, AB and CD represents height of barn and Cole respectively. Similarly BE and CE represent the shadow height of barn and Cole respectively.
Let angle BAE made here be equals to θ. Also angle BAE = angle CDE = θ. Now, consider right angled triangle, CDE with sides. Using triganomertric functions, tanθ = height/base
=> tanθ = CE/CD = 14/6
simplify, tanθ = 7/3 --(1)
Also, consider right angled triangle ABE,
tanθ = height/base = BE/AB
=> tanθ = 70 / x
=> x tanθ = 70
from equation (1), x (7/3) = 70
=> 7x/3 = 70
=> 7x = 210
=> x = 210/7
=> x = 30
Hence, required value of x is 30 feet.
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If m∠HZJ = 38°, what is m∠FZG
Answer: 38 degrees
Step-by-step explanation:
HZJ and FZG are congruent angles so then that means that they are the same 38 degrees.
A bag contains 2 red marbles and 3 black marbles. If Abby picks a marble without looking, returns it to the bag, and then draws a second marble, what is the probability that both marbles are red? Write your answer as a fraction.
Answer:
hope this helps!
Step-by-step explanation:
question 10
What is the length of segment LN?
21.93
27.57
30.36
55.14
Can some one help sovle this?
-
By using the graph of the piecewise function we can see that:
f(0) = 0.
How to find the value of f(0)?Here we have the graph of a piecewise function, and we want to find the function when x = 0.
Remember that on a graph, an open circle means that the value does not belong to the graph, while a closed circle means taht the value belongs to the graph.
Here we can see that the closed circle at x = 0 is on the line at the middle, then we can conclude that f(0) = 0.
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Cameron has a bag of 24 letter tiles. Some are vowles and some are consonants. He randomly chooses a letter tile and places it back in the bag. He chose 4 vowels and 2 consonants. How many vowels are likely in the bag?
In all, Cameron removed 6 tiles (3 consonant vowels and 4 vowel consonants). Take that amount, 6, then divide it by the 24 vowels in total. 24/6=4. It provides you four. Then you multiply that number, 4, by the number of consonant vowels he removed, which is 3, for a total of 6, or 4*2. your response is six vowels.
The five distinct vowel letters are A, E, I, O, and U. The English language has vowels in practically every word and phrase, making them incredibly prevalent. Any letter of the alphabet that isn't a vowel is referred to as a consonant (a, e, i, o, u).All of the non-vowel sounds in the English alphabet are consonants. Vowels, the loud sounds that make up each syllable's core and are separated by consonants. Letters A and O stand in for vowels, whereas B, C, D, F, J, K, M, N, P, Q, S, T, V, X, and Z stand in for consonants.
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Solve: s=4+sqrrt s+2
s = 2
s = 7
s = 2 or s = 7
no real solution
There is no real solution to the given equation s = 4 + sqrt(s+2) with value of s = 2, s = 7, s = 2 or s = 7.
To solve the equation:
s = 4 + sqrt(s+2)
We can start by isolating the square root term on one side:
s - 4 = sqrt(s+2)
Then, we can square both sides to eliminate the square root:
(s - 4)^2 = s + 2
Expanding the left side:
s^2 - 8s + 16 = s + 2
Bringing all terms to one side:
s^2 - 9s + 14 = 0
We can solve for s using the quadratic formula:
s = (9 ± sqrt(9^2 - 4(1)(14))) / 2(1)
s = (9 ± sqrt(49)) / 2
s = (9 ± 7) / 2
So the two possible solutions are:
s = 8/2 = 4
s = 2/2 = 1
However, we need to check if these solutions satisfy the original equation.
If we plug s=4 into the equation, we get:
4 = 4 + sqrt(4+2)
4 = 4 + sqrt(6)
This is not true, since the right-hand side is greater than the left-hand side.
If we plug s=1 into the equation, we get:
1 = 4 + sqrt(1+2)
1 = 4 + sqrt(3)
This is also not true.
Therefore, there is no real solution to the equation s = 4 + sqrt(s+2).
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Answer:
B
Step-by-step explanation:
One angle of an isosceles triangle measures 140°. What measures are possible for the other two angles? 28? 22? 26? 20?
The measures of angle possible for of an isosceles triangle when one angle given is 140° then other two angles is 20°.
In an isosceles triangle, two of the angles have the same measure. Let's call this measure x. Since the sum of the angles of a triangle is 180 degrees, we can set up an equation:
x + x + 140° = 180°
Simplifying the equation, we get:
2x + 140° = 180°
Subtracting 140° from both sides, we get:
2x = 40°
Dividing both sides by 2, we get:
x = 20°
So the other two angles in the isosceles triangle each measure:
x = 20°
Therefore, the measures 28°, 22°, 26° are not possible for the other two angles of the isosceles triangle, but the measure 20° degrees is possible.
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If an 8-pound turkey takes 150
minutes to cook, how long would
it take a 16-pound turkey to cook?
_____ minutes
Answer:
just 150x2 = 300 minutes or just 150 minutes to cook
Step-by-step explanation:
The cooking time of a turkey depends on its weight, so a 16-pound turkey will take longer to cook than an 8-pound turkey. However, without additional information such as the cooking method, temperature, and the shape and size of the turkeys, it's not possible to determine the exact cooking time for the 16-pound turkey.
Find a polynomial function of degree 3 such that f(10)=17 and the zeros of f are 0, 5 and 8
Please help giving brainliest answer
To find a polynomial function of degree 3 such that f(10) = 17 and the zeros of f are 0, 5, and 8, we can use the factored form of the polynomial. The polynomial can be written as f(x) = (17/20)x(x - 5)(x - 8).
If the zeros of a polynomial function are 0, 5, and 8, then the factored form of the polynomial can be written as: f(x) = k(x - 0)(x - 5)(x - 8)
To find a polynomial function of degree 3 such that f(10) = 17 and the zeros of f are 0, 5, and 8, we can use the factored form of a polynomial. The factored form of a polynomial is the product of its factors, which are its linear binomials that correspond to its zeros.
For example, if a polynomial has zeros of 1, 2, and 3, then its factored form can be written as (x - 1)(x - 2)(x - 3). We can use this concept to find the factored form of the polynomial with zeros of 0, 5, and 8, which is:
f(x) = k(x - 0)(x - 5)(x - 8)
where k is a constant coefficient that we need to determine. We can use the given condition that f(10) = 17 to solve for k. When we plug in x = 10, we get:
f(10) = k(10 - 0)(10 - 5)(10 - 8) = 2k * 5 * 2 = 20k
Since f(10) = 17, we can set 20k = 17 and solve for k:
k = 17/20
Therefore, the polynomial function of degree 3 with the given conditions is:f(x) = (17/20)x(x - 5)(x - 8)
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In a group of 62 people 27 like cold tea while 42 like hot tea how many people like neither of the two
jack bought a bike that was 35% off the original price let p represent the original price. what expressions can be used to calulate the sale price
The expression used to calculate the sale price is given as follows:
S(p) = 0.65p.
How to obtain the sale price?The expression used to calculate the sale price is obtained applying the proportions in the context of the problem.
The price was 35% off, meaning that there was a discount of 35%, meaning that a percentage of 100 - 35 = 65% of the total price was paid, hence the expression used to calculate the sale price is given as follows:
S(p) = 0.65p.
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Find the area of the shaded region in each of the following figures:
The area of the shaded region in each of the following figures are the same, that is, 94.5cm²
(i) Area of the shaded region in the first figure:
= (Area of the square with side 21m) - (Area of the circle with diameter 21m)
we know the diameter of the circle is 21 cm, therefore we can say that the radius of the circle is 10.5 cm
we need to find the area of the shaded region = (21 × 21)
([tex]\frac{22}{7}[/tex]×[tex]\frac{21}{2}[/tex]×[tex]\frac{21}{2}[/tex]) cm² = 441 - 346.5
= 94.5cm²
(ii) Area of the shaded region in the second figure:
(Area of the square with side 21 cm) - (4×Area of the sector)
= (21 - 21) - (4×[tex]\frac{90}{360}[/tex]×[tex]\frac{22}{7}[/tex]×[tex]\frac{21}{2}[/tex]×[tex]\frac{21}{2}[/tex])
(21 - 21) = (4 - [tex]\frac{1}{4}[/tex]×[tex]\frac{22}{7}[/tex]×[tex]\frac{21}{2}[/tex]×[tex]\frac{21}{2}[/tex])
= (441−346.5) cm²
=94.5 cm²
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An herbalist has 15 oz of herbs costing $3 per ounce. How many ounces of herbs costing $2 per ounce should be mixed with these 15 oz of herbs to produce a mixture costing $2.50 per ounce?
15 ounces of herbs should be mixed to produce a mixture of costing $2.50 per ounce.
What is meant by addition?
In mathematics, addition is the process of fusing two or more integers. The numbers being added are known as addends, while the outcome of the addition process, or the final response, is known as the sum. It is one of the fundamental mathematical operations we employ on a daily basis. We add numbers in many different contexts.
Given that, an herbalist has 15 ounces of herbs costing $3 per ounce.
Let the ounces of herbs costing $2 per ounce that should be added to the above herbs be 'x'
Cost of total mixture is 15*3 + x*2 = (x+15)*2.5
15*(3-2.5) = x*(2.5-2)
15*0.5 = x*0.5
x = 15
Therefore, 15 oz of herbs for $2 should be added.
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A new image that is formed after a transformation is called an ________
A new image that is formed after a transformation is called reflection.
What is a reflection?A sort of symmetry known as reflective symmetry occurs when one half of an object mirrors the other half. For instance, both the left and right sides of a human face are typically the same. Most butterflies have identical wings on their left and right sides.
From the question, it is asked what we call a new image that is formed after a transformation. Reflection is the name given to the new picture that results from a change.
Therefore, the new image will be called a reflection after transformation.
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Why the probability of the union of two events occurring can never be more than the probability of the intersection of two events occurring.
The statement "the probability of the union of two events occurring can never be more than the probability of the intersection of two events occurring." is false.
What is meant by probability?
The probability of an occurrence is a figure that represents how likely it is that the event will take place. In terms of percentage notation, it is expressed as a number between 0 and 1, or between 0% and 100%. The higher the likelihood, the more likely it is that the event will take place.
The given statement is:
"the probability of the union of two events occurring can never be more than the probability of the intersection of two events occurring."
This is a false statement.
The probability of the union of two events is the probability of individual events without considering the probability of the intersection of the events.
When the events do not have an intersection, then the probability of a union of events is greater than the probability of an intersection of events.
The chance of both occurrences occurring together is given by the union of two events, but the probability of both events occurring simultaneously is given by the intersection of two events, which is smaller than probability of union of events.
Therefore the statement "the probability of the union of two events occurring can never be more than the probability of the intersection of two events occurring." is false.
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3. The scatter plot represents the age x of a driver in years and the monthly cost of insurance y
in dollars for a specific car model. The equation of the line of best fit for this data is
y=474.34-7.445x
Cost (dollars)
A
350
300
250
200
150
100
50
increases
decreases
0
5
10
Monthly Auto Insurance Costs
Write the values that complete each sentence.
Part A
The slope of the line of best fit is
The y-intercept of the line of best fit is
Part B
Circle an answer choice in each box to make each statement true.
The slope of the line of best fit means that as the age of the driver (A), the predicted monthly
cost of insurance (B)
B
15
20
Age of Driver (years)
The value of the y-intercept (C) make sense in this context. The predicted monthly cost of
surance for a driver who is 0 years old (D) possible for this situation.
25
decreases
30
increases
stays the same
35
does
40
does not
D
is
is not
NEED HELP NOWWWWW
€-grade10
mathematics
Answer:
29/5
Step-by-step explanation:
hope this helps
A picture 6 1/2 feet long is to be centered on a wall that is 21 feet long. How much space is there from edge of the wall to the picture
On solving the provided question, we can say that by fractions, the space from the edge of the wall to the picture = 17/4*1/2 = 17/8
what is fraction?Any number of equal portions, or fractions, can be used to represent a whole. Fractions in standard English indicate how many units of a certain size there are. 8, 3/4. A whole includes fractions. The ratio of the numerator to the denominator is how numbers are expressed in mathematics. Each of these is an integer in simple fractions. In the numerator or denominator of a complex fraction is a fraction. True fractions have numerators that are less than their denominators. A fraction is a sum that constitutes a portion of a total. By breaking the entire up into smaller bits, you can evaluate it. Half of a full number or item, for instance, is represented as 12.
Simply subtract the length of the image from the length of the wall to get the total area below and above the picture from the edge of the wall. So.
[tex]14\frac{1}{2} - 10\frac{1}{4}[/tex]
29/2 - 41/2
17/2
the space from the edge of the wall to the picture = 17/4*1/2 = 17/8
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Four friends plan to rent a car to go on a camping trip. At the campground the friends sign up to go on a mountain bike tour
The algebraic expression G x C, where G represents the total number of gallons needed and C represents the cost per gallon.
In mathematics, an expression is a combination of one or more numbers, variables, and/or operators that represent a quantity or a mathematical relationship.
To calculate the total cost of gasoline, we first need to determine how many gallons of gasoline will be needed for the entire trip. This can be done by dividing the total distance traveled by the car's miles per gallon (MPG) rating. Let's use "G" to represent the total number of gallons needed.
G = Total Distance Traveled / MPG
To find the total cost of gasoline, we can multiply the number of gallons needed by the cost per gallon. Let's use "T" to represent the total cost of gasoline.
T = G x C
Using the expression we developed earlier, we can now find the total cost of gasoline for the full-size car:
=> T = G x C
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Complete Question:
Four friends plan to rent a car to go on a camping trip. They will drive a total of 450 miles. The cost of gasoline is $2.20 per gallon Type of Car SUV Full size Compact Rental Cost $283 $215 $183 Insurance Cost $120 $108 $95 Miles per Gallon 24 25 33 Total Gas Cost $ $ $ Cost per Person.
Write an algebraic expression for the total cost of the gasoline.
(5×-1)(6×2+3×+8) box method
The final result is: 30x^3 - 6x^2 + 15x^2 - 3x + 40x - 8 = 30x^3 + 9x^2 + 40x - 8
What is the Box method?The box method, also known as the FOIL method, is a way of multiplying two polynomials by using the distributive property.
Given the expression (5x - 1)(6x^2 + 3x + 8), we can use the box method to multiply the terms as follows:
First terms: (5x - 1) * 6x^2 = 30x^3 - 6x^2Outer terms: (5x - 1) * 3x = 15x^2 - 3xInner terms: (5x - 1) * 8 = 40x - 8Last terms: (5x - 1) * 8 = 8Therefore., the final result is:
30x^3 - 6x^2 + 15x^2 - 3x + 40x - 8 = 30x^3 + 9x^2 + 40x - 8
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Newington Town Manager Tanya Lane proposed a $124.2 million budget Monday night -- a 4.7 percent increase over the previous year." [R141] What was Newington's budget in the "previous year"?
Newington's budget in the "previous year" is $119.2 million
The term "budget" refers to a financial plan for a given period that outlines expected expenses and revenues. The previous year's budget for Newington is the financial plan that the town had for the previous fiscal year.
Assuming the previous year's budget refers to the fiscal year that ended just before the current fiscal year, we can find the amount by looking at the town's financial statements for that period. These statements will show the town's revenues and expenses for that fiscal year, and the difference between the two will be the budget.
If the town had $100 million in revenues and $95 million in expenses in the previous fiscal year, then the budget for that year would be $5 million. This means that the proposed $124.2 million budget for the upcoming year is a 4.7% increase from the $119.2 million budget of the previous year.
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What are the zeros and a -intercepts for the function below?
f(x) = 2x² + 14x + 20
Step-by-step explanation:
the zeros are the x-intercepts. because these are x values, when y (= f(x)) = 0.
a quadratic equation has 2 zeros (even if they are equal or complex numbers).
a quadratic equation
ax² + bx + c = 0
can always be solved by
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
x = (-14 ± sqrt(14² - 4×2×20))/(2×2) =
= (-14 ± sqrt(196 - 160))/4 =
= (-14 ± sqrt(36))/4 = (-14 ± 6)/4
x1 = (-14 + 6)/4 = -8/4 = -2
x2 = (-14 - 6)/4 = -20/4 = -5
these are the 2 zeros (x-intercepts).
if you need the explicit points :
(-5, 0) and (-2, 0)
the y-intercept is the y-value when x = 0
y = 2×0² + 14×0 + 20 = 20
the explicit point : (0, 20)
pls help will give brainliest??
which statement best describes the association between variable X and Y?
you do not give the answer choice in this picture, but I assume it is along the lines of this
The scatter plot shows a negative association between variable X and Y
Select the angle that correctly completes the law of cosines for this triangle.
82 +1722(8) (17)cos ____ = 15²
-
28°
17
15
62°
90°
8
The angle that completes the law of cosines is 62°.
Option D is the correct answer.
What are trigonometric identities?There are three commonly used trigonometric identities.
Sin x = 1/ cosec x
Cos x = 1/ sec x
Tan x = 1/ cot x or sin x / cos x
Cot x = cos x / sin x
We have,
The law of cosines in a triangle states that,
c² = a² + b² - 2ab cos C
Where c is the side opposite to ∠C.
Similarly,
a² = b² + c² - 2bc cos A
b² = a² + c² - 2ac cos B
Now,
289 + 64 - 272 cos __ = 15²
17² + 8² - 2 x 17 x 8 cos 62 = 15²
289 + 64 - 272 cos 62 = 15²
Thus,
The angle that completes the law of cosines is 62°.
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The complete question.
289 + 64 - 272 cos __ = 15²
Find the value that makes the proportion true
5/6= ?/180
Answer:
150
Step-by-step explanation:
5/6= ?/180
We can use cross-products to solve.
5 * 180 = 6 * ?
Divide each side by 6.
5 * 180/6 = ?
5 * 30 = ?
150
The missing number is 150.
Answer:
150/180
Step-by-step explanation:
Solution by Cross Multiplication;
The equation:
[tex]\frac{5}{6} = \frac{x}{180}[/tex]
The cross-product is:
5(180) = 6(x)
Solving for x:
x = [tex]\frac{5(180)}{6} \\[/tex]
x = 150
3. find the 95% confidence interval for the mean number of hours of tv watched each day by adults in the us. report the upper and lower bounds of the interval:
The lower and upper bounds of the given confidence interval of 95% with sample size= 1,555 , sample mean = 2.938 and standard deviation 2.837 is equal to ( 2.797 , 3.079 ).
Upper and lower bounds of the confidence interval is :
= Sample mean ± Margin of error
And Margin of error is :
= Z-critical × ( σ/√(n ) )
Standard deviation 'σ ' = 2.837
Sample size 'n' = 1,555
Sample mean 'μ' = 2.938
Z-critical for 95% confidence interval
= Zα/2
= 1.96
Margin of error
= 1.96 × (2.837/√1,555)
= 1.96 × (2.837/ 39.43 )
= 0.1410
Confidence interval:
Upper boundary
= 2.938 + 0.1410
= 3.079
Lower boundary
= 2.938 - 0.1410
= 2.797
Therefore, for the given confidence interval of 95% the lower and upper bounds of the interval are ( 2.797 , 3.079 ).
The above question is incomplete , the complete question is:
find the 95% confidence interval for the mean number of hours of tv watched each day by adults in the us. report the upper and lower bounds of the interval:
Sample size Sample mean Standard deviation
1,555 2.938 2.837
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For a game you roll a dice. If you get a 1-3 you get nothing.
If you get 4 or 5 you break even and if you roll a 6 you win
$20. If the game costs $5 to play what is the expected value
For a game you have a 15% chance to get nothing a 25%
Is that all of the question?
