1/4+1/5+1/6=1/x
LCM = 60
15/60+12/60+10/60=1/x
37/60=1/x
37x=60
x=60/37=1.62, round =1.6
1.6 HOURS
The number of hours they would take them all working together is around 1.6 hours.
What are ratios and proportions?A ratio is the divide of the two variables and the lower variable known as the denominator should not be zero.
Given that laine takes 4 hours to complete work
In 1 hour Laine will do 1/4 part of the work.
In 1 hour Leslie will do 1/5 part of the work.
In a 1-hour Lance will do 1/6 part of the work.
so let's suppose all done work by x hours then
1/4 + 1/5 + 1/6 = 1/x
x =1.6 so all together done the work by 1.6 hours.
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Which is greater? 800 m or 799,999 mm
Answer:
800m
Step-by-step explanation:
Answer:
799,9999 is gearter
Step-by-step explanation:
ok is that ur answer to your question
Discrete math proof
Theorem: 0.1 Let a and n be positive natural numbers. Then the following statements are equivalent. • GCDa, n) = 1 (Relatively Prime) a is not a zero divisor. (ab = 0) b=0) There exists a natural nu
The theorem states that for positive natural numbers a and n, the statements "GCD(a, n) = 1" (a and n are relatively prime), "a is not a zero divisor," and "there exists a natural number b such that ab ≡ 1 (mod n)" are all equivalent.
How to find the equivalent statements in the theorem regarding positive natural numbers a and n?The theorem establishes the equivalence of three statements concerning positive natural numbers a and n. Firstly, if the greatest common divisor (GCD) of a and n is 1, it indicates that a and n are relatively prime.
This means that they have no common factors other than 1.
The second statement states that if a is not a zero divisor, then it implies that a multiplied by any nonzero element b is not equal to zero. In other words, a does not "annihilate" any nonzero element in multiplication.
Lastly, the theorem asserts that if there exists a natural number b such that ab ≡ 1 (mod n), it signifies the existence of a multiplicative inverse of a modulo n.
This means that a and n have a modular inverse, which is a natural number that, when multiplied by a, gives a remainder of 1 when divided by n.
The theorem shows that these three statements are equivalent, meaning that if one statement is true, then the other two statements will also hold.
The proof of this theorem involves establishing the logical connections between these statements and demonstrating that they are always true under the given conditions.
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P l e a s e a n s w e r t h i s
Answer : 1/2 gallon
Explanation:
There were a total of 5 gallons collected, as the question states.
There are 3 x's above 1/4, 2 x's above 3/8, 4 x's above 5/8 and 1 x above 1. This is a total of
3+2+4+1 = 10 x's. This means there were 10 trees.
If 5 gallons is evenly distributed among 10 trees, this would give us the ratio 5/10, which simplifies to 1/2 gallon per tree.
....this answer is not from me. The same question was asked on brainy and I've copy pated it, it is the right answer tho. Credit goes to "MsEHolt" for answering.
In a particular chi-square goodness-of-fit test, there are six categories and 575 observations. Use the 0.02 significance level. a. How many degrees of freedom are there? Degrees of freedom 5 es b. What is the critical value of chi-square? (Round your answer to 3 decimal places.) Critical value 9.837
a. There are 5 degrees of freedom in the data
b. The critical value represents the value beyond which the test statistic must exceed to reject the null hypothesis.
How many degrees of freedom are there?In a chi-square test, the degrees of freedom (df) can be calculated as (number of categories - 1). In this case, there are six categories, so the degrees of freedom would be:
df = 6 - 1
df = 5
Therefore, there are 5 degrees of freedom.
To find the critical value of chi-square at a significance level of 0.02 and 5 degrees of freedom, you can refer to a chi-square distribution table or use a statistical calculator. The critical value represents the value beyond which the test statistic must exceed to reject the null hypothesis.
For a significance level of 0.02 and 5 degrees of freedom, the critical value of chi-square is approximately 9.837 (rounded to 3 decimal places).
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State whether or not the following triangles are similar. If not, explain why not. If so, write a similarity statement
9514 1404 393
Answer:
a) ∆RLG ~ ∆NCP; SF: 3/2 (smaller to larger)
b) no; different angles
Step-by-step explanation:
a) The triangles will be similar if their angles are congruent. The scale factor will be the ratio of any side to its corresponding side.
The third angle in ∆RLG is 180° -79° -67° = 34°. So, the two angles 34° and 67° in ∆RLG match the corresponding angles in ∆NCP. The triangles are similar by the AA postulate.
Working clockwise around each figure, the sequence of angles from lower left is 34°, 79°, 67°. So, we can write the similarity statement by naming the vertices in the same order: ∆RLG ~ ∆NCP.
The scale factor relating the second triangle to the first is ...
NC/RL = 45/30 = 3/2
__
b) In order for the angles of one triangle to be congruent to the angles of the other triangle, at least one member of a list of two of the angles must match for the two triangles. Neither of the numbers 57°, 85° match either of the numbers 38°, 54°, so we know the two triangles have different angle measures. They cannot be similar.
For the following linear operators T: R2→R2
T(x, y)=(3x+3y, x+5y)
Find:
Subtask (1). All eigenvalues and a basis for each eigenspace.
Subtask (2). A basis for each eigenspace.
Subtask (3). Find a maximum set S of linearly independent eigenvectors of T.
Subtask (4). Is T diagonalizable? If yes, find P such that D=P-1[T]P is diagonal the diagonal representation of a matrix representation of T. Here [T] is the matrix representation of T in usual basis.
T is diagonalizable, and the matrix P = [(1, -3), (1, 1)] is the transformation matrix that diagonalizes T. The diagonal matrix D is D = [(7.5, 22.5), (2.5, 7.5)].
To find the eigenvalues and eigenvectors of the linear operator T: R2 → R2 given by T(x, y) = (3x + 3y, x + 5y), we can follow the steps outlined in the subtasks.
Subtask (1): Finding Eigenvalues and Eigenvectors
To find the eigenvalues, we need to solve the equation (T - λI)v = 0, where λ is the eigenvalue, I is the identity matrix, and v is the eigenvector.
Let's set up the equation:
(T - λI)v = 0
[(3x + 3y) - λx, (x + 5y) - λy] = [0, 0]
Expanding the equations, we get:
(3 - λ)x + 3y = 0 ...(1)
x + (5 - λ)y = 0 ...(2)
For nontrivial solutions (v ≠ 0), the determinant of the coefficient matrix must be zero. So we have:
[tex](3 - \lambda)(5 - \lambda) - 3 = 0\\(15 - 8 \lambda + \lambda^2) - 3 = 0\\ \lambda^2 - 8 \lambda+ 12 = 0\\( \lambda - 6)( \lambda - 2) = 0[/tex]
Solving for λ, we find two eigenvalues:
λ1 = 6 and λ2 = 2
For each eigenvalue, we need to find the corresponding eigenvectors by substituting back into equations (1) and (2).
For λ1 = 6:
From equation (1): (3 - 6)x + 3y = 0
-3x + 3y = 0
x = y
So, the eigenvector corresponding to λ1 = 6 is v1 = (1, 1).
For λ2 = 2:
From equation (1): (3 - 2)x + 3y = 0
x + 3y = 0
x = -3y
So, the eigenvector corresponding to λ2 = 2 is v2 = (-3, 1).
Subtask (2): Basis for Each Eigenspace
The eigenspace corresponding to an eigenvalue λ is the set of all eigenvectors associated with that eigenvalue. To find a basis for each eigenspace, we can take linearly independent eigenvectors.
For λ1 = 6, the eigenspace is spanned by the eigenvector v1 = (1, 1).
For λ2 = 2, the eigenspace is spanned by the eigenvector v2 = (-3, 1).
Subtask (3): Maximum Set of Linearly Independent Eigenvectors
The maximum set S of linearly independent eigenvectors can be formed by taking one eigenvector from each distinct eigenvalue. In this case, S = {v1, v2} = {(1, 1), (-3, 1)}.
Subtask (4): Diagonalizability
To check if T is diagonalizable, we need to determine if there exists a basis for R2 consisting of eigenvectors of T. If we can find a basis consisting of eigenvectors, then T is diagonalizable.
Since we have a maximum set of linearly independent eigenvectors, S = {(1, 1), (-3, 1)}, we can form a matrix P with these eigenvectors as columns:
P = [(1, -3), (1, 1)]
To find the diagonal matrix D, we use the formula D = P^(-1)[T]P, where [T] is the matrix representation of T in the usual basis.
Calculating P^(-1):
P^(-1) = 1/4 [(1, 3), (-1, 1)]
Now, calculating D:
D = P^(-1)[T]P
= 1/4 [(1, 3), (-1, 1)][(3, 3), (1, 5)][(1, -3), (1, 1)]
= 1/4 [(1, 3), (-1, 1)][(6, 18), (8, 28)]
= 1/4 [(1, 3), (-1, 1)][(6, 18), (8, 28)]
= 1/4 [(30, 90), (10, 30)]
= [(7.5, 22.5), (2.5, 7.5)]
So, the matrix representation of T, [T], in the basis of eigenvectors is D = [(7.5, 22.5), (2.5, 7.5)].
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Find the volume of a right circular cone that has a height of 18.5 in and a base with a diameter of 17.5 in. Round your answer to the nearest tenth of a cubic inch.
Answer:
Step-by-step explanation:
volume of cone formula: V = 1/3 πr²h
r = 1/2 d
r = 1/2 (17.5)
r = 8.75 in
V = 1/3 (π8.75²)(18.5)
V = 1483.26 in²
Last week, Shane bought 11 books and 4 movies for a total of
$92.
Today, Shane bought 9 books and 9 movies for a total of $144.
Assuming neither item has changed in price, what is the cost
of a book in dollars?
Answer: 1 book= 8 dollars
Step-by-step explanation:
9 x8= 72 meaning that 72 + 72 = 144 so 1 book must equal 8 dollars
Find the distance between the points (–2,8) and (–2,3).
Answer:
I think it's 5
Step-by-step explanation:
I am not really sure but I tried I guess
Which of the following figures has a length, width, and height?
A. Square
B. Line segment
C. Point
D. Pyramid
Answer:
I believe
D. Pyramid
Is the answer I did it in 6th or 7th grade
Step-by-step explanation:
Square is flat so no height.
Line segment is a flat line so no height
point is a literal dot
pyramid is a 3d figure so it would have all of the attributes
We both helped right?
Answer:
Pyramid
Step-by-step explanation:
Square is flat so no height.
Line segment is a flat line so no height
point is a literal dot
pyramid is a 3d figure so it would ahve all of the attributes
The scatter plot shows the relationship between backpack weight and student weight. Which statement describes the data shown in the scatter plot?
A) A potential outlier at (12, 50).
B) A potential outlier at (50, 12).
C) A cluster between a student weight of 40 kg to 70 kg.
D) A cluster between a backpack weight of 4 kg to 12 k
Answer:
the answer is B on USA Prep
Step-by-step explanation:
"A potential outlier at (50, 12)" is the statement that best describes the data shown in the scatter plot.
What is the line of best fit?A straight line that minimizes the gap between it and certain data is called a line of best fit. In a scatter plot containing several data points, a relationship is expressed using the line of best fit. It is a result of regression analysis and a tool for forecasting indicators and price changes.
Given:
The scatter plot shows the relationship between backpack weight and student weight.
From the given choices:
An outlier is a value that nowhere near the range of the data set.
From the scatter plot:
A potential outlier at (50, 12).
Therefore, a potential outlier at (50, 12).
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Help plssssss I need it I’m failing life like uhhhhhh
Answer:
164
Step-by-step explanation:
15(5)
2(7)
15(5)
add em up
75 plus 14 plus 75
Please help meee! I will give brainleiest!
Answer:
What do you need help with?
What doth thee needeth help with?
您需要什么？
I'm stuck. plz help I dont know how
Answer:
1) regular price ⇒ $X
Sale price:75,24
Regular price: 100, X
2) The Ratio of the numbers in the first column equals the to ratio
of numbers in the second one
so.. [tex]\frac{75}{124}=\frac{100}{x} \\[/tex]
X=100 ×24/75
X=$32
Regular price-sale price=32-24=$8
hope it helps...
A random sample of size 25 is to be taken from a population that is normally distributed with mean 60 and standard deviation 10. The average of the observations in our sample is to be computed. The sampling distribution is
A. Normal with mean 60 and a standard deviation of 10.
B. Normal with mean 12 and a standard deviation of 2.
C. Normal with mean 60 and a standard deviation of 0.4.
D. Normal with mean 60 and a standard deviation of 2.
The correct option is D. Normal with mean 60 and a standard deviation of 2.
A sampling distribution is a probability distribution derived from taking numerous samples of a specific size from a population. The characteristics of the sampling distribution are determined by the sample size and how the samples are collected.
Standard deviation is the amount by which the observations in a dataset deviate from the mean. It is a measure of variability that reflects the degree to which data is spread around the mean.
The higher the standard deviation, the more spread out the data is.What is the formula for the standard deviation of a sampling distribution?σ_x = σ/√nWhere,σ_x is the standard deviation of the sampling distribution σ is the population standard deviationn is the sample size
To calculate the standard deviation of the sampling distribution, we must first identify the population standard deviation, which is 10 in this case, and the sample size, which is 25.σ_x = σ/√nσ_x = 10/√25σ_x = 2Therefore, the standard deviation of the sampling distribution is 2.
The mean of the sampling distribution is equal to the population mean, which is 60. Thus, the sampling distribution is normal with a mean of 60 and a standard deviation of 2.
Therefore, option D is correct.Normal distribution has a shape that is symmetrical and bell-shaped with a mean of 0 and a standard deviation of 1. The curve's tail will continue indefinitely in both directions.
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The correct answer is option D. Normal with mean 60 and a standard deviation of 2.
A random sample of size 25 is to be taken from a population that is normally distributed with a mean 60 and a standard deviation 10.
The average of the observations in our sample is to be computed.
The sampling distribution is Normal with a mean 60 and a standard deviation of 2.
What is the sampling distribution? When we take the average of a large number of samples drawn from a normally distributed population, the resulting distribution is referred to as a sampling distribution.
Because the population is normally distributed, the mean of the sampling distribution will be the same as the population mean, which is 60.
The standard deviation of the sampling distribution is determined by dividing the population standard deviation by the square root of the sample size, therefore the standard deviation of the sampling distribution is 2.
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ill mark brainliest, question is attached
Answer:
w=8
Step-by-step explanation:
[tex]72=7w+2w\\72=9w\\\frac{72}{9} =w\\w=8[/tex]
proof:
[tex]72=7(w)+2(w)\\72=7(8)+2(8)\\72=56+16\\72=72[/tex]
Answer:
Simplest-9w=72, w=8
Step-by-step explanation:
7w+2w=9w
72/9=8
w=8
HELPPPPPPPPPPPPPppppppppp number 4
Answer:
3 dots
Step-by-step explanation:
This should be correct due to there only being 3 100% on the table
What is the difference of the value of Lily's expression , 6x-3, when x=5 and the value of Pedro's expression when x=5 ? Show or explain how you got your answer.
Given Info : What is the difference of the value of Lily's expression , 6x-3, when x=5 and the value of Pedro's expression when x=5 .
To Find :- Show or explain how you got your answer.
Solution:-
The expression is 6x-3 , and we need to find its value at x = 5 , On putting x =5 we have
6*5-3 = 30-3 = 27.
This value will come same in case of Pedro, therefore our required answer is 5
Derek will deposit $6,460.00 per year for 21.00 years into an
account that earns 14.00%, The first deposit is made next year. How
much will be in the account 40.00 years from today? Answer format:
Cur
The total amount that will be in the account 40.00 years from today, considering the annual deposits of $6,460.00 for 21.00 years and an annual interest rate of 14.00%, will be approximately $6,120,433.84.
Derek plans to deposit $6,460.00 per year for 21.00 years into an account with an annual interest rate of 14.00%. The first deposit will be made next year.
To calculate the total amount in the account 40.00 years from today, we need to consider the annual deposits, the interest earned, and the compounding effect over the years.
The annual deposit is $6,460.00, and the duration of deposits is 21.00 years.
Therefore, the total amount of deposits made over the 21.00 years will be 21.00 × $6,460.00 = $135,660.00.
To calculate the future value of the deposits and the interest earned, we can use the compound interest formula:
Future Value = Principal × [tex](1 + interest\, rate)^{number\, of\, periods}[/tex]
In this case, the principal is $135,660.00, the interest rate is 14.00%, and the number of periods is 40.00 years.
Future Value = $135,660.00 × [tex](1 + 0.14)^{40}[/tex]
Future Value = $135,660.00 × [tex](1.14)^{40}[/tex]
Future Value = $135,660.00 × 45.094
Future Value = $6,120,433.84
Therefore, the total amount that will be in the account 40.00 years from today, considering the annual deposits of $6,460.00 for 21.00 years and an annual interest rate of 14.00%, will be approximately $6,120,433.84.
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A homologous series of centrifugal pumps has a specific speed of 1.1 and are driven by 2400-rpm motors. For a 400-mm size within this series, the manufacturer claims that the best efficiency of 85% occurs when the flow rate is 500 L/s and the head added by the pump is 895 m. What would be the best-efficiency operating point for a 300-mm size within this homologous series, and estimate the cor- responding efficiency
For centrifugal, the best-efficiency operating point for a 300-mm size within this homologous series, and estimate the corresponding efficiency can be calculated as follows:
Given data: Specific speed (Ns) = 1.1Speed of motor (N) = 2400 rpm Best efficiency of 400 mm size pump within this series is 85%The flow rate (Q) at best efficiency is 500 L/s The head added (H) by the pump at best efficiency is 895 m We are required to find the best efficiency and operating point of a 300-mm size within this homologous series.
As per affinity laws of pump, the performance of pumps that are geometrically similar but of different sizes can be compared by the equation:N1/Q1 = N2/Q2 (speed and flowrate relationship)H1/H2 = (D1/D2)² (head and diameter relationship)P1/P2 = (D1/D2)³ (power and diameter relationship)Where,N1 and N2 are speeds of the pumpsQ1 and Q2 are the flowrates of the pumpsH1 and H2 are the heads added by the pumpsD1 and D2 are the diameters of the pumpsP1 and P2 are the power input of the pumps
This information can be used to estimate the best efficiency operating point of the 300-mm pump. Let's assume that the efficiency of the 300-mm pump at the best efficiency operating point is η.We can use the pump affinity laws to estimate the efficiency of the 300-mm pump as follows:η1/η2 = (D1/D2)³ (efficiency and diameter relationship)η1 = 85% (best efficiency of 400-mm pump)η2 = η (efficiency of 300-mm pump)D1 = 400 mmD2 = 300 mm∴ η1/η2 = (D1/D2)³η2 = η1 / (D1/D2)³= 85% / (400/300)³= 69.7%
Therefore, the best efficiency of the 300-mm pump is 69.7%.Answer: The best-efficiency operating point for a 300-mm size within this homologous series is a flow rate of 500 L/s and a head of 677 m. The corresponding efficiency is 69.7%.
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QUICK! WHOEVER GIVES CORRECT ANSWER GETS BRAINLIEST
Answer:
15
Step-by-step explanation:
Answer:
15 cookies
Step-by-step explanation:
10 cookies is equivalent to 2 scoops of flour.
You need to find how many cookies they can make with just 1 scoop of flour.
So, to do that, you'd need to do 10/2, which is 5.
10 represents the number of cookies, and 2 represents the scoops of flour. (5 represents the number of cookies you can make with 1 scoop of flour.)
This will work with any certain amount of flour, just use the equation 5 times X, where X is the amount of flour.
In this certain problem, they gave us the scoops of flour.
Replace X with 3.
3 times 5 = 15.
15 cookies.
Find the slope plz help ASAP!!
A sample of 110 one-year-old spotted flounder had a mean length of 120.18 millimeters with a sample standard deviation of 18.08 millimeters, and a sample of 138 two-year-old spotted flounder had a mean length of 134.96 millimeters with a sample standard deviation of 27.41 millimeters. Construct a 95% confidence interval for the mean length difference between two-year-old flounder and one-year-old flounder. Let μ_1, denote the mean length of two-year-old flounder and round the answers to at least two decimal places.
A 95% confidence interval for the mean length difference, in millimeters, between two- year-old flounder and one-year-old flounder is ____ <μ_1 - μ_2 < _____
The 95% confidence interval for the mean length difference between two-year-old flounder and one-year-old flounder is (8.03 mm, 21.53 mm).
How to calculate the valueUsing a t-table or calculator, we can find the t-value corresponding to a 95% confidence level and 109 degrees of freedom. The t-value is approximately 1.984.
Substituting the values into the formula:
CI = (134.96 - 120.18) ± 1.984 * √[(18.08² / 110) + (27.41² / 138)]
CI = 14.78 ± 1.984 * √[(327.2064 / 110) + (752.6681 / 138)]
CI = 14.78 ± 1.984 * √[2.9746 + 5.4557]
CI = 14.78 ± 1.984 * √8.4303
CI = 14.78 ± 1.984 * 2.9015
CI = 14.78 ± 5.7519
CI = (8.0281, 21.5319)
The 95% confidence interval for the mean length difference between two-year-old flounder and one-year-old flounder is (8.03 mm, 21.53 mm).
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Lynn is trying to determine how far away Student B is from the balloon. He decides to use the
equation shown below. Is his equation correct? Why or why not?
5
cos 60º =
BIV x
Answer:
See Explanation
Step-by-step explanation:
The question is incomplete as the image that illustrates the scenario is not given.
However, I can deduce that the question is about a right-angled triangle.
So, I will give a general explanation on how to find each of the side of the triangle, given a side and an angle.
For triangle A (solve for b)
Using cosine formula.
[tex]\cos \theta = \frac{Adjacent}{Hypotenuse}[/tex]
[tex]\cos 60= \frac{5}{b}[/tex]
Make b the subject
[tex]b= \frac{5}{\cos 60}[/tex]
For triangle B (solve for b)
Using cosine formula.
[tex]\sin \theta = \frac{Opposite}{Hypotenuse}[/tex]
[tex]\sin 60= \frac{b}{5}[/tex]
Make b the subject
[tex]b = 5\sin 60[/tex]
For triangle C (solve for b)
Using cosine formula.
[tex]\tan \theta = \frac{Opposite}{Adjacent}[/tex]
[tex]\tan 60= \frac{b}{5}[/tex]
Make b the subject
[tex]b = 5\tan 60[/tex]
Answer:
Did you get the answer If so please give it to me.
Step-by-step explanation:
A formula of order 4 for approximating the first derivative of a function f gives: f'(0) -4.50557 for h = 1 f'(0) 2.09702 for h = 0.5 By using Richardson's extrapolation on the above values, a better
Using Richardson's extrapolation the improved approximation of the first derivative at x = 0 is -4.94543.
A formula of order 4 for approximating the first derivative of a function f gives two values: f'(0) = -4.50557 for h = 1 and f'(0) = 2.09702 for h = 0.5.
To obtain a better approximation using Richardson's extrapolation, we can use these two values and apply the following formula:
f'(0) = f'(0) + (f'(0) - f'(0)) / (h^p - 1)
where p is the order of the formula (in this case, p = 4).
Using the given values, we have:
f'(0) = 2.09702 + (2.09702 - (-4.50557)) / ((0.5/1)^4 - 1)
Simplifying the expression:
f'(0) = 2.09702 + 6.60259 / (0.0625 - 1)
f'(0) = 2.09702 + 6.60259 / (-0.9375)
f'(0) = 2.09702 - 7.04245
f'(0) ≈ -4.94543
Therefore, the improved approximation of the first derivative at x = 0 using Richardson's extrapolation is f'(0) ≈ -4.94543.
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If the diameter of a men’s basketball is 10 inches and a women’s is 9 inches, what is the approximate difference of their volumes? 133.9 in.3 137.6 in.3 141.9 in.3 145.6 in.3
Answer:
Its c
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
Complete the equation of this circle:
Please help will mark brainliest!!
Answer:
(x+2)^2 +(y-4)^2
Step-by-step explanation:
correct answer: ( x - ( -2 ) ) ² + ( y - 4 ) ² = 36
so put in -2 for the first blank, 4 for the second and 36 for the last blank!
btw it can be simplified to (x+2)² + (y-4)² = 6²
but thats not what theyre asking for ^^
Need asap please help
Answer:
(3)
Step-by-step explanation:
The function C(x) = -2x2 + 38x + 40 models the sales, in hundreds of
millions of dollars, of compact discs for years since 1990.
Question:
Rewrite the function to reveal when sales of compact discs and $0.
Answer:
The cost in 2010 is $0
Step-by-step explanation:
Given
[tex]C(x) = -2x^2 + 38x + 40[/tex]
Required
Find x when [tex]C(x) = 0[/tex]
This gives:
[tex]C(x) = -2x^2 + 38x + 40[/tex]
[tex]-2x^2 + 38x + 40=0[/tex]
Expand
[tex]-2x^2 + 40x -2x+ 40=0[/tex]
Factorize:
[tex]-2x(x - 20) -2(x- 20)=0[/tex]
[tex](-2x - 2)(x- 20)=0[/tex]
Solve for x
[tex]-2x-2=0\ or\ x - 20 = 0[/tex]
[tex]x = -1\ or\ x = 20[/tex]
x represents time. So, it cannot be negative.
[tex]x = 20[/tex]
20 years after 1990 is: 2010. Hence, the cost in 2010 is $0
Cynthia bought a shirt for $35 that was originally $55. What was the percent change in the price of the shirt? Round to the nearest hundredths place.
NO LINKS OR I WILL REPORT YOU
Answer:36.36%
Step-by-step explanation:
%change=100 X (final-inital value) divided by initial