Answer:
To solve this problem, we need to start by setting up an equation. The equation should express the fact that the result of the two operations on the fractions is both 4 and 5/4.
We can do this by writing:
4x/(x-2) = 4
5x/2(x-2) = 5/4
Solving for x, we get x=16. Therefore, the fraction we are looking for is 4/14, since 4 times 16 divided by 16 minus 2 equals 4 and 5 times 16 divided by 2 times 16 minus 2 equals 5/4.
The table below shows the linear relationship between
the number of people at a picnic and the total cost of the
picnic.
Number of People
6
9
12
Intro
15
Total Cost ($)
52
58
64
70
Which statements about the function described by the
table are true? Check all that apply.
The independent variable is the number of people.
The initial value (initial fee) for the picnic is $40.
The rate of change is $8.67 per person.
As the number of people increases, the total cost of
the picnic increases.
If 4 people attended the picnic, the total cost would
be $46.
Done
The initial value (initial fee) for the picnic is $40. Then the correct options are A, B, and D.
What is the equation of a line passing through two points?Let the equation of the line pass through (x₁, y₁) and (x₂, y₂). Then the equation of the line is given as,
[tex]\rm (y - y_2) = \left (\dfrac{y_2 - y_1}{x_2 - x_1} \right ) (x - x_2)[/tex]
Let 'x' be the number of people and 'y' be the total cost.
From the table, the two points are (6, 52) and (9, 58). Then the equation of the line is given as,
(y - 52) = [(58 - 52) / (9 - 6)](x - 6)
y - 52 = 2x - 12
y = 2x + 40
The initial value (initial fee) for the picnic is $40. Then the correct options are A, B, and D.
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What is an example of multi stage sampling?
Multistage sampling is a probability sampling technique that involves sampling in stages or multiple steps. In this technique, a large population is divided into smaller subgroups, and then a random sample is selected from each subgroup.
Here is an example of multistage sampling:
Suppose we want to conduct a study on the prevalence of a certain disease among high school students in a particular country. The population of high school students in the country is very large, so it is not feasible to sample all of them. Instead, we can use multistage sampling to select a representative sample.
In the first stage, we randomly select a certain number of schools from different regions of the country. Let's say we select 20 schools.
In the second stage, we randomly select a certain number of classes from each of the selected schools. Let's say we select 2 classes from each of the 20 schools, resulting in a total of 40 classes.
In the third stage, we randomly select a certain number of students from each of the selected classes. Let's say we select 10 students from each of the 40 classes, resulting in a total of 400 students.
This process of selecting a sample in stages is an example of multistage sampling. By selecting schools, classes, and students in a random and systematic way, we can obtain a representative sample of high school students in the country, which can be used to estimate the prevalence of the disease.
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Easy Question
A researcher found that students who spent more time exercising each week also had higher average test scores. Describe the correlation, if any, between time spent exercising and test scores.
The correct answer is a) No you cannot, because the lower boundary of the confidence interval is .131, which is less than .30, and so the true correlation could be less than .30.
What is the correlation analysis?Correlation analysis allows us to examine the strength, direction, and nature of the relationship between two variables, and to determine whether or not there is a statistically significant association between them.
Based on the information given, there appears to be a positive correlation between time spent exercising and test scores. This means that as the time spent exercising increases, the test scores also tend to increase. However, we cannot determine the strength or causality of this correlation without additional information or analysis. It is possible that other factors could be influencing both variables or that there could be confounding variables affecting the relationship.
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Correct question:
Assume a researcher found that the correlation between a test she had developed and exam performance was .5 in a study of 25 students. She had previously been informed that correlations under .30 are considered unacceptable. The 95% confidence interval was [0.131, 0.747]. Can you be confident that the true correlation is at least 0.30?
No you cannot, because the lower boundary of the confidence interval is .131, which is less than .30, and so the true correlation could be less than .30.Yes you can, because the correlation coefficient is .5 (which is above .30) and falls within the boundaries of the confidence interval.No you cannot, because the sample size was too small. Yes you can, because the upper boundary of the confidence interval is above .30 we can be 95% confident that the true correlation will be above .30By rounding to one significant figure estimate the answer to 49x138
can factorials with algebraic expressions still be correct if you substitute the letter with a number
factorials with algebraic expressions still be correct if you substitute the letter with a number.
What are factorials?Factorial is a mathematical operation denoted by the exclamation mark (!). It is used to find the product of all positive integers from 1 to a given number. For example, the factorial of 4 (written as 4!) is:
4! = 4 × 3 × 2 × 1 = 24
Given by the question.
if you substitute a numerical value for the algebraic expression, the resulting factorial can be computed and evaluated as a numerical expression.
For example, consider the factorial expression n! where n is an algebraic expression such as n = x + 2. Substituting a numerical value for x, say x = 3, we get n = 3 + 2 = 5, and hence we can compute 5! = 5 x 4 x 3 x 2 x 1 = 120.
Similarly, if we have an expression like (n+1)! /(n-1)! where n is an algebraic expression, we can substitute a numerical value for n and compute the resulting value. For example, if we substitute n = 4, we get (4+1)!/(4-1)! = 5!/3! = (5 x 4 x 3 x 2 x 1)/(3 x 2 x 1) = 60.
It's important to note that substituting numerical values for algebraic expressions only works if the resulting expression is well-defined and doesn't lead to any undefined or indeterminate forms (such as division by zero).
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Solve for the equation below PLEASE
Solving the Question
[tex]\dfrac{2}{3}x=6[/tex]
Our goal is always to isolate x.We can do that by performing inverse operations⇒ ex. the inverse of addition is subtractionHere, we have to get rid of the [tex]\dfrac{2}{3}[/tex] by dividing both sides by it.[tex]\dfrac{\frac{2}{3}x}{\frac{2}{3}}=\dfrac{6}{\frac{2}{3}}\\\\x=\dfrac{6}{\frac{2}{3}}\\\\x=6\div\dfrac{2}{3}[/tex]
Dividing by a fraction is the same as multiplying by its reciprocal:[tex]x=6\times\dfrac{3}{2}\\\\x=\dfrac{18}{2}\\\\x=9[/tex]
Answerx = 9
The following are characteristics of a normal curve except for three. Determine which of the following are not characteristic of a normal curve. I. The mode and median occur at µ. II. The curve is symmetric about the vertical axis through the mean µ. III. The normal curve is asymptotic to the vertical axis on both sides. IV. The total area under the curve and above the vertical axis is equal to 1. V. The probability that the normal random variable is equal to a specific discrete value is always zero, since the normal random variable is continuous. VI. The probability that the normal random variable is between two values is given by the area under the curve between the two given values and the vertical axis. A. VI,I,II B. III,IV,VI C. I,V,II D. II,IV,VI
The statements that are not characteristics of a normal curve are III, IV, and VI. The answer is B.
A normal curve is a bell-shaped probability distribution that is commonly used in statistics. It has several key characteristics that make it useful in modeling real-world data. These include the fact that the mode and median occur at the mean, the curve is symmetric about the mean, and the total area under the curve and above the horizontal axis is equal to 1.
In addition, the normal curve is asymptotic to the horizontal axis on both sides. However, not all normal curves are asymptotic to the horizontal axis on both sides, as this is only true for curves with a finite standard deviation.
Finally, the probability that a normal random variable is equal to a specific discrete value is always zero, since the normal variable is continuous, and the probability that the variable is between two values is given by the area under the curve between those values and the horizontal axis.
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If it took 4 hours to mow 7 lawns, then at that rate, how many lawns could be mowed in 16 hours?
Answer:
28 lawns
Step-by-step explanation
If there is 7 lawns for 4 hours there will be 14 lawns in 8 hours. and 28 lawns in 16 hours
Anyone help me with this geometry hw?
The circles with the specified angle of internal sectors, indicates that we get the following arc and radial lengths;
2. m∠ADC = 160°
m∠BDC = 160°
3. Length of [tex]\widehat{CB}[/tex] ≈ 11.17 inches
4. Length of [tex]\widehat{ABC}[/tex] ≈ 13.96 inches
5. a. The radius of ⊙ Q ≈ 14.324 inches
What is the radius of a circle?The radius is the straight line extending from the circle center to the circumference. The radius is the shortest distance from the circle center to the circumference of the circle.
Angle ∠ADC is congruent to ∠BDC in the circle with center D
∠ADC ≅ ∠BDC
2. ∠ADC ≅ ∠BDC, therefore;
m∠ADC = m∠BDC
The angle sum property of the angle at the center of a circle, indicates that we get;
40° + m∠ADC + m∠BDC = 360°
Therefore by plugging in m∠ADC = m∠BDC, we get;
40° + m∠ADC + m∠ADC = 360° (substitution property)
40° + 2 × m∠ADC = 360°
2 × m∠ADC = 360° - 40° = 320°
m∠ADC = 320° ÷ 2 = 160°
m∠ADC = 160° = m∠BDC
m∠BDC = 160°
3. The length of the arc [tex]\widehat{CB}[/tex], can be obtained from the proportion of the circumference of the circle D represented by the sector BDC as follows;
Length of the arc [tex]\widehat{CB}[/tex] = ((m∠BDC)/360°) × 2·π·r
Where;
r = The radius of the circle
The radius of the circle, r = 4 inches
Therefore; Length of the arc [tex]\widehat{CB}[/tex] = (160°/360°) × 2 × π × 4 ≈ 11.17
The length of the arc [tex]\widehat{CB}[/tex] ≈ 11.17 inches4. The length of the arc [tex]\widehat{ABC}[/tex] can be found as follows;
The angle at the center of the arc [tex]\widehat{ABC}[/tex] = 40° + m∠BDC
Therefore; The angle at the center of the arc [tex]\widehat{ABC}[/tex] = 40° + 160° = 200°
Length of [tex]\widehat{ABC}[/tex] = (200°/360°) × 2 × π × 4 inches ≈ 13.96 inches5. The length of the arc [tex]\widehat{AB}[/tex] = 15 inches
The angle formed by the sides AQ and BQ of the sector AQB = 60°
Therefore, we get;
length of the arc [tex]\widehat{AB}[/tex] = (60°/360°) × 2 × π × r = 15 inches
r = 15/((60°/360°) × 2 × π) ≈ 14.324
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Triangle ABC is similar to triangle FGH. Given the following angle measures, find the missing angle measures.
m∠A = 63 degrees
m∠B = 82 degrees
Enter your answers as numbers only.
The measure of the angle m∠C = m∠H is equal to 35°.
What is congruency?We know two similar planer figures are congruent when we have sides or angles or both that are the same as the corresponding sides or angles or both.
Given, Triangle ABC is similar to triangle FGH.
Therefore, m∠A = m∠F = 63° and m∠B = m∠G = 82°.
We know the sum of the measure of all the interior angles in a triangle is 180°.
Therefore, m∠C = m∠H = 180° - 63° - 82° = 35°.
Congruency can be applied to any two dimensional figure, For example,
Two circles are congruent if they have the same radius length.
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What is the value of 240 inches in feet?
Answer:
Step-by-step explanation:20
Audrey and David are reading the same book. Audrey reads 40 pages each day.
David reads 20 pages each day.
Which of the following is a true statement about the number of pages Audrey and David have read after each day?
Select all that apply.
A.
Audrey has always read twice as many pages as David.
B.
After 6 days, Audrey and David have read the same total number of pages.
C.
Audrey has always read a total of 20 pages more than David.
D.
After 2 days, Audrey has read 40 more pages than David.
E.
After 3 days, Audrey has read three times as many pages as David.
ITS MULTIPLE CHOICE BTW
Distribute Solve for the variables 2(y+6)=8
The value of y is -2.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
2 (y + 6) = 8
Using the distributive operation of multiplication over addition.
2y + 12 = 8
2y = 8 - 12
2y = -4
y = -2
Thus,
y = -2.
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I will give you a Brainliest
Answer:
B isa the answer for me it might be wrong for you or switch them
Step-by-step explanation:
Find integer matrices A,B not multiples of each other such that Nul(A)=Nul(B) and Col(A)=Col(B)
Nul(A) = Nul(B) , Col(A) = Col(B) in integer matrices.
Describe matrix using an example?
A matrix is a collection of numbers that have been put in rows and columns to make a rectangular array. The entries of the matrix are the numbers, which are referred to as its elements.
In addition to many other areas of mathematics, matrices have extensive applications in the fields of engineering, physics, economics, and statistics.
The null space of any matrix A consists of all the vectors
X such that Ax = 0
And the column space of a matrix A is the span of its column vectors.
Let A = [tex]\left[\begin{array}{ccc}1&0&0 \\0&1&0\\0&0&1\end{array}\right][/tex]
Therefore, Nul(A) = {(0,0,0,w ) w∈ Z }
Col(A) = span{ (1,0,0), (0,1,0) , (0,0,1) }
By using definition of Null space of matrix and column space of matrix.
Let B = [tex]\left[\begin{array}{ccc}1&1&0\\0&1&0\\0&0&1\end{array}\right][/tex]
Nul(A) = {(0,0,0,w ) w∈ Z }
Col(A) = span{ (1,0,0), (0,1,0) , (0,0,1) }
Hence Nul(A) = Nul(B) , Col(A) = Col(B)
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Write the prime factorization of 35. Use exponents when appropriate and order the factors from least to greatest (for example, 2².3.5).
The prime factorization of 35 is 5 * 7
How to determine the prime factorization of 35From the question, we have the following parameters that can be used in our computation:
Number = 35
Express 35 as the product of its factors
So, we have the following representation
Number = 5 * 7
None of the factors 5 and 7 can be further simplified
This means that the prime factorization of 35 is 5 * 7
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a unit of measurement equal to one thousand meters is_____
A unit of measurement which is equal to one thousands meters is known as one kilometers.
Different units of measurements are meters , kilometers, centimeters, millimeters and so on.Measuring small length basically we use centimeters and very small length in millimeters.Measuring medium length we use unit known as meters.When we have measure long distance unit which is used is known as kilometers.Relation between different units of length are:1centimeters is equal to 10 millimeters1 meter is equal to 100 centimeters1 kilometers is equal to 1000 metersTherefore, the given units of measurement equal to one thousand meters is called one - kilometers.
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$47,000 a year is how much an hour?
A yearly salary of $47,000 is equivalent to an hourly rate of approximately $22.60 per hour.
To convert a yearly salary to an hourly rate, you need to divide the annual salary by the number of working hours in a year.
Assuming a typical workweek of 40 hours and 52 weeks in a year, the total number of working hours in a year is:
40 hours/week x 52 weeks/year = 2,080 hours/year
To calculate the hourly rate for a yearly salary of $47,000, you can divide the annual salary by the total number of working hours in a year:
$47,000 / 2,080 hours = $22.60 per hour
Therefore, a yearly salary of $47,000 is equivalent to an hourly rate of approximately $22.60 per hour.
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jacinda divides 19 cookies into 5 equal piles, using as many cookies as possible, but has some left over, how many are left?
Answer: Jacinda has 4 cookies left over.
Step-by-step explanation:
If Jacinda divides 19 cookies into 5 equal piles using as many cookies as possible, but has some left over, we can use integer division to determine how many cookies are in each pile. Integer division divides two numbers and rounds down to the nearest integer. In this case, the number of cookies in each pile is:
19 cookies ÷ 5 piles = 3 with a remainder of 4
Answer: 4
Step-by-step explanation:
Based on the given conditions, formulate: 19-5
Calculate the sum or difference: 14
How do you find the symmetry of a distribution?
Analyzing a distribution's form and the placements of its mean, median, and mode in relation to one another can reveal its symmetry.
Therefore by analyzing a distribution's form and the placements of its mean, median, and mode in relation to one another can reveal its symmetry. The following techniques can be used to determine a distribution's symmetry: Examining a distribution's histogram, box plot, or probability density function visually is one technique to identify a distribution's symmetry. If the distribution's shape appears to be symmetrical, it probably is. The subjective nature of this approach means that it might not give an accurate indication of symmetry.
Skewness is a measurement of a distribution's asymmetry. It may be calculated manually or with the aid of statistical tools. Examining a distribution's histogram, box plot, or probability density function visually is one technique to identify a distribution's symmetry. If the distribution's shape appears to be symmetrical, it probably is. Skewness is zero for a symmetric distribution. When the skewness is positive, the distribution is skewed to.
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Sale! 50% OFF
of the original price!
If a tent has a sale price of $39, what was the original price?
Answer:is this real
Step-by-step explanation:
1 =727
Write an expression for C less than the product of k and y
Answer:
ky - c
Step-by-step explanation:
K(Y) - C
(K*Y) - C
suppose that a classroom has 4 light bulbs. the probability that each individual light bulb works is 0.25. suppose that each light bulb works independently of the other light bulbs. what is the probability that all four of the light bulbs work?
The Probability that all four of the light bulbs work is 0.004 approx.
The probability that all four light bulbs work can be calculated by taking the product of the probability that each individual light bulb works. If each light bulb works independently of the other light bulbs, then the probability that all four light bulbs work is:
P(all 4 bulbs) = P(bulb 1) * P(bulb 2) * P(bulb 3) * P(bulb 4)
P(all 4 bulbs) = 0.25 * 0.25 * 0.25 * 0.25
P(all 4 bulbs) = 0.25^4
P(all 4 bulbs) = 0.00390625
So, the probability that all four light bulbs work is 0.00390625 or approximately 0.004.
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NATURE The locations of wildflowers and honeybee hives were plotted on a coordinate plane.
A beehive is located at (3, 7)
and its bees were found visiting flowers as far as a flower patch located at (−1, 2)
. The equation that models the circumference of the circular area the bees were foraging in is
(x− ?)^2+(y−?)^2=?
.
The equation of the circle that models the circumference of the circular area the bees were foraging in is given as follows:
(x - 3)² + (y - 7)² = 41.
What is the equation of a circle?The equation of a circle of center [tex](x_0, y_0)[/tex] and radius r is given by:
[tex](x - x_0)^2 + (y - y_0)^2 = r^2[/tex]
A beehive is located at (3, 7), hence the center is located at (3,7), thus:
(x - 3)² + (y - 7)² = r².
The farthest patched was located at (-1,2), hence the radius is obtained as follows:
(-1 - 3)² + (2 - 7)² = r²
r² = 41.
Hence the equation is:
(x - 3)² + (y - 7)² = 41.
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How can I find the variable for this?
The values of x is 13.42, y is 12 and z is 26.83 for right angle triangle ABC shown below.
Describe the term right angle triangle?The Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides, is a fundamental property of right triangles.
By the figure apply Pythagorean theorem in right angle ΔABC;
x² + z² = (24+6)² = 30²
x² + z² = 900 (eq. 1)
Apply Pythagorean theorem in right angle ΔAEB;
y² + 24² = z²
z² - y² = 576 (eq. 2)
Apply Pythagorean theorem in right angle ΔAEC;
y² + 6² = x²
x² - y² = 36 (eq. 3)
subtract eq. 2 and 3; then we get,
z² - x² = 540 (add this eq. with eq. 1)
2z² = 1440
z = √720 = 26.83
put in eq. 1
x² + 720 = 900
x = √180 = 13.42
put x value in eq. 3
180 - y² = 36
y = 12
Therefore, the values of x is 13.42, y is 12 and z is 26.83
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Jeanne has a piece of fabric in the shape of a square. She wants to cut the fabric in the shape of a circle.
The approximate area of the remaining part of the fabric is given as 17.415 square feet
How to solve for the area of the remaining fabricTo get the solution, we have to solve for the area of the square shape and the area of the circle
The area of a square is given as A = a²
The area of a circle is given as πr²
We would have area of remaining fabric as
a² - πr²
The square has its sides as a = 9 cm
the circle has π = 3.14
we are to find the radius. But first we have to determine the diameter
The circle runs from one end of the square to the other end. This should be the diameter, because it is the length of the square as well
Diameter = 9 cm
radius = diameter / 2
= 9 / 2
= 4.5
When we put the values in the formula a² - πr² we would have
9² - 3.14 * 4.5²
81 - 3.14 * 20.25
81 - 63.585
= 17.415
The area of the remaining part after the circle is cut is 17.415 square feet
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A Plus Landscaping Company has a big job where they need 83 bushes and 22 trees.They need to compare the costs from two similar suppliers; Pinedale Plants and Sierra Shrubs. Last month A Plus Landscaping placed two orders with Pinedale Plants. The first order was for 10 bushes and 5 trees and totaled $393.6 before taxes. The second order was for 5 bushes and 2 trees and totalled $177.32 before taxes. The bills from Pinedale Plants do not list the per-item price. A Plus Landscaping has an offer from Sierra Shrubs where similar bushes cost $18.27 and trees cost $41.96.
Answer: To compare the costs between the two suppliers, we need to find the total cost of 83 bushes and 22 trees from each supplier.
For Pinedale Plants:
The first order was for 10 bushes and 5 trees, so the cost per bush is $393.6 / 10 = $39.36.
The second order was for 5 bushes and 2 trees, so the cost per bush is $177.32 / 5 = $35.464.
To find the average cost per bush from Pinedale Plants, we can take the average of the two costs: ($39.36 + $35.464) / 2 = $37.412
The total cost from Pinedale Plants for 83 bushes would be 83 * $37.412 = $3108.976
The total cost from Pinedale Plants for 22 trees would be 22 * $35.464 (since the cost per tree was not specified), which is $777.75
The total cost from Pinedale Plants for 83 bushes and 22 trees would be $3108.976 + $777.75 = $3886.726
For Sierra Shrubs:
The cost per bush from Sierra Shrubs is $18.27
The total cost from Sierra Shrubs for 83 bushes would be 83 * $18.27 = $1510.01
The cost per tree from Sierra Shrubs is $41.96
The total cost from Sierra Shrubs for 22 trees would be 22 * $41.96 = $923.12
The total cost from Sierra Shrubs for 83 bushes and 22 trees would be $1510.01 + $923.12 = $2433.13
So, we can see that the total cost from Sierra Shrubs for 83 bushes and 22 trees is lower than the total cost from Pinedale Plants. The company would save $3886.726 - $2433.13 = $1453.596 by ordering from Sierra Shrubs.
Step-by-step explanation:
Find each trigonometric ratio. Give your answer as a fraction
Show proofs
Help urgent
The side length QR = 34 derived using the Pythagoras rule, and the following are the values of the trigonometric ratio:
sin Q = 30/34, cos Q = 16/34 , tan Q = 30/16, sin Q = 30/34, cos Q = 16/34, and tan Q = 30/16
What is the Pythagoras ruleThe Pythagoras rule states that in a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
QR² = 16² + 30²
QR = √(256 + 900) {take square root of both sides}
QR = √1156
QR = 34
since we have QR = 34, RS = 30, and SQ = 16, then:
Considering the angle Q for the right triangle;
sin Q = 30/34 {opposite/hypotenuse}
cos Q = 16/34 {adjacent/hypotenuse}
tan Q = 30/16 {opposite/adjacent}
Considering the angle R for the right triangle;
sin R = 16/34 {opposite/hypotenuse}
cos R = 30/34 {adjacent/hypotenuse}
tan R = 16/30 {opposite/adjacent}
Therefore, the side length QR = 34 derived using the Pythagoras rule, and the following are the values of the trigonometric ratio:
sin Q = 30/34, cos Q = 16/34 , tan Q = 30/16, sin Q = 30/34, cos Q = 16/34, and tan Q = 30/16.
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Determine the slope and y-intercept of the line that passes through the points (14, -2) and (5,13)
Answer:
m = -5/3
Y-intercept: (0, 64/3)
Step-by-step explanation:
Slope = rise/run or (y2 - y1) / (x2 - x1)
Points (14, -2) and (5,13)
We see the y increase by 15 and the x decrease by 9, so the slope is
m = -15/9 = -5/3
The y-intercept is located at ( 0, 64/3)
Please answer this question for me
Thanks!
According to hing theorem, the following inequalities describe each triangle:
x < 2x > 3x < 8How to use the hing theorem in geometrical systemsAccording to Euclidean geometry, the hing theorem states that if two triangles with two pairs of congruent sides and the former triangle has larger internal angle, then the third side of the former triangle is longer than the third side of the latter triangle.
Mathematically speaking, the relationship between the third can be expressed in terms of inequalities. Now we proceed to express the inequalities in terms of variable x for each case below:
3 · x + 4 < 10The letter e has been eliminated from hing[e] due to profanity detector.
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