The equation of the straight line would be -
y = 2x.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that a straight line passes through the points (2, 4) and (3, 6).
We can write the slope as -
m = (6 - 4)/(3 - 2)
m = 2/1
m = 2
For the point (2, 4), we can write -
y = 2x + c
c = 4 - 4
c = 0
Therefore, the equation of the straight line would be -
y = 2x.
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Question 6: What are the vertex and range of y = |x - 2 + 1? *
Answer:
Step-by-step explanation:
The vertex of the equation y = |x - 2 + 1| is (2, 1). The range of the equation depends on the value of x. When x < 2, the equation becomes y = -x + 1, which gives us a line with a slope of -1 that intersects the y-axis at (0,1) and has a minimum value of 1. When x >= 2, the equation becomes y = x - 1, which gives us a line with a slope of 1 that intersects the y-axis at (0,-1) and has no minimum value. Therefore, the range of the equation y = |x - 2 + 1| is [1, infinity).
On a recent math test, Alfred was asked to write an equation for the following problem:
Jenny bought 2 bags of carrots for her 6 rabbits. In the 2 bags of carrots, there are 52 carrots. How many carrots will each rabbit get if Jenny divides them equally for her 6 rabbits? Alfred wrote the expression: 52 ÷ 2. Is Alfred correct? Explain why or why not.
not much points but pls answer 14 points
10 x 10 divide 5.6 x 5
Answer: 4
Step-by-step explanation:
At a railway station, trains are either eastbound or westbound.
An eastbound train leaves the station every 25 minutes.
A westbound train leaves the station every 45 minutes.
An eastbound train and a westbound train both leave the station at 8 ar
When is the next time that two trains leave the station together?
If both bound trains leave together at 8, they will also start together at 11:45 the next time.
What is the LCM (least common multiple) of two numbers?The LCM of two numbers is the smallest possible number that is divisible by both of those two numbers. The prime factorization and the division methods are generally used to find the LCM.
An eastbound train leaves the station every 25 minutes whereas a westbound train leaves the station every 45 minutes.
These two types of trains will leave the station together if the time is divisible by both 25 and 45, that is, the LCM of them.
Find the LCM of 25 and 45 using the prime factorization method.
25=5×5
45=3×3×5
LCM(25,45)=3×3×5×5
=225
As 1 hour equals 60 minutes, it follows that 225 minutes equals 3 hours and 45 minutes.
If 3 hours 45 minutes is added to 8 hours, it will be 11 hours 45 minutes.
Therefore, the two trains leave the station together at 11 hours 45 minutes.
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Chandra just spends 15 minutes away or math problems she spends the same amount of time on each problem how many minutes does she spend on each problem
Chandra spends 3 minutes on each math problem if she spends a total of 15 minutes on math problems and spends the same amount of time on each problem
Chandra spends the same amount of time on each math problem. Let's call the amount of time she spends on each problem "t".
We know that Chandra spends a total of 15 minutes on math problems. If she spends the same amount of time on each problem, then the total time spent on all the problems is equal to the number of problems multiplied by the time spent on each problem.
So, we can write the following equation:
total time spent on all problems = number of problems * time spent on each problem
We know that the total time spent on all problems is 15 minutes, so we can substitute this into the equation:
15 = number of problems * t
We don't know the number of problems, but we can solve for t by rearranging the equation:
t = 15 / number of problems
So, the amount of time Chandra spends on each math problem is equal to 15 divided by the number of problems.
For example, if Chandra works on 5 math problems, then the amount of time she spends on each problem is:
t = 15 / 5 = 3
So, Chandra spends 3 minutes on each math problem if she spends a total of 15 minutes on math problems and spends the same amount of time on each problem.
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question which of the following must be true for an estimator of a population parameter to be unbiased? responses the sampling distribution of the estimator is normal. the sampling distribution of the estimator is normal. the expected value of the estimator is equal to the population parameter. the expected value of the estimator is equal to the population parameter. the sampling distribution of the estimator is the same shape as the distribution of the population parameter. the sampling distribution of the estimator is the same shape as the distribution of the population parameter. the variability of the sampling distribution of the estimator is equal to the variability of the population parameter. the variability of the sampling distribution of the estimator is equal to the variability of the population parameter. the variability of the sampling distribution of the estimator is less than the variability of the population parameter.
The second statement in your question is the correct response.
What is the sampling distribution?
A sampling distribution is the probability distribution of a statistic (such as the sample mean or sample proportion) based on all possible random samples of a fixed size from a population.
The following statement must be true for an estimator of a population parameter to be unbiased:
The expected value of the estimator is equal to the population parameter.
Hence, the second statement in your question is the correct response.
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Somebody please look at this picture and help me pleaseeeeeee
Answer:
I think it's
Step-by-step explanation:
usually involves reading the pattern on the table while keeping in mind that x goes on top and y on
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:
whats the answer to this question
Answer:
180 most likely
Yesterday, the price of a loaf of bread at five supermarkets was $1.54, $1.69,
$1.79, $1.57, and $1.71, but today each supermarket raised its price by $0.05.
What S
today's mean price of a loaf of bread at the five supermarkets?
• A. $1.71
• B. $1.66
• C. $1.76
• D. $1.81
Answer:
C.
Step-by-step explanation:
Multiply then divide
8. On the graph below, plot the points (-6,-6) and (6, 6). Find the distance
between the two points.
Answer:
You are correct it is 12.
Step-by-step explanation:
Answer: Square root of 288, or estimated 16.97
Step-by-step explanation:
Conveniently, the points form a diagonal line as you show, so we can use the Pythagorean Theorem to find the distance.
The x-component of this is the distance between -6 and 6, which is 12, and the y-component is again the distance between -6 and 6, which is also 12.
Therefore, the distance is the square root of 12^2 + 12^2, or the squareroot of 288.
Consider the information given in Example 3. Describe and correct the error in predicting the number (n) of students in the school who watch zero movies each week.
Answer:its hard to say
Which of the following is the correct order when multiplying 2 binomials
A. First, outer, inner, last
B. Inner, first, last, outer
C. Last, inner, outer, first
D. Outer, last, first, inner
Answer:
A. First, outer, inner, last.
Step-by-step explanation:
x f 20-24 2 15-19 5 10-14 4 5-9 1 for the distribution in table 2-3, what was the highest score obtained in this group of 12 scores? group of answer choices
The highest score obtained in this group of 12 scores is 19
What is the distribution in statistics?
In statistics, a distribution refers to the way in which a variable is spread out or distributed across different values. A distribution describes the probability of different outcomes for a variable, and can be visualized using graphs such as histograms, box plots, and probability density functions.
The distribution in Table 2-3 shows frequency (f) for different score ranges (x). Without knowing the exact scoring system, we can't say for certain what the highest score obtained in this group of 12 scores is. However, we can determine the upper limit of the highest score range by multiplying the upper limit of the range by its frequency:
Upper limit of 20-24 range = 24
Frequency of 20-24 range = 2
Upper limit of 15-19 range = 19
Frequency of 15-19 range = 5
Upper limit of 10-14 range = 14
Frequency of 10-14 range = 4
Upper limit of 5-9 range = 9
Frequency of 5-9 range = 1
To find the highest score, we need to determine the upper limit of the score range that has the highest frequency. In this case, the highest frequency is 5, which corresponds to the range 15-19.
Hence, the highest score range is 15-19, and the highest score within that range is the upper limit of that range, which is 19. So, the highest score obtained in this group of 12 scores is 19 (assuming the scoring system is such that higher scores correspond to higher ranges).
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(1 point) The expression 4^65536g³y² √√/65536g³y² equals kg³y³
where r, the exponent of g, is:
and s, the exponent of y, is:
and k, the leading coefficient is:
The 4 is the square root
The exponent of g, r, is -65536.
The exponent of y, s, is 1.
The leading coefficient, k, is 4.
Note: The expression 4^65536g³y² √√/65536g³y² is not equal to kg³y³, but instead represents the value of 4 raised to the power of 65536 times g raised to the power of -65536, divided by the square root of 65536 times g raised to the power of -65536 times y squared. The square root symbol is used twice, which is equivalent to taking the square root of the square root, or the fourth root.
ive tried many times on this but stilll wasnt sure
Hi there, here's your answer:
Given two trapeziums, ABCD and WXYZ, where ABCD ~ WXYZ.
To find:
Value of v.
Solution:
We see that 2 sides are equal for both the trapeziums and it appears that
when comparing these sides, the bigger sides which are equal are always a multiple of 5 of the smaller side.
Applying this to find the similarity of the other two sides which are not equal, we find that on comparing the sides that are known, the similar side for AB is WX and AB = 5 × WX.
Thus, using this we can find the value of v to be YZ × 5 = 10 × 5 = 50m
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A circular arc has measure 8 ft and is intercepted by a central angle of 2.9 radians. Find the radius r of the circle.
Do not round any intermediate computations, and round your answer to the nearest tenth.
The radius of the circle is 2.8feet (nearest tenth)
What is length of an arc?Arc length is the distance between two points along a section of a curve.
The length of an arc is expressed as ;
L = (tetha) / 360 × 2πr
L is the length of the arc
tetha is the angle made by the two radii and the arc.
In radian 360° = 2π
therefore ;
8 = 2.9/ 2π × 2πr
8 = 2.9 r
r = 8/2.9
r = 2.76 ft
therefore the radius of the circle is 2.8 feet( nearest tenth) .
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Using the omission strategy, what value would be placed in the missing observation in x1?
x1x2
76
22
82
91
32
41
88
Options:
84
No value because excluded
83
90
The values in the missing observation are:
X1 X2
76 22
82 25
91 32
101 41
88 28
What is an expression?An expression contains terms with addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
x1 x2
76 22
82 __
91 32
__ 41
88 28
The difference between each row are:
76 - 22 = 54
82 - 25 = 57
91 - 32 = 59
101 - 41 = 60
88 - 28 = 60
We see that,
57 - 54 = 3
59 - 57 = 2
60 - 59 = 1
60 - 60 = 0
So,
The difference between the numbers is consecutive as 3, 2, 1, 0.
Thus,
The missing values of X1 and X2 are 101 and 25.
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Suppose C(x)= x^2−13x+74 for 0 ≤ x ≤25 represents the marginal cost in hundreds of dollars to produce an additional x thousand pens. Find how many additional thousand pens can be produced with marginal cost of no more than $5,200. Write the largest interval containing all possible answers
Answer: 78.39 thousand, (78,390)
Step-by-step explanation:
Using the quadratic formula with this gives us two answers, 78.39 and -65.39. Since a negative answer doesnt make sense in this context, we will go with 78.39 thousand pens, (78,390 pens). The limit on x however doesn't seem to make sense as it says x </= 25 and x>/= 0. The only two answers are both above and below this limit.
you leave your house, travel one mile due south, then one mile due east, then one mile due north. you are now back at your house ! where do you live? there is more than one solution; find as many as possible.
There are infinitely many possible locations for your house that would allow you to travel one mile south, one mile east, and one mile north and end up back at your starting point.
As per the question given,
This is a classic puzzle known as the "One-Mile Puzzle". There are actually infinitely many possible locations for your house that satisfy these conditions.
One way to think about it is to consider the fact that the one-mile distances you traveled form the sides of a triangle. Since you traveled one mile due south, one mile due east, and one mile due north, the triangle you formed is an isosceles right triangle, with the right angle at the point where you ended up.
If you let (x, y) be the coordinates of your house, then the point where you ended up after traveling one mile south, one mile east, and one mile north is (x, y-1) + (1, y) + (x, y+1), which simplifies to (2x+1, 2y).
So, any point (x, y) that satisfies the equation 2x + 1 = 2y will work as a possible location for your house. For example:
If x = 0, then y = 1/2, so your house could be located at (0, 1/2).
If x = 1, then y = 3/2, so your house could be located at (1, 3/2).
If x = -1, then y = -1/2, so your house could be located at (-1, -1/2).
And so on...
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What is the slope of the line that passes
through the points (-4, 4) and (-1, 3)?
Write your answer in simplest form.
Answer:
the answer is : m= -1/3
Step-by-step explanation:
you need the steps?
a significance test about a proportion is conducted using a significance level of . the test statistic equals . the p-value is . a. if were true, for what probability of a type i error was the test designed? b. if this test resulted in a decision error, what type of error was it?
a) The test was designed to have a 5% chance of making a Type I error. b) Reject H0 since p-value < significance level. c) Type I error (false positive) if H0 is true and rejected.
A significance test is used to determine whether there is sufficient evidence to reject a null hypothesis, which is a statement about a population parameter, such as a proportion, mean, or standard deviation. The significance level, often denoted by α, is the probability of making a Type I error, which is rejecting the null hypothesis when it is actually true. The commonly used significance level is 0.05, which means that the test is designed to have a 5% chance of making a Type I error.
In this scenario, the sample proportion is 0.12 and the p-value is 0.03, which is the probability of observing a sample proportion as extreme as 0.12 or more extreme, assuming that the null hypothesis is true. Since the p-value is less than the significance level, we have strong evidence against the null hypothesis, and we reject it. Therefore, we conclude that the proportion is significantly different from the hypothesized value.
If the null hypothesis is actually true, and we reject it based on the sample data, we have made a Type I error. In other words, we have falsely concluded that there is a difference when there is not. False positive is another name for this mistake. Conversely, a Type II error occurs when we fail to reject the null hypothesis when it is actually false, and this error is also known as a false negative.
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The complete question is:
A significance level of 0.05 is used when conducting a proportion-related significance test. 0.12 is the sample statistic. P-value equals 0.03.
a) What chance of a Type I error was the test designed for, if H0 were true?
b) What judgement would you draw on this test (reject or fail to reject)?
c) What kind of error, if any, was there as a result of this test?
Pls help thank you will mark the Brainliest
Online math courses can also offer some benefits, such as the flexibility to work at your own pace and the ability to review lectures and assignments as needed. Overall, taking an online math course requires self-discipline, motivation, and a willingness to seek help when needed.
Describe Online classes?Online classes are virtual classrooms that offer students the opportunity to learn from anywhere, at any time, with a reliable internet connection. The primary focus of online classes is to provide students with the same level of academic instruction as they would receive in a traditional classroom setting. Many educational institutions and organizations offer online classes, including colleges, universities, and K-12 schools.
One of the significant advantages of online classes is that they offer flexibility, which means students can manage their coursework according to their schedule. Students can also access course material, lectures, and assignments from anywhere, which eliminates the need to attend a physical classroom. Online classes also offer students the ability to work at their own pace and review course material as often as they need to.
Online classes provide students with access to a wide range of educational resources, including video lectures, interactive quizzes, discussion forums, and other learning tools. Many online classes also provide students with personalized support, including one-on-one virtual sessions with instructors or teaching assistants.
Taking an online math course can be different from taking other subjects online. Typically, online math courses involve watching pre-recorded video lectures, completing online assignments, and participating in online discussions or forums. Online math courses may also use virtual tools, such as interactive graphs or calculators, to enhance the learning experience.
Compared to other online courses, learning math online may require more self-discipline and motivation, as it can be challenging to stay engaged with the material without the structure of a traditional classroom. Additionally, math is a subject that often builds on previous concepts, so it is essential to stay on top of the material and seek help if needed.
However, online math courses can also offer some benefits, such as the flexibility to work at your own pace and the ability to review lectures and assignments as needed. Overall, taking an online math course requires self-discipline, motivation, and a willingness to seek help when needed.
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Determine the solutions of the equation:
the absolute value quantity four thirds times x plus 2 end quantity minus 6 equals 0
The solutions of the given absolute value equation |4/3 x + 2| - 6 = 0 are x = 3 and x = -6.
What is Absolute Value Equations?Absolute value equations are kind of equations which includes the absolute value symbol in the expression.
For example : |x - 5| = 4 is an absolute value equation.
The given absolute value equation is,
four thirds times x plus 2 end quantity minus 6 equals 0.
|4/3 x + 2| - 6 = 0
Isolating the absolute value quantity on one side,
|4/3 x + 2| - 6 + 6 = 0 + 6
|4/3 x + 2| = 6
This can be written as,
4/3 x + 2 = 6 and 4/3 x + 2 = -6
Solving each of these,
4/3 x + 2 = 6
4/3 x = 4
x = 3
4/3 x + 2 = -6
4/3 x = -8
x = -6
Hence the value of x are 3 and -6.
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Please help!
The polygons in each pair are similar. Find the scale factor of the smaller figure to the larger figure.
The scale factor of the smaller figure to the larger figure in the first instance is 1. 25 .
The scale factor in the second instance is 3. 75 .
How to find the scale factor ?To find the scale factor, the formula is :
= Length of side of larger figure / Length of corresponding side of smaller figure
The scale factor in the first instance is :
= 30 / 24
= 1. 25
The scale factor in the second instance is :
= 15 / 4
= 3. 75
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help me solve this equation
The area of the shaded portion is 6x^2
How to determine this?
The area of the shaded portion = Area of big rectangle - Area of small rectangle.
To get the area of big rectangle = L * B
A = 2x * 4x
A = 8x^2
To get area of small rectangle = L * B
A = 2x * x
A = 2x^2
To get the area of shaded portion ,
= 8x^2 - 2x^2
= 6X^2
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1. Heights of kindergarteners follow an approximately normal distribution with mean = 40 inches and standard
deviation o-5.2 inches. Let be the sample mean height of 10 randomly selected kindergarteners.
(a) Describe the shape, center, and variability of the sampling distribution of for samples of size 10. Interpret the
standard deviation.
The shape of the sampling distribution will be approximately normal, with a center at 40 inches and a standard deviation of 1.645 inches.
What is the shape, center, and variability of the sampling distribution?The mean of the sampling distribution of the sample mean height for samples of size 10 will also be 40 inches.
The standard deviation of the sampling distribution of the sample mean height can be calculated as:
σ/sqrt(n) = 5.2/sqrt(10) = 1.645
So, the shape of the sampling distribution will be approximately normal, with a center at 40 inches and a standard deviation of 1.645 inches.
The variability of the sampling distribution is smaller than the variability of the population distribution, because the standard error is smaller than the population standard deviation. This means that the sample means are more likely to be closer to the population mean than the individual heights in the population.
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X is a normally distributed random variable with mean 25 and standard deviation 9.
What is the probability that X is less than 16?
The required probability that X is less than 16 is approximately 0.15866 or 15.86%.
What is the Z -a score?A Z-score is stated as the fractional model of data point to the mean using standard deviations.
Here,
We can use the standard normal distribution to find the probability that a normally distributed random variable, X, is less than a certain value. To use the standard normal distribution, we need to standardize X by subtracting the mean and dividing by the standard deviation:
Z = (X - μ) / σ
In this case, X has a mean of 25 and a standard deviation of 9,
Z = (16 - 25) / 9
z = -1
To find the probability that X is less than 16, we need to find the corresponding value of Z using the standard normal distribution table or a calculator.
P(Z < -1) ≈ 0.15866
Therefore, the probability that X is less than 16 is approximately 0.15866 or 15.86%.
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(15, 2); perpendicular to 5x - y = 2
(a) Write the equation of the line in slope-intercept form.
(b) Write the equation of the line in standard form.
Answer:
see explanation
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
given
5x - y = 2 ( subtract 5x from both sides )
- y = - 5x + 2 ( multiply through by - 1 )
y = 5x - 2 ← in slope- intercept form
with slope m = 5
(a)
given a line with slope m then the slope of a line perpendicular to it is
[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{5}[/tex] , then
y = - [tex]\frac{1}{5}[/tex] x + c ← is the partial equation
to find c substitute (15, 2 ) into the partial equation
2 = - [tex]\frac{1}{5}[/tex] (15) + c = - 3 + c ( add 3 to both sides )
5 = c
y = - [tex]\frac{1}{5}[/tex] x + 5 ← in slope- intercept form
(b)
the equation of a line in standard form is
Ax + By = C ( A is a positive integer and B, C are integers )
y = - [tex]\frac{1}{5}[/tex] x + 5 ( multiply through by 5 to clear the fraction )
5y = - x + 25 ( add x to both sides )
x + 5y = 25 ← in standard form
three numbers a, b, and c between 0 and 1 are selected independently and at random. what is the probability that these numbers appear in increasing order?
The probability of selecting three numbers in increasing order is 1/3, which means that in one out of every three trials, we will select three numbers in increasing order.
Probability is a branch of mathematics that deals with the measurement of the likelihood or chance of an event occurring. In this problem, we are asked to find the probability of selecting three numbers in increasing order from a range of 0 to 1.
Let's compute the probability of selecting three numbers in increasing order. Since the total number of possible outcomes is infinite, we need to use a continuous probability distribution to compute the probability. In this case, we can use the uniform distribution, which assumes that each number between 0 and 1 is equally likely to be selected.
The probability of selecting "a" as the smallest number is a/1 = a.
The probability of selecting "a" as the largest number is (1-a)/1 = 1-a.
The probability of selecting "a" as the middle number is 2(1-a)a, which is the product of the probability of selecting "a" and the probability of selecting "b" or "c" from the remaining range.
Therefore, the probability of selecting three numbers in increasing order is the sum of these probabilities:
P(increasing order) = ∫₀¹ (a * (1 - a) + (1 - a) * a + 2a(1 - a))da
P(increasing order) = ∫₀¹ 2a(1 - a)da
P(increasing order) = 2∫₀¹ a - a²da
P(increasing order) = 2[(a²/2) - (a³/3)] from 0 to 1
P(increasing order) = 2[(1/2) - (1/3)] = 1/3
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