Answer:
So the answer would be 21 because the side is longer than 12 but not longer than 21
(19x-18) (7x+1) (10x-9) find x
Answer:
x = 5
Step-by-step explanation:
combine the like terms :)
pla shop mathematics
The number of trees more than 10m tall but not more than 20m tall is 18 trees.
How many of the trees are more than 10m tall but not more than 20m tall?0 < h ≤ 5 = 5
height greater than 0m less than or equal to 5m
5 < h ≤ 10 = 9
height greater than 5m less than or equal to 10m
10 < h ≤ 15 = 13
height greater than 10m less than or equal to 15m
15 < h ≤ 20 = 5
height greater than 15m less than or equal to 20m
20 < h ≤ 25 = 1
height greater than 20m less than or equal to 25m
The number of trees that are more than 10m tall but not more than 20m tall are;
10 < h ≤ 15 = 13
15 < h ≤ 20 = 5
So,
13 + 5 = 18 trees
Therefore, the total number of trees which are 10m tall but not more than 20m tall is 18 trees.
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There is a spinner with 15 equal areas, numbered 1 through 15. If the spinner is spun one time, what is the probability that the result is a multiple of 3 and a multiple of 5?
Answer:
Step-by-step explanation:
7 / 15 ≈ 0.47Explanation:1) Probability = number of positive outcomes / number of possible outcomes2) Positive outcomesMultiples of 5: 5, 10, and 15Multiples of 3: 3, 6, 9, 12, 15.Different outcomes (cancel the repetitions): 3, 5, 6, 9, 10, 12, and 15.Number of different positive outcomes: 73) Number of possible outomes: 154)
Probability = 7 / 15 ≈ 0.47
For a group of objects of the same material, the weight of an object varies directly with its volume. If an object that has a volume of 30 cubic inches weighs 24 ounces, what is the constant of variation?
Answer:
4/5 oz / cu in
Step-by-step explanation:
The standard equation of direct variation is:
y = kx
where y varies directly with x, and k is the constant of variation.
24 oz = k * 30 cu in
k = 24/30 oz / cu in
k = 4/5 oz / cu in
Let A and B be nxn matrices. Which of the following statements are always true? (i) If det(A) = det(B) then det(A − B) = 0. (ii) If A and B are symmetric, then the matrix AB is also symmetric. (iii) If A and B are skew-symmetric, then the matrix AT + B is also skew-symmetric.
The statement "If det(A) = det(B), then det(A - B) = 0" is not always true. The determinant of a matrix is not additive under subtraction.
Therefore, the determinant of the difference of two matrices does not necessarily equal zero even if the determinants of the individual matrices are equal. Counterexamples can be easily constructed.
The statement "If A and B are symmetric, then the matrix AB is also symmetric" is not always true. The product of two symmetric matrices is not necessarily symmetric. Counterexamples can be easily constructed.
The statement "If A and B are skew-symmetric, then the matrix AT + B is also skew-symmetric" is always true. A skew-symmetric matrix has the property that its transpose is equal to the negative of the original matrix. Therefore, taking the transpose of AT + B results in -(AT + B), which is the negative of the original matrix. Hence, the matrix AT + B is also skew-symmetric.
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Please help me find this answer
Answer:
A = 706.9 ft²
C = 94.2 ft
Step-by-step explanation:
A = πr²
C = πd
r = d/2 = 30 ft/2 = 15 ft
A = π × (15 ft)² = 225π ft² = 706.9 ft²
C = π × 30 ft = 30π ft = 94.2 ft
The solution to the equation
log2x + log2(x – 6) = 4 is x =
still If we plug in x = -2 into the original equation.
What is the logarithm?A logarithm is a mathematical function that helps to determine how many times a particular number must be multiplied by itself to obtain a specific value. In other words, the logarithm of a number is the exponent to which another fixed value, called the base, must be raised to produce that number.
Given by the question.
Using logarithm rules, we can simplify the left-hand side of the equation:
log2x + log2(x – 6) = log2(x (x – 6))
So, the equation becomes:
log2(x (x – 6)) = 4
Using the description of logarithms, we can rewrite this as:
\(2^{4}\) = x (x – 6)
Simplifying the left-hand side, we get:
16 = \(x^{2}\) – 6x
Moving all the terms to one side, we get a quadratic equation:
\(x^{2}\) – 6x – 16 = 0
We can break this using the quadratic formula:
x = [6 ± sqrt (\(6^{2}\)+ 4(1)(16))] / 2
x = [6 ± sqrt (100)] / 2
x = [6 ± 10] / 2
x = 8 or x = -2
still, we need results are valid, because we cannot take the logarithm of a negative number or of zero.
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Posting more questions so please go to my page if you know this thank you
Answer:
I'm thinking the answer is 76 but I could be wrong
Step-by-step explanation:
The Gallup organization recently conducted a survey of 1,015 randomly selected U.S. adults about "Black Friday" shopping. They asked the following question: "As you know, the Friday after Thanksgiving is one of the biggest shopping days of the year. Looking ahead, do you personally plan on shopping on the Friday after Thanksgiving, or not?" Of the 515 men who responded, 16% said "Yes." Of the 500 women who responded, 20% said "Yes." Construct a 95% confidence interval for the difference between the proportion of men and women who planned to shop on the Friday after Thanksgiving. Use three decimal places when computing the margin of error. -0.103 to 0.023 0 -0.102 to 0.022 0 -0.087 to 0.007 0 -0.080 to 0.000
The 95% confidence interval for the difference between the proportion of men and women who planned to shop on the Friday after Thanksgiving is -0.080 to 0.000.
We are given a survey that was conducted by the Gallup organization. They randomly selected 1015 U.S. adults and asked them about their shopping plans for "Black Friday". They asked a simple question, "As you know, the Friday after Thanksgiving is one of the biggest shopping days of the year. Looking ahead, do you personally plan on shopping on the Friday after Thanksgiving, or not?"
Out of the 515 men who responded to the question, 16% said "Yes", and out of the 500 women who responded, 20% said "Yes". We are supposed to construct a 95% confidence interval for the difference between the proportion of men and women who planned to shop on the Friday after Thanksgiving.
We can approach this problem using the formula below:
(p1 - p2) ± z*SE(p1 - p2)
Here, p1 and p2 are the population proportions, and SE is the standard error of the difference between the sample proportions. We have to find the value of z for the 95% confidence level. Since we have a two-tailed test, the critical values would be ±1.96.
Next, we can find the standard error using the formula below:
SE = √[(p1q1/n1) + (p2q2/n2)]
where p1 and p2 are the sample proportions, q1 and q2 are the complements of the sample proportions, and n1 and n2 are the sample sizes.
Let's plug in the given values.
For men, p1 = 0.16, q1 = 0.84, and n1 = 515.
For women, p2 = 0.20, q2 = 0.80, and n2 = 500.
Now, we can calculate the standard error.
SE = √[(0.16 * 0.84/515) + (0.20 * 0.80/500)]
SE = 0.0286
Finally, we can calculate the confidence interval by plugging in the values.
(0.16 - 0.20) ± 1.96 * 0.0286 = -0.080 to 0.000
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Solve 7x+41≤6x+46, where x is a whole number. Which graph represents all the solutions to this inequality?
The solution is x ≤ 5.
The graph that represents all the solutions to this inequality is given below.
What is inequality?It shows a relationship between two numbers or two expressions.
There are commonly used four inequalities:
Less than = <
Greater than = >
Less than and equal = ≤
Greater than and equal = ≥
We have,
7x + 41 ≤ 6x + 46
Solve for x.
7x + 41 ≤ 6x + 46
7x - 6x ≤ 46 - 41
x ≤ 5
This means,
The solutions are 5 and values less than 5.
The graph is given below.
Thus,
The solution is x ≤ 5.
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25 points!!!!!!!!!!!!!!!!!!!!!
Answer:
line graph for sure ig..........
Answer: Line graph is the answer . Hope this is helpful .
evaluate the expression 6x + 4 9/10 when x = 2/3.
x=2/3
6(2/3) + 4 9/10 =4 + 4 9/10 = 8 9/10
Answer:
2x-1=y,2y+3=x
Step-by-step explanation:
no explanation
In the EAI sampling problem, the population mean is $51,800 and the population standard deviation is $4,000. When the sample size is n = 30, there is a .5034 probability of obtaining a sample mean within +/- $500 of the population mean. A. What is the probability that the sample mean is within $500 of the population mean if a sample of size 60 is used (to 4 decimals)?
B. What is the probability that the sample mean is within $500 of the population mean if a sample of size 120 is used (to 4 decimals)?
A) The probability that the sample mean is within $500 of the population mean for a sample of size 60 is 0.6611
B) The probability that the sample mean is within $500 of the population mean for a sample of size 120 is 0.7362
The EAI (Error of the Estimate) sampling problem is a specific case of the Central Limit Theorem, which states that the distribution of sample means from a population with a finite variance will be approximately normally distributed as the sample size increases.
The formula for calculating the standard error of the mean is
SE = σ/√n
where SE is the standard error, σ is the population standard deviation, and n is the sample size.
For n = 30, SE = 4,000/√30 = 729.16
A. For a sample size of n = 60, SE = 4,000/√60 = 516.40
To find the probability that the sample mean is within $500 of the population mean, we need to calculate the z-score for a range of +/- $500
z = (x - μ) / SE
where x is the sample mean, μ is the population mean, and SE is the standard error.
For a range of +/- $500, the z-scores are
z = ($51,300 - $51,800) / 516.40 = -0.969
z = ($52,300 - $51,800) / 516.40 = 0.969
Using a standard normal distribution table, the area between z = -0.969 and z = 0.969 is 0.6611.
B. For a sample size of n = 120, SE = 4,000/√120 = 368.93
Following the same steps as above, the z-scores for a range of +/- $500 are
z = ($51,300 - $51,800) / 368.93 = -1.364
z = ($52,300 - $51,800) / 368.93 = 1.364
Using the standard normal distribution table, the area between z = -1.364 and z = 1.364 is 0.7362.
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State the conditions required for a random variable x to follow a poisson process.
The conditions required for a random variable X to follow a Poisson process. The probability of success is the sme for aany two intervals of equal length. The probability of two or more successes in any sufficiently small subinterval is 0.
Is the time required to upload a file to the Internet discrete or continuous?Is the length of time it takes to download a file from the Internet a random variable, a continuous random variable, or not at all? A continuous random variable, that is.Is the a discrete random variable a continuous random variable or not a random variable?A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement. A random variable is a variable whose value is the resultant number of an unpredictable event. There are a countable number of potential values for the discrete random variable X.How do you determine whether the random variable is discrete or continuous?A discrete variable is one that is random. if the number of possible values is either countable or finite. Continuous refers to a variable that is random. if the range of possible values includes all conceivable numbers.
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A randomly selected sample of 100 horse owners found that 72 of them feed grass hay in the morning and alfalfa in the evening to their horses . The value 0.72 represents a . the probability that a randomly selected horse owner will feed grass hay in the A.M.and alfalfa in the P.M. b . the proportion of horse owners in the sample that feed grass hay in the a.m. and alfalfa in the p.m. c . the probability that a horse will be fed grass hay in the A.M.and alfalfa in the P.M. d . All of the choices are correct .
Answer: A. the probability that a randomly selected horse owner will feed grass hay in the A.M.and alfalfa in the P.M.
A passenger train travels 528 miles in 8 hours
Answer:
66 miles per hour
Step-by-step explanation:
528/8 = 66 miles per hour
Answer:
66 miles/hour.
Step-by-step explanation:
Its average speed is 528/8
= 66 miles/hour.
please help me. I figured out my last question but i really need help!!! please
The area of the figure is 51.63 m²
How determine area of the composite figure?
A composite figure is figure that is made up of two or more different shapes.
The composite figure in the given image is made up of a rectangle, semicircle and a triangle. Therefore, the area of the composite figure will be the sum of the areas of the shape it is made of. Thus:
Area of figure = area if rectangle + area of semicircle + area of triangle
Area of figure = LW + 1/2πr² + 1/2bh
Area of figure = (6 × 5) + (1/2 × 3.14 × 3²) + (1/2 × 3 × 5)
Area of figure = 30 + 14.13 + 7.5
Area of figure = 51.63 m²
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IF 2 + 2 = 4 AND 4 + 4 = 8 WHY AM I STILL BROKE !!!!!
Answer:
You are still broke because you forgot that you have no money to add with
Step-by-step explanation:
Historically, the members of the chess club have had an average height of 5′ 6′′ with a standard deviation of 2". What is the probability of a player being between 5′ 2′′ and 5' 6"? (Submit your answer as a whole number. For example if you calculate 0.653 (or 65.3% ), enter 65. )
The probability of approximately 48% that a player will have a height between 5'2" and 5'6".
To calculate the probability of a player being between 5'2" and 5'6" given that historically, the members of the chess club have had an average height of 5'6" with a standard deviation of 2", we can use the standard normal distribution.
First, we need to convert the heights to z-scores using the formula:
z = (x - μ) / σ
where x is the height we want to find the probability for, μ is the mean height, and σ is the standard deviation.
For 5'2":
z = (62 - 66) / 2 = -2
For 5'6":
z = (66 - 66) / 2 = 0
Next, we can use a standard normal distribution table or calculator to find the area under the curve between these two z-scores.
Using a standard normal distribution table, we can find that the area to the left of z = -2 is 0.0228 and the area to the left of z = 0 is 0.5. Therefore, the area between z = -2 and z = 0 is:
0.5 - 0.0228 = 0.4772
Multiplying this by 100 gives us a probability of approximately 48% that a player will have a height between 5'2" and 5'6".
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Can someone plz help me? :(
Unit cubes are placed on a pan balance. There are 3 cubes on one pan and 9 cubes on the other pan. What can you do to make the pans balance?
Answer:
You know 9+3=12 , So Even it out 6 on 1 pan and 6 on the other it will balance.
PLEASE HELP!! SHOW WORK! WILL AWARD BRAINLIEST TO CORRECT ANSWER!!
Bobby ran and biked for a total of 38 miles in 4 hours. His average running speed was 5 mph and his average biking speed was 11 mph.
Let x = total hours Bobby ran
Let y = total hours Bobby biked
Use substitution to solve for x and y.
a) How many hours did Bobby run?
b) How many hours did he bike? Show your work!
A line passes through the points (1, -6) and (4,3). What is the y-intercept of this line?
○ -9
○ -3
○ 3
○ 9
The product of 16 and a number x
Step-by-step explanation:
the answer id 16 multiply by x number mens 16×x
a spherical balloon is inflated at a rate of 50 m2/min. find the rate at which the radius of the balloon is increasing when the diameter is 20 m.
The radius of the balloon is increasing at a rate of (5/8π) when the diameter is 20 m.
What are angles? What is a mathematical function, equation and expression?function : In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.expression : A mathematical expression is made up of terms (constants and variables) separated by mathematical operators.equation : A mathematical equation is used to equate two expressions.Given is a spherical balloon is inflated at a rate of 50 m²/min.
The surface area of the spherical balloon will be -
S = 4πr²
Now, we can write -
dS/dt = d/dt(4πr²)
dS/dt = 4π x 2r x dr/dt
4π x 2r x dr/dt = 50
dr/dt = (50/8πr)
dr/dt = (100/8πd)
{dr/dt} (d = 20 m) = (5/8π)
Therefore, the radius of the balloon is increasing at a rate of (5/8π) when the diameter is 20 m.
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For f(x) = 3x+1 and g(x)=x2-6, find (f- g)(x).
The simplified equation of the given Arithmetic function (f- g)(x) is:
-x² + 3x + 7.
Arithmetic function describe as:Arithmetic is a fundamental branch of mathematics that studies the properties of classical operations on numbers such as addition, subtraction, multiplication, division, exponentiation, and root extraction.
Which of the following is not an arithmetic function?Addition, subtraction, multiplication, as well as division are the four basic arithmetic operations. There are additional arithmetic operators, such as exponentiation, modulus operations, increment, decrement, and so on. * - The operator for multiplication. As a result, the And operator is not an arithmetic operator.
According to the given information:Given:
f(x) = 3x+1
g(x)=x²-6
(f- g)(x) =
Substituting the value we get:
(f - g)(x) = (3x + 1) - (x² - 6)
= 3x + 1 - x² + 6
= -x² + 3x + 7
The simplified equation of the given Arithmetic function (f- g)(x) is = -x² + 3x + 7.
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Each side of a square office is 3 meters long. It will cost $44.14 per square meter to replace
the carpet in the office. What would be the total cost to replace the carpet?
Answer:
3*3*44.14$
That's the answer
Use a calculator
Use the Distributive Property to expand 6(−4x+3y) .
Answer:
-24x + 18y
Step-by-step explanation:
3x + 7 = 35 Tell me what you would do for the first step
Answer:
First subtract 7 from both sides
Then divide 3 from sides
and x should be by itself
Step-by-step explanation:
PLEASE HELP WILL GIVE BRAINLIEST SIMPLIFY THE FOLLOWING EXPRESSION I NEED BOTH
Answer:
First one- 1/5^2
Second- 2/3m^15
Step-by-step explanation:
Complete the function for this graph.