Steve has three quarters, three nickels and three pennies. if Steve selects three coins at random and without replacement, then the probability that the total value is exactly 35 cents is 0.107.
Probability:
Probability is the branch of mathematics that deals with numerical descriptions of the likelihood of an event occurring or the likelihood of a statement being true. Probability is a number between 0 and 1, with 0 generally indicating impossibility and 1 indicating certainty that an event will occur. A simple example is tossing a fair (unbiased) coin. Since the coin is fair, the two outcomes (heads and tails) are equally likely. The probability of heads is the same as the probability of tails. Since no other outcome is possible, the probability of heads or tails is 1/2.
Probability without Replacement:
Probability without replacement means that once you draw an item, you don't put it back into sample space before drawing a second item. In other words, an item cannot be drawn more than once. For example, if he takes one candy out of a box containing nine candies and does not replace the first one, he takes the second one. Of course, the rehearsal room for the second event no longer stays at 9 because we didn't replace the first candy. So the second event has a sample space of 8. That is, the sample space of the second event has changed.
According to the Question:
The only way you can get 35 cents is with 1 quarter and 2 nickels
There are 3 ways to pick up a quarter ³C₁
and there are 3 ways you can pick up 2 nickels : ³C₁
Thus,
There are 3× 3 = 9 ways to choose 1 quarters and 2 nickels.
That is 9 favorable outcome.
Now,
there are ⁹C₃ = 84 ways to choose 3 coins from 9
Therefore,
the probability of picking up 35c is
9/84
= 3/28
= 0.107
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n - 22 = 4 what is the answer in verbal expression
HELP I ONLY HAVE TELL 12 QUICK I HAVE OTHER QUIZZES TOO
Answer:
by 5
Step-by-step explanation:
Answer: 5
Step-by-step explanation:
The ratios from parts A and B are equivalent. Write an equation by setting the ratios equal to one another.
Answer:
the solution is 9/2 = X24
a rectangular box with a square base is made from 216 ft2 of material. which dimensions will result in a box with the largest possible volume?
height = 14.5 ft and width = length = 3.2 ft in a box with the largest possible volume
Let the side of the square base is a and the height of the box is h.
The material required to make the box is equal to the total surface area of the box.
Area of base = a²
Cost of square base is $ 2 per ft²
So, the cost of making base = 2a²
Area of four walls + area of top = 2 (a² + ah + ah) + a² = 3a² + 2ah
Cost of making walls and the top is $ 1 per ft²
So, the cost of making walls and the top = 1 x ( 3a² + 2ah)
Total cost of making the box = 2a² + 3a² + 2ah = 5a² + 2ah
According to the question
144 = 5a² + 2ah
.... (1)
The volume of the box is V = length x width x height
V = a x a x h
V = 72 a - 2.5 a³ from equation (1)
Differentiate both sides with respect to a.
dV/da = 72 - 7.5 a²
Put, it equal to zero for maxima and minima
7.5 a² = 72
a = 3.2 ft
Put in equation (1)
h = 14.5 ft
So, the dimensions of the box are
height = 14.5 ft
width = length = 3.2 ft
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An online music store charges $1.25 for each song after you pay a $25 subscription fee. write a function that represents the arithmetic sequence. how many songs
can you buy if you have $57 to spend?
Jolon drew the figure that is shown below.
mc005-1 ( the graph see picture )
Jolon translated the figure left 5 units and down 4 units. What are the new coordinates of point C?
(–4, 0)
(0, 0)
(0, –3)
(1, –4)
Answer:
(0,-3)
Step-by-step explanation:
C( 5,1)
5 is the horizontal value. It is the distance from zero. If we go 5 units left we will be at 0
1 is the vertical value. Is is the distance above the x axis. If we go down 4 units, we will be at -3
(0,-3)
consider a qubit to be in the state . what is the probability to find the spin projection along the x-axis (corresponding operator ) to be 1 ?
The probability to find the spin projection along the x-axis to be 1 is 0.5. The operator corresponding to the spin projection along the x-axis is X, and the expectation value of X in this state is 0.
This result is a consequence of the fact that operator X is a Hermitian operator, which means that its eigenvalues are real. The eigenvalues of X are ±1, so the probability of measuring a spin projection of 1 is ½. This is because the eigenstate corresponding to the eigenvalue 1 is |+⟩, which is a superposition of |0⟩ and |1⟩.
Similarly, the eigenstate corresponding to the eigenvalue -1 is |-⟩, which is also a superposition of |0⟩ and |1⟩. Thus, the qubit is equally likely to be found in either the |+⟩ or the |-⟩ state, and so the probability of measuring a spin projection of 1 is 0.5.
In summary, since the qubit is in a superposition of the two computational basis states, the expectation value of any Hermitian operator is 0, and the probability of measuring a spin projection of 1 is 0.5.
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please help will give brianliest The point (–3, –2) is a solution to 2(x + 1) > 3y – 2. True False
Answer:
True
Step-by-step explanation:
(3,2) is a solution to the equationExplanation:If (3 ,2) is a solution then it must 'satisfy' the equation. That is make it True.To determine this, substitute x = 3 and y = 2 into the left side of the equation and if the result is 12 then it is a solution.⇒(2×3)+(3×2)=6+6=12LHS = RHS hence (3,2) is a solution
Which of the following relations is a function?
A.
(3, 4), (-5, 6), (3, 3), (-8, 2)
B.
(3, 0), (-5, 3), (5, 1), (-5, 5)
C.
(5, 1), (-5, 4), (3, 1), (5, 2)
D.
(3, 4), (-5, 2), (5, 1), (-8, 2)
The relation in this problem that is a function is given as follows:
D. (3, 4), (-5, 2), (5, 1), (-8, 2).
When does a relationship represents a function?To verify whether a relation represents a function, we need to observe if each input is mapped to only one output.
The relationships that are not functions in this problem, along with the justification, are given as follows:
Relationship A: Input 3 is mapped to multiple outputs, 4 and 3.Relationship B: Input -5 is mapped to multiple outputs, 3 and 5.Relationship C: Input 5 is mapped to multiple outputs, 1 and 2.Hence the relationship that is a function is given by option D, as the inputs 3, -5, 5 and -8 are each mapped to a single output.
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Last season , the Roswell hornets out scored their opponents 5:2 if their opponents scored 28 points , how many points did the hornets score ?
The hornets scored 70 points if they scored 5:2 when their opponents scored 28 points.
Therefore the answer is 70.
If the Roswell hornets outscored their opponents 5:2, this means that for every 5 points the hornets scored, their opponents scored 2 points.
If we know that the opponents scored 28 points, we can use this information to find out how many points the hornets scored.
We can set up the equation:
x/28 = 5/2
Where x is the number of points the hornets scored.
On solving the equation we get:
x = (5 × 28)/2
x = 5 × 14
x = 70
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a nutritionist believes that 10% of teenagers eat cereal for breakfast. to investigate this claim, she selects a random sample of 150 teenagers and finds that 25 eat cereal for breakfast. she would like to know if the data provide convincing evidence that the true proportion of teenagers who eat cereal for breakfast differs from 10%. what are the values of the test statistic and p-value for this test?
On solving the provided question, we can say that random sample the conditions for interference are met.
what is random sample?selected at random (purely random, unpredictable). Every member of the population being polled ought to have an equal probability of getting chosen. She randomly selected 25 names from a pool of 250 employees as an example of a simple random sample. Since there are 250 of her employees in total, and each one has an equal probability of being chosen, the sample in this instance is random. Using simple random sampling, which is a form of probability sampling, researchers choose individuals at random from a population. There is an equal opportunity for selection for every person in the population.
Yes, the conditions for interference are met.
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PLEASE HELPPPP!!! (-2/3)^4 evaluate.
(-2/3)^4 evaluates to (1/81) or 0.012345679012345678.
suppose you want to estimate the percentage of college studentswho are using electronic cigarettes on a regular basis. you have permission to sample two colleges, grove city college and penn state university. grove city has an enrollment of 2,500 students and penn state has an enrollment of 45,000 students. what should the relative size of our samples be from each school if we want the two sampling distributions to have approximately the same standard deviation?
The correct option is A "Because the population sizes are so different, it's impossible to make the standard deviations equal by adjusting the two sample sizes ".
The collection of data is gathered and chosen from a statistical population with the use of some prescribed techniques in both statistics and quantitative methodology. Data sets may be divided into two categories: sample and population.
All the components of the data set are included in the population, which also contains quantifiable qualities like mean and standard deviation.
A sample is made up of one or more observations that are taken from the population, and a statistic is what makes a sample quantifiable. The act of sampling is the selection of a sample from a population.
Complete question:
Suppose you want to estimate the percentage of college students who are using electronic cigarettes on a regular basis. You have permission to sample two colleges, Grove City College and Penn State University. Grove City has an enrollment of 2,500 students and Penn State has an enrollment of 45,000 students. What should the relative size of our samples be from each school if we want the two sampling distributions to have approximately the same standard deviation?
A. Because the population sizes are so different, it's impossible to make the standard deviations equal by adjusting the two sample sizes
B. We should take a larger number of Penn State students since there are more of them.
C. We should take a larger number of Grove City students since there are fewer of them.
D. We should take the same size samples from each school.
E. We should take samples that are exactly 10% of each school's enrollment.
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What is the difference between the best and worst credit score interest rates?
The difference between the best and worst credit score interest rates would be = 6.24%
What is an interest rate?An interest rate is defined as the particular amount of money an individual receives for a period of time due to an investment made.
The difference between the best and the worst credit score interest rates would be to substrate the best score from the worst score.
The best interest rate score = 3.65
The worst interest rate score = 9.89
Therefore the difference = 9.89 - 3.65 = 6.24 %
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write an equation that represents how many grams of flour we need (fff) for some number of grams of sugar (sss).
We need 600 grams of flour to make the recipe with 400 grams of sugar.
What is a ratio?
A ratio is a mathematical comparison of two or more values or quantities. It is represented as a fraction, with the numerator representing the first value or quantity and the denominator representing the second value or quantity.
An equation is a mathematical statement that asserts the equality of two expressions. In this case, the recipe uses 300 grams of flour for every 200 grams of sugar. To write an equation that represents this relationship, we can use the variable "f" to represent the number of grams of flour and "s" to represent the number of grams of sugar.
The equation that represents this relationship is f = (3/2)s. The coefficient of the "s" variable is 3/2, which represents the ratio of flour to sugar in the recipe (3 parts flour to 2 parts sugar). This equation states that the number of grams of flour, represented by f, is equal to 3/2 times the number of grams of sugar, represented by s.
So, in other words, if we know the number of grams of sugar we need, we can use this equation to find out how many grams of flour we need. For example, if we need 400 grams of sugar, we can substitute that into the equation:
f = (3/2)s
f = (3/2) * 400
f = 600
Hence, We need 600 grams of flour to make the recipe with 400 grams of sugar.
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Answer and explaining
Answer:
a
Step-by-step explanation:
i just took it
1. The hypotenuse of a right triangle has length of 34cm. The sum of the lengths of the other two legs is 46cm. What are their lengths?
The length of the other two sides are 16 and 30.
What is right-angle triangle ?
A right triangle is a triangle with one angle at a right angle, meaning that two of its sides are perpendicular. It is also known as a right-angled triangle, an orthogonal triangle, or more commonly as a rectangled triangle. Trigonometry's foundation is the right triangle's relationship between its sides and other angles.
If one of the triangle's angles is 90 degrees, the triangle is said to be right-angled. 90 degrees is the sum of the other two angles. Perpendicular and the triangle's base make up the sides that the right angle is formed from. The hypotenuse, or third side, is the longest of the three. It is also known as the hypotenuse.
let one angle be x
the other angle be 46-x
as the sum of the angles is 46
x² + (46-x)² = 34²
2x² - 92x + 46² - 34² = 0
x² - 46x + 480 = 0
x² - 16x - 30x + 480 = 0
x(x-16) - 30 (x - 16) = 0
(x-30)(x-16) = 0
x = 30 or x = 16
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Which graph represents the function of f(x) =9x²-36/3x +6
The graph is a right line that intercepts the y-axis at - 6 and the x-axis at x = 2, excluding x = -2. That is the second graph of the second picture gives the graph of the function.
What is y-intercept?The point at which a graph crosses the y-axis is known as the y-intercept. It is, in other words, the value of y when "(x=0)" occurs. Using the slope and a specified location, determine the y-intercept of a linear function.
Determine the graph's gradient and a point first. Enter a linear equation in slope-intercept form (y = mx + b) once this is finished. Rewrite the equation using the supplied point (x, y) and slope (m), inserting the correct values for x, y, and m.
The function is:
f(x) = (9x^2 - 36)/3x + 6
Simplify that function to a linear function for all x for which 3x + 6 ≠ 0
3x = - 6
x = -2
So, for x ≠ - 2, you can do:
f(x) = (9x^2 - 36) / 3x + 6
f(x) = 9(x^2 - 4) / 3x + 6
f(x) = 3(x + 2)(x - 2) / x+2
f(x) = 3(x - 2) = 3x - 6
Hence, the graph is a right line that intercepts the y-axis at - 6 and the x-axis at x = 2, excluding x = -2. That is the second graph of the second picture.
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An airplane is preparing to land at an airport. It is 45,600 feet above the ground and is descending at the rate of 3,200 feet per minute. At the same airport, another airplane is taking off and will ascend at the rate of 2,500 feet per minute. When will the two airplanes be at the same altitude and what will that altitude be?
Answer:
8 mins 20000feet
Step-by-step explanation:
let mins be x
45600-3200x = 2500x
so 45600= 5700
x=8
2500*8 = 20000
In the given figure, △ADE ∼ △ABC. Which triangle similarity theorem justifies
this similarity? Show proof toyour answer.
a. Using the figure below, name the three similar triangles.
b. Write the proportions that exist among corresponding parts of similar
By similarity theorem The three similar triangles are △CLB~△LUB~△CUL
(B) The proportions in corresponding parts of similar are in △CLB~△LUB: CL/LU=LB/UB=CB/LB and in △CLB~△CUL:CL/CU=LB/UL=CB/CL
What is similarity theorem?Triangle similarity in Euclidean geometry. According to the fundamental theorem of similarity, a line segment can divide two triangle sides into proportionate segments if and only if it is parallel to the third side of the triangle.
In the given figure, △ADE~△ABC.
1. ∠D≅∠B
2. DE II BC converse of basic proportionality
3. ∠E ≅ ∠C corresponding angle are congruent
4. ∠DAE≅∠BAC reflexive property
5. △ADE ≅△ABC (AAA similarity theorem)
The three similar triangles are-
△CLB~△LUB~△CUL
The proportions that exist among corresponding parts of similar
→ In △CLB~△LUB
CL/LU=LB/UB=CB/LB
→ In △CLB~△CUL
CL/CU=LB/UL=CB/CL
→ In △LUB~△CUL
LU/CU=UB/UL=LB/CL
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(2^-3x divided by 2^-2)^2=2^10
.
Greetings!!
Lool at the attachment
the expression $x^2 3x - 28$ can be written as $(x a)(x - b),$ and the expression $x^2 - 10x - 56$ written as $(x 2b)(x c)$, where $a$, $b$, and $c$ are integers such that $c > 0.$ what is the value of $2c - a$?
The required value of the expression 2c - a is 1.
What is an expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement.
It's possible to multiply, divide, add, or subtract with this mathematical operation.
An expression's structure is as follows: Expression: (Math Operator, Number/Variable, Math Operator)
An expression in mathematics is made up of numbers, variables, and functions (such as addition, subtraction, multiplication or division, etc.)
So, we have:
x²+3x-28
x²+7x-4x-28 [28=7×2×2, 7-(2×2)=7-4=3]
x(x+7)-4(x+7)
(x+7)(x-4)$
In light of the fact that x2+3x-28 can be expressed as (x+a)(x-b).
in order to compare (x+7)(x-4) and (x+a)(x-b).
As a result, a = 7 and b = 4.
Similarly,
x²-10x-56$
x²-14x+4x-56 [ 56= 7×2×2×2, - (7×2)+(2×2) = -14+4=10]
x(x-14)+4(x-14)
(x-14)(x+4)
Given that (x+2b)(x+c) can be used to represent x2-10x-56.
Consequently, compare (x-14)(x+4)and (x+2b)(x+c).
Now, c=4 [∵c>0].
Then,
2c-a
(2×4)-7
8-7
1
Therefore, the required value of the expression 2c - a is 1.
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once a homework quiz is opened, how long does the student have to submit the quiz? group of answer choices 2 hours, but must submit the exam no later than the closing time. 3 hours, but must submit the exam no later than the closing time. 4 hours, but must submit the exam no later than the closing time. 5 hours, but must submit the exam no later than the closing tim
3 hours, but must submit the exam no later than the closing time.
The browser displays a notification banner for tests that have a due date to inform students when the test will be marked as incomplete (30 minutes prior, 5 minutes prior, and 1 minute prior).
The browser displays a notification banner for quizzes that are about to auto-submit (using an Until date or the natural course finish date) to inform students of this (30 minutes prior, 5 minutes prior, 1 minute prior, and 10 seconds prior).3 hours, but must submit the exam no later than the closing time.
If students are unable to finish a timed quiz in the full permitted time, the browser will display a notification banner.
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how many liters of a 15% alcohol solution must be mixed with 30 liters of a 40% alcohol solution to obtain a 30% solution
Answer: 20 liters
Step-by-step explanation:
Let the number of liters of 15% alcohol solution be [tex]x[/tex].
[tex]0.15x+30(0.4)=0.3(x+30)\\\\0.15x+12=0.3x+9\\\\12=0.15x+9\\\\0.15x=3\\\\x=20[/tex]
help me with my maths homework please, thanks for your responses
On solving the provided question we can say that by factorization are
x(x-3) + 2(x-3) ⇒(x-3)(x+2) ⇒ x = 3, -2
what is factorization?A number or other mathematical object is factored, or written as the product of numerous factors—typically smaller or simpler things of the same kind—in mathematics. For instance, the integer 15 is factorized as 3 5, which is the factorization of the polynomial x2 – 4. Factorization in mathematics refers to the breakdown of a number into smaller numbers that are multiplied together to produce the original number. Factorization is the division of a number into its factors or factors. 12 is multiplied by 3 and 4 as an example.
the polynomial is as = x^2 + 14x + 48
by factorization are
x(x-3) + 2(x-3)
(x-3)(x+2)
x = 3, -2
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Solve for X, Leave in simplest radical form.
Hope it helps.
If you have any query, feel free to ask.
1. Find the slope of the line.
−3x−4y=6
2. Find the slope of the line that is (a) perpendicular to the line that goes through points (6, -1) and (-4, -10).
The slope of the line in 1. is -3/4 and the slope of 2. is 9/10.
What is slope?Understanding what slope is is among the most crucial things to know about lines. The line's slope, also referred to as rise over run, is how "steep" it is. By dividing the difference between the y-values at two points by the difference between the x-values, we can determine slope. Understanding how to interpret graphs and create equations is necessary in order to comprehend the significance of the definition of slope.
The slope of the line = m in y = mx + b
−3x−4y=6
4y = -3x -6
y = (-3x -6)/4
y = -3x/4 -6/4
y = -3/4(x) -3/2
2. Slope formula = y₂ - y₁ = m(x₂ -x₁)
points (6, -1) and (-4, -10)
Substitute
-10 -(-1)= m(-4 -6)
m = 9/10
Thus, the slope of the line in 1. is -3/4 and the slope of 2. is 9/10.
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Height in meters 15 30 45 60 75 90 105 Distance in kilometers 13.833 19.562 23.959 27.665 30.931 33.833 36.598 1. Determine a function that could be used to model the data in the table. Make sure to use h for height and d for distance.
1. a function that could be used to model the data in the table. Make sure to use h for height and d for distance is d = -0.425h + 39.25
2. If the balloon is 800 meters high, the farthest distance that you would be able to see is 48 km
3. at the height of 67 does the balloon have to rise for the building to be visible.
The table in the question shows a relationship between the height of a balloon and the distance away from the balloon that can be seen. Using this data, a linear function can be determined that models this relationship. The function is d = -0.425h + 39.25, where h is the height of the balloon in meters and d is the distance in kilometers. Using this function, if the balloon is 800 meters high, the farthest distance that can be seen is 48 km, which is the y-intercept of the equation.
Inversely, if a building is 16 km away from the balloon, the height the balloon must rise for the building to be visible is 67 m. This can be determined by substituting 16 for d in the equation and solving for h. Overall, the linear function d = -0.425h + 39.25 models the relationship between the height of the balloon and the distance away from the balloon that can be seen. The equation can be used to determine the height of the balloon needed to see a certain distance or the distance away from the balloon that can be seen when the balloon is at a certain height.
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Height in meters 15 30 45 60 75 90 105 , Distance in kilometers 13.833 19.562 23.959 27.665 30.931 33.833 36.598
1. Determine a function that could be used to model the data in the table. Make sure to use h for height and d for distance.
2. If the balloon is 800 meters high, what is the farthest distance that you would be able to see? Round the answer to the nearest whole number
3. Round answer to the nearest whole number A building is 16 km away. What height does the balloon have to rise for the building to be visible?
If f(1)=3 and f(n)=f(n-1)^2+n then find the value of f(3)
Answer:
[tex]\sqrt{\sqrt{2} }[/tex]
Step-by-step explanation:
f(1)=3; f(1)=f(0)^2+1
f(0)=[tex]\sqrt{2}[/tex]=f(3)^2+0; f(3)^2=sqrt*2; f(3)=sqrt*sqrt2
what is the reciprocal of -2/7
Answer: -3.5 is the reciprocal
Answer:
= 7/-2
= -7/2
Step-by-step explanation:
The reciprocal number results from dividing the number 1 ny the original number, in this case:
original number = -2/7
reciprocal number = 1 / (-2/7) = (1*7)/-2 = 7/-2 = -7/2
