Answer:
5 units
Step-by-step explanation:
d=
\( \sqrt{(x2 - x1}^{2} ) + \sqrt{(y2 - y1) {}^{2} } \)
a formula in the form y=mx+b models the cost, y, of four-year college x years after 2010. would you expect m to be positive, negative, or zero? explai your answer
we would expect m to be positive.
In this case, we're considering a formula of the form y = mx + b, where y represents the cost of a four-year college x years after 2010. The variable m represents the coefficient of x, which determines the slope of the line.
Since we're discussing the cost of college, it's reasonable to expect that it generally increases over time. Therefore, we would expect the coefficient m to be positive. A positive value of m indicates that as the number of years after 2010 increases (x), the cost of college (y) will also increase.
If m were negative, it would imply a decreasing cost over time, which is less likely for a four-year college. If m were zero, it would indicate that the cost remains constant regardless of the number of years after 2010, which is also unlikely given the rising trend in college costs.
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Suppose that a study of elementary school students reports that the mean age at which children begin reading is 5.4 years with a standard deviation of 0.8 years. Step 1 of 2: If a sampling distribution is created using samples of the ages at which 38 children begin reading, what would be the mean of the sampling distribution of sample means? Round to two decimal places, if necessary.
Answer:
According to the Central Limit Theorem, the sampling distribution of sample means would have a mean of 5.4 years.
Step-by-step explanation:
For a normally distributed random variable X, with mean and standard deviation, the sampling distribution of sample means with size n can be approximated to a normal distribution with mean and standard deviation.
As long as n is at least 30, the Central Limit Theorem can also be applied to skewed variables.
We have the following problem:
5.4 years is the average age for the entire population.Based on the Central Limit Theorem, 5.4 years would be the mean of the sampling distribution of sample means.Answer:
Step-by-step explanation:
The mean of the sampling distribution of sample means can be calculated using the formula:
μM = μ
where μ is the population mean and M is the sample mean.
Thus, μM = μ = 5.4 years.
Therefore, the mean of the sampling distribution of sample means would also be 5.4 years.
A chain weighs 12 pounds per foot. How many ounces will 4 inches weigh? Round your answer to the nearest tenth as needed.
Answer:
1 chain = 12 pounds
4 inches = x
4×12=49
= 50
6th grade math , help me please :))
Answer:
A. 2x + 20
B. 20y + 15
C. 21c - 7
D. 24n + 28
E. 10x - 50
F. 18n + 45
Answer:
a)2x+20
b)20y+15
c)21c-7
d)24n+28
e)10x-50
f)18n+45
Step-by-step explanation:
a)2(x+10)=2*x+2*10=2x+20
b)5(4y+3)=5*4y+5*3=20y+15
c)7(3c-1)=7*3c-7*1=21c-7
d)4(6n+7)=4*6n+4*7=24n+28
e)10(x-5)=10*x-10*5=10x-50
f)9(2n+5)=9*2n+9*5=18n+45
Help please and thank you if you do all of them I will mark you as Brainliest
rounded to tens: 30,190, 5,010 and 20
rounded to tenths: 62.6, 1.1, 0.0, and 270.6
rounded to hundredths: 0.12, and 98.51
give the other person brainiest please
Answer:
what??????????????????????
Step-by-step explanation:
Answer:
am pro am big brain two
:D
Step-by-step explanation:
⠀⠀⣠⣤⣤⣤⣤⣤⣶⣦⣤⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀
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Add these fraction
1) 2/3 + 6/3
2) 4/6+9/6
3) 6/6+6/6
The values of (2/3 + 6/3), ( 4/6 + 9/6 ) and ( 6/6 + 6/6 ) are 8/3, 13/6 and 2 respectively.
What is the value of the addition operation?Given that;
1) 2/3 + 6/3
We combine the numerators over the common denominators
= ( 2 + 6 ) / 3
= 8/3
2) 4/6 + 9/6
We combine the numerators over the common denominators
= ( 4 + 9 ) / 6
= 13/6
3) 6/6 + 6/6
We combine the numerators over the common denominators
= ( 6 + 6 ) / 6
= 12/6
= 2
The values of (2/3 + 6/3), ( 4/6 + 9/6 ) and ( 6/6 + 6/6 ) are 8/3, 13/6 and 2 respectively.
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PLS Help which expression repression of this prism?
A. 2x8 units
B. 1x8 units
C. 2x4 units
D. 4x8 units
Answer:
c
Step-by-step explanation
hope this helped you please give me brainliest
If one half gallon of paint covers 1/8 of a wall then how much paint is needed to cover the entire wall
Answer:
4 gallons of paint
Step-by-step explanation:
We know that 1/2 gallon paints 1/8 of a wall.
We can multiply to find the total amount.
1/2 * 8 = 4 gallons
Best of Luck!
Answer:
4 Gallons
Step-by-step explanation:
if one gallon equals 2/8 then 4 gallons equals 8/8
(Ill give brainliest and extra points if u help)
Robert says he needs 250 plastic sleeves for his baseball card collection. He has 3,084 baseball cards. Each sleeve has 12 cards. Do you agree with Robert?
Explain your reasoning.
(Write at least 4 sentences to support your answer pls :D)
Answer:
NO.
Step-by-step explanation:
If Robert has a total of 3,084 baseball cards, and each sleeve can contain 12 cards, we can figure out how many sleeves he would need by dividing the two. When we divide 3,084 by 12, we find that it equals 257. Robert figured he'd need 250. His conclusion is, thus, 7 cards deficient.
no
same person on top of me
Step-by-step explanation:
Please anyone that can help me
Answer:
\(|\frac{x}{y} |\)
Step-by-step explanation:
Pre-SolvingWe are given the following expression: \(\sqrt\frac{x^3y^5}{xy^7}\), where x > 0 and y > 0.
We want to simplify it.
To do that, we can first simplify what is under the radical, then take the square root of what is left.
Recall that when simplifying exponents, we don't want any negative or non-integer radicals left.
SolvingTo simplify what is under the radical, we can remember the rule where \(\frac{a^n}{a^m} = a^{n-m}\).
So, that means that \(\frac{x^3}{x} = x^2\) and \(\frac{y^5}{y^7} = y^{-2}\) .
Under the radical, we now have:
\(\sqrt{x^2y^{-2}}\)
Now, we take the square root of both exponents to get:
\(|xy^{-1}|\)
The reason why we need the absolute value signs is because we know that x > 0 and y > 0, but when we take the square root of of \(x^2\) and \(y^{-2}\) , the values of x and y can be either positive or negative, so by taking the absolute value, we ensure that the value is positive.
However, we aren't done yet; remember that we don't want any radicals to be negative, and the integer of y is negative.
Recall that if \(a^{-n}\), that is equal to \(\frac{1}{a^n}\).
So, by using that,
\(|x * \frac{1}{y} |\)
This can be simplified to:
\(|\frac{x}{y} |\)
In triangle HJK shown above what is the measure of ∠J in degrees
Angles in a triangle adds up to 180
180 - (25.5 +120.2) = 34.3
So, missing angle is 34.3 degrees
Hope this helps!
reduce the fraction 512/128 into the simplest form.
Answer:
Therefore, 512/128 simplified to lowest terms is 4/1.
Step-by-step explanation:
Reduce 512/128 to lowest terms
The simplest form of
512
128
is
4
1
.
Steps to simplifying fractions
Find the GCD (or HCF) of numerator and denominator
GCD of 512 and 128 is 128
Divide both the numerator and denominator by the GCD
512 ÷ 128
128 ÷ 128
Reduced fraction:
4
1
Therefore, 512/128 simplified to lowest terms is 4/1.
PLEASE help fast with attached question!! Thanks!
Answer: I thihnk it's 1x10^-2
Step-by-step explanation: This equals 0.1, and 6^-2 is equal to 0.1....the rest of the answers are either too big or too small
See question below. Round your answer to the nearest tenth.
1) In this problem, we must remind that the final amount on the left is half the initial one. Thus, we can plug into that formula the initial amount as 1 and the final 0.5
2) So, let's plug them into the formula:
\(\begin{gathered} y=y_0e^{-0.086t} \\ \\ 0.5=1\cdot e^{-0.086t} \\ \\ e^{-0.086t}=0.5 \\ \\ \ln \left(e^{-0.086t}\right)=\ln \left(0.5\right) \\ \\ -0.086t=\ln \left(0.5\right) \\ \\ \frac{-0.086t}{-0.086}=\frac{\ln \left(0.5\right)}{-0.086} \\ \\ t=-\frac{\ln \left(0.5\right)}{0.086} \\ \\ t\approx8.0 \end{gathered}\)Thus, the half-life is 8 hours
A doctor assigns people to treatment groups based on data from their medical records. Is this method of selecting treatment groups biased or unbiased?
9514 1404 393
Answer:
biased
Step-by-step explanation:
Any time a selection criterion is used that is other than a random draw, the selection is biased.
For a medical study, the bias may be intentional. The study may have the purpose of determining treatment efficacy based on age, gender, or previous medical history.
PLEASE HELP. I don’t understand
Suppose that voting in municipal elections is being studied and four people are randomly selected. The accompanying table provides the probability distribution
where x is the number of those people that voted in the last election.
The unusual outcome from this discrete probability distribution is given as follows:
x = 4.
What are unusual events?In a discrete probability distribution, unusual outcomes are those outcomes which have a probability having a value lower than 0.05 = 5%.
From the given table, the probabilities for the events x are given by P(x), as follows:
x = 0 -> P(x) = 0.23.x = 1 -> P(x) = 0.32.x = 2 -> P(x) = 0.26.x = 3 -> P(x) = 0.15.x = 4 -> P(x) = 0.04.Hence the lone unusual outcome is given by x = 4, as it is the lone probability that is lower than 0.05.
None of the other events are unusual, as all of them have probabilities that are greater than 0.05 = 5%.
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Find the experimental probability of tossing heads.
H stands for heads and T stands for Tails.
Coin Toss Results: T, H, T, H, T, H, T, T, T, T, H, T, H, T, T
The value of the experimental probability of tossing heads is,
⇒ 1 / 3
We have to given that;
Coin Toss Results: T, H, T, H, T, H, T, T, T, T, H, T, H, T, T
Where, H stands for heads and T stands for Tails.
Hence, Total outcomes = 15
And, Head outcomes = 5
Thus, The value of the experimental probability of tossing heads is,
⇒ 5 / 15
⇒ 1 / 3
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if
\( \frac{x}{y} = - 2\)
solve this:
\( \sqrt{ \frac{ {x}^{2} }{ {y}^{2} } + \frac{ {y}^{2} }{ {x}^{2} } } \)
Answer:
\(\sqrt{17}/2\)Step-by-step explanation:
Given:
x/y = - 2Then:
y/x = - 1/2Solve the expression:
\(\sqrt{x^2/y^2+y^2/x^2} =\)\(\sqrt{(x/y)^2+(y/x)^2} =\)\(\sqrt{(-2)^2+(-1/2)^2} =\)\(\sqrt{4+1/4} =\)\(\sqrt{17/4} =\)\(\sqrt{17}/2\)x/y = -2
Then,
x = -2
y = 1
=》y/x = 1/-2 = -1/2
The remaining steps are attached. Please check.
=》 Final answer = √17/4 = 2.061 (approx.)
______
RainbowSalt2222 ☔
Is the point (4, 3) a solution to the inequality y≥1−x?
Which of the following is the best example of something considered multimedia.
A collage using paper,wood, and paint
A photograph collection
A radio ad
A mash up of two songs
Answer: a collage using paper, wood, and paint
Step-by-step explanation:
Answer:
A) a collage using paper,wood, and paint
Identify the number of solutions of the system of linear equations.
x=y+3z=6
x-2y = 5
2x - 2y + 5z = 9
no solution
exactly one solution
infinitely many solutions
Solve the system. If there are infinitely many solutions, write the ordered triple in terms of z. If there is no solution, lea
The solution is (x, y, z)
-1.2
3
The solution to the system of linear equations is (x, y, z) = (64/11, 37/11, 9/11). The system has exactly one solution.
Let's solve the system of linear equations correctly.
The given system of linear equations is:
x = y + 3z = 6
x - 2y = 5
2x - 2y + 5z = 9
To determine the number of solutions, we can analyze the system using the method of elimination or substitution. Let's use the method of elimination:
From equation 1, we have:
x = y + 3z
Substituting this value of x in equation 2:
(y + 3z) - 2y = 5
y + 3z - 2y = 5
-z + 3z = 5 - y
2z = 5 - y
Now, let's substitute the value of x in equation 3:
2(y + 3z) - 2y + 5z = 9
2y + 6z - 2y + 5z = 9
11z = 9
Simplifying the equation, we find:
z = 9/11
Now, substituting this value of z back into the equation 2z = 5 - y, we get:
2(9/11) = 5 - y
18/11 = 5 - y
18/11 - 5 = -y
18/11 - 55/11 = -y
-37/11 = -y
y = 37/11
Finally, we can substitute the values of y and z into equation 1 to find the value of x:
x = y + 3z
x = 37/11 + 3(9/11)
x = 37/11 + 27/11
x = 64/11
Therefore, the solution to the system of linear equations is (x, y, z) = (64/11, 37/11, 9/11).
The system has exactly one solution.
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The following data has been collected from the Paper Company. The data collected concerned the employees' favorite cell phone carrier. Of the 500 employees in the company, 200 were surveyed. The results are below:
Verizon: 105
Sprint: 55
AT&T: 40
How many employees were part of the random sampling?
500 employees
150 employees
200 employees
300 employees
What is the base and the height of the triangle?
25 brainly to corret answer show all work pls
The perimeter of Max's sandbox is 21 feet.
What is perimeter of a figure?The sum of each length of external sides or boundary of a given figure is called its perimeter. To determine the perimeter of an object, add up the length of its boundaries.
Given the dimension of the Ohio park, then we have to determine the representative fraction of Max's sandbox.
Representative fraction = 10/ 25
= 2/ 5
So that;
x = 15 * 2/5
= 6 ft
y = 12.5 *2/5
= 5 ft
The perimeter of Max's sandbox = 10 + y + x
= 10 + 5 + 6
= 21 ft
The perimeter of Max's sandbox is 21 feet.
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help me with dis pls
Answer:
53, -84, 24, -38
Step-by-step explanation:
Help Quickly! For every 7 feet of rise, a hill runs 15 feet. What is the hill’s slope?
A. -8
B. 7/15
C. 15/7
D. 8
Answer:
I believe it's D
Sorry if incorrect
I need to find the codes to finish this level. I need 8 letters to complete the code! Help please ;)
Answer:ABFEGK
Step-by-step explanation:
Points A (4, 3), B (6, 4), C (5, 6) and D (3, 5) are the vertices of a square ABCD. The square ABCD is reflected about the line through (0, 0) and (-2, 2). Find the vertices of the image of the square ABCD and present both the figures on the same graph.
The vertices of the reflected square.
Let's calculate them:
A' = (-0.914, 3.914)
B' = (-2.828, 5.828)
C' = (-0.086, 7.086)
D' = (1.828, 5.172)
The vertices of the image of the square ABCD after reflecting it about the line through (0, 0) and (-2, 2), we can use the following steps:
Find the equation of the reflection line:
The reflection line passes through (0, 0) and (-2, 2).
We can calculate the slope (m) of the line using the formula (y2 - y1) / (x2 - x1):
m = (2 - 0) / (-2 - 0) = 2 / -2 = -1.
Using the point-slope form of a line (y - y1) = m(x - x1), we can use either of the given points to write the equation of the line:
y - 0 = -1(x - 0)
y = -x.
Find the midpoint of each side of the square:
The midpoints of the sides of a square are also the midpoints of its diagonals.
The midpoint of AB is ((4+6)/2, (3+4)/2) = (5, 3.5).
The midpoint of BC is ((6+5)/2, (4+6)/2) = (5.5, 5).
The midpoint of CD is ((5+3)/2, (6+5)/2) = (4, 5.5).
The midpoint of DA is ((3+4)/2, (5+3)/2) = (3.5, 4).
Reflect the midpoints about the line:
To reflect a point (x, y) about the line y = -x, we can find the perpendicular distance (d) from the point to the line and use it to determine the reflected point.
The perpendicular distance d from the line y = -x to a point (x, y) is given by the formula:
d = (y + x) / √(2).
The coordinates of the reflected points can be found using the formula for reflection across a line:
x' = x - 2d / √(2)
y' = y - 2d / √(2).
Calculate the reflected vertices:
The coordinates of the reflected vertices are as follows:
A' = (4 - 2(3.5 + 5) / √(2), 3 - 2(3.5 - 5) / √(2))
B' = (6 - 2(5 + 5) / √(2), 4 - 2(5 - 5) / √(2))
C' = (5 - 2(5.5 + 5) / √(2), 6 - 2(5.5 - 5) / √(2))
D' = (3 - 2(4 + 5) / √(2), 5 - 2(4 - 5) / √(2))
Now we can plot the original square ABCD and its image A'B'C'D' on the same graph to visualize the reflection.
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NEED HELP WITH FUNCTIONS HW
The possible exact values of the trigonometric functions of θ are:
sin θ = -1/√3, cos θ = √3/3, sec θ = √3
What is law sines?The law of sines, also known as the sine rule, is a mathematical principle that relates the sides and angles of a triangle. It states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is constant for all three sides of the triangle.
Trigonometric functions are mathematical functions that relate angles to the ratios of the sides of a right triangle. The six primary trigonometric functions are sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). Each function represents a different ratio of two sides of a right triangle and can be used to solve problems in geometry, physics, engineering, and other fields that involve angles and triangles.
According to the given information,
Given that tan θ = -√(1/3) and 0 < θ < 180°, we can use the trigonometric identities to find the values of the other trigonometric functions of θ.
First, we can use the definition of the tangent function:
tan θ = opposite/adjacent
Since tan θ = -√(1/3), we can assign opposite = -1 and adjacent = √3 as their ratio equals -√(1/3). This means that the terminal side of the angle θ will lie in the fourth quadrant of the unit circle since the opposite is negative and the adjacent is positive.
Next, we can use the Pythagorean identity:
sin²θ + cos²θ = 1
to find the value of sin θ. Since we know that θ is in the fourth quadrant, we can assign sin θ = -1/√3, since sin θ is negative in the fourth quadrant and the ratio of opposite/hypotenuse of a 30-60-90 triangle is √3/2, which means the ratio of hypotenuse/opposite is 2/√3 = √3/3.
Then, we can use the definition of the cosine function:
cos θ = adjacent/hypotenuse
to find the value of cos θ. We know that adjacent = √3 and the hypotenuse is positive (since it is a length), so we can assign cos θ = √3/3.
Finally, we can use the reciprocal identity:
sec θ = 1/cos θ
to find the value of sec θ. We know that cos θ = √3/3, so we can assign sec θ = √3.
Therefore, the possible exact values of the trigonometric functions of θ are:
sin θ = -1/√3
cos θ = √3/3
tan θ = -√(1/3)
sec θ = √3
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