sin(2x) is 4/5 cos(2x) is 3/5 and tan(2x) is -2/3.
Given that, sin(x) = −1/√5
We know that sin x = y/r, where y is the opposite side and r is the hypotenuse. Since x is in the third quadrant, y is negative and r is positive, so we can draw a triangle in the third quadrant like the one below:
[asy]
unitsize(2cm);
pair A = (-1,0);
pair B = (-0.6,-0.8);
pair C = (0,-0.8);
draw(A--B--C--A);
draw(rightanglemark(A,C,B,2.5));
draw(Circle((0,0),1));
label("$x$",(C+B)/2,E);
label("$r$",(C)/2,NW);
label("$y$",(A)/2,S);
[/asy]
Here, $y=-1$, $r=\sqrt{5}$ and $x$ is the angle opposite to the side $y$. Using the Pythagorean theorem, we can find that the adjacent side is $x = -\sqrt{5 - 1} = -\sqrt{4} = -2$. Therefore,
$$
\cos(x) = \frac{x}{r} = \frac{-2}{\sqrt{5}} = -\frac{2\sqrt{5}}{5}
$$
Using the double angle formulas for sine and cosine,
$$
\begin{aligned}
\sin(2x) &= 2\sin(x)\cos(x)\\
&= 2\cdot \left(-\frac{1}{\sqrt{5}}\right) \cdot \left(-\frac{2\sqrt{5}}{5}\right)\\
&= \frac{4}{5}\\
\\
\cos(2x) &= 1 - 2\sin^2(x)\\
&= 1 - 2\cdot \left(-\frac{1}{\sqrt{5}}\right)^2\\
&= \frac{3}{5}\\
\\
\tan(2x) &= \frac{2\tan(x)}{1-\tan^2(x)}\\
&= \frac{2 \cdot \left(-\frac{1}{2}\right)}{1-\left(-\frac{1}{2}\right)^2}\\
&= \frac{-2}{3}
\end{aligned}
$$Therefore, sin(2x) is 4/5, cos(2x) is 3/5 and tan(2x) is -2/3.
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Vector v is defined by the components 3, 5;. Vector w is defined by the components negative 1, 4;. Determine the angle θ, in degrees, formed between vector v and vector w, where 0° < θ ≤ 180°.
Answer:250
Step-by-step explanation:
There are 5 students in Mrs. Templeton's art class. Each student has 2 paintbrushes on his desk. Which of the following shows how to find the total number of paintbrushes in the classroom?
1. 5 divided by 2
2. 5 times 5
3. 2 times 2
4. 5 times 2
Answer:
D
Step-by-step explanation:
To find the total number of paintbrushes in the classroom, we need to multiply the number of paintbrushes on each student's desk by the number of students.
Since there are 5 students and each student has 2 paintbrushes, we can use the multiplication operation to find the total number of paintbrushes:
5 students × 2 paintbrushes per student = 10 paintbrushes
Therefore, the correct option is 4. 5 times 2.
please help :((I need help
Answer:
See attached graph for the two functions
y = cos(x)
y = 0.5
Solution set for cos(x) i.e. the values of x for which cos(x) = 0.5 in the interval 0 < x < 2π are
{π/3, 5π/3)
or
{1.05, 5.24} in decimal
Step-by-step explanation:
I moved the original horizontal up to y = 0.5
The solutions to the two equations are where the two functions intersect
There are two intersection in the interval 0 ≤ x ≤ 2π and are at the points labeled A and B
The two points can be obtained by setting
cos(x) = 0.5 and solving for x
cos(x) = 0.5
=> x = cos⁻¹ (0.5)
= 60° and 300° in the range 0 ≤ x ≤ 2π where 2π = 360°
In terms of π,
Since π radians = 180°, 1° = π/180 radians
60° = π/180 x 60 = π/3 radians
300° = π/180 x 300 = 5π/3 radians
Therefore the solutions to cos(x) = 0.5 are
x = π/3 and x = 5π/3
The solution set is written as {π/3, 5π/3}
In decimal
π/3 = 1.04719 ≈ 1.05
5π/3 = 5.23598 ≈ 5.24
Solution set in decimal: {1.05, 5.24}
Explain the importance of the unit circle in trigonometry.
Answer: The unit circle is an essential tool in trigonometry because it helps in understanding and visualizing the relationships between angles and the values of the sine, cosine, and tangent functions.
The unit circle is a circle with a radius of one unit and centered at the origin of a coordinate plane. It is divided into 360 degrees or 2π radians. By placing this circle on the coordinate plane, we can easily determine the sine and cosine values of angles in standard position.
For any given angle θ, the sine value is the y-coordinate of the point where the terminal side of the angle intersects the unit circle, and the cosine value is the x-coordinate of that same point. The tangent function, which is the ratio of sine to cosine, can also be determined using the unit circle.
The unit circle also helps in understanding the periodicity of the sine and cosine functions. Since the circumference of the unit circle is 2π, the sine and cosine functions repeat themselves after every 2π radians or 360 degrees. This periodicity allows for the use of trigonometric identities and formulas to simplify and solve complex trigonometric equations.
In summary, the unit circle is an essential tool in trigonometry as it provides a visual representation of angles and their corresponding sine, cosine, and tangent values, and allows for the use of trigonometric identities and formulas to solve complex problems.
+ -/7 points SPreCalc7 2.4.039 + Ask Your Teacher My Notes 13. An object is dropped from a high cliff, and the distance (in feet) it has fallen after t seconds is given by the function d(t) = 16t2. Complete the table to find the average speed during the given time intervals. d(b) - d(a) t = a Average speed t = b 9 9.5 9.1 9 9.01 9.001 9.0001 9 Use the table to determine what value the average speed approaches as the time intervals get smaller and smaller. Is it reasonable to say that this value is the speed of the object at the instant t = 9? Explain. From the table it appears that the average speed approaches ft/s (rounded to the nearest whole number) as the time intervals get smaller and smaller. It reasonable to say that this number is the --Select-- speed of the object at the instant t = 9. Submit Answer
The average speed during a given time interval can be found by calculating the change in distance over the change in time, or (d(b) - d(a))/(b-a). In this case, we can use the given function d(t) = 16t^2 to find the distance at each given time. It is reasonable to say that this value is the speed of the object at the instant t = 9 because as the time interval approaches zero, the average speed approaches the instantaneous speed at that moment.
For the first time interval, t = a = 9 and t = b = 9.5:
d(a) = 16(9)^2 = 1296
d(b) = 16(9.5)^2 = 1444
Average speed = (1444 - 1296)/(9.5 - 9) = 148/0.5 = 296 ft/s
For the second time interval, t = a = 9 and t = b = 9.1:
d(a) = 16(9)^2 = 1296
d(b) = 16(9.1)^2 = 1324.96
Average speed = (1324.96 - 1296)/(9.1 - 9) = 28.96/0.1 = 289.6 ft/s
For the third time interval, t = a = 9 and t = b = 9.01:
d(a) = 16(9)^2 = 1296
d(b) = 16(9.01)^2 = 1300.9616
Average speed = (1300.9616 - 1296)/(9.01 - 9) = 4.9616/0.01 = 496.16 ft/s
For the fourth time interval, t = a = 9 and t = b = 9.001:
d(a) = 16(9)^2 = 1296
d(b) = 16(9.001)^2 = 1296.288016
Average speed = (1296.288016 - 1296)/(9.001 - 9) = 0.288016/0.001 = 288.016 ft/s
For the fifth time interval, t = a = 9 and t = b = 9.0001:
d(a) = 16(9)^2 = 1296
d(b) = 16(9.0001)^2 = 1296.0288016
Average speed = (1296.0288016 - 1296)/(9.0001 - 9) = 0.0288016/0.0001 = 288.016 ft/s
As the time intervals get smaller and smaller, the average speed approaches 288 ft/s.
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About 74% of all female heart transplant patients will survive for at least 3 years. Seventy female heart transplant patients are randomly selected. What is the probability that the sample proportion surviving for at least 3 years will be less than 70% ? Assume the sampling distribution of sample proportions is a normal distribution. The mean of the sample proportion is equal to the population proportion and the standard deviation is equal to {n/pq}.
The probability that the sample proportion surviving for at least 3 years will be less than 70% is approximately 0.2734 or 27.34%.
What is a probability?Probability is a branch of statistics that deals with the study of random events and their likelihood of occurrence.
First, calculate the standard deviation of the sampling distribution of sample proportions using the formula.
σ = [tex]\sqrt{[(p*q)/n]}[/tex], where p is the population proportion, q = (1 - p), and n is the sample size.
In this case, p = 0.74, q = 0.26, and n = 70
Therefore, σ = [tex]\sqrt{[(0.74*0.26)/70]}[/tex] = 0.066
Next, we need to standardize the sample proportion using the formula,
z = (X - p) / σ, where X is the sample mean, p is the population proportion, and σ is the standard deviation of the sampling distribution.
In this case, X = 0.70, p = 0.74, and σ = 0.066
Thus, z = (0.70 - 0.74) / 0.066 = -0.606
Using a standard normal distribution table, we find that the cumulative probability for a z-score of -0.606 is 0.2734.
Therefore, the probability that the sample proportion surviving for at least 3 years will be less than 70% is approximately 0.2734 or 27.34%.
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Khaled calculates the mean of five different prime numbers. His answer is an integer, what is the smallest possible integer he could have obtained.
Answer:
6
Step-by-step explanation:
[tex] \frac{2 + 3 + 5 + 7 + 13}{5} = \frac{30}{5} = 6[/tex]
The line plot shows the distances ten students walk to school. What is the difference between the longest distance a student walks and the shortest distance a student walks?
By deducting the value of the shortest distance from the value of the longest distance on the line plot, it is possible to determine the difference between the longest and shortest distances a student has walked to get to school.
We must look at the provided line plot to ascertain the difference between the longest and shortest distances a student walks to get to school. Ten pupils were tracked across various distances using a line plot. The location of each student is indicated by a "X" on the map.
Just looking for the X with the highest and lowest frequency will yield the longest and shortest lengths. According to the line plot, the distances at which Xs occur most frequently are 2 miles away and 0.5 miles away, respectively. As a result, there is a 1.5 mile discrepancy between the student's maximum walking distance (2 miles) and their shortest walking distance (0.5 miles).
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What can baby lizards do that baby snakes can’t
Baby lizards can run, climb and in some cases even change color to match their surroundings, while baby snakes are generally limited to crawling and slithering.
Baby lizards have developed legs, claws and a tail to help them navigate their environment, while baby snakes have lost their legs during evolution and have developed a long, slender body to help them move around.
Additionally, some baby lizards are born with a protective membrane around their eggs that allows them to move around freely, while baby snakes are usually born inside an egg that they must break out of before hatching. Overall, baby lizards have more mobility and flexibility than baby snakes, which gives them an advantage in many environments.
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use the distance formula and the slope of segments to identify the type of quadrilateral
T(-3,-3), U(4, 4), V(0, 6), W(-5, 1)
The given quadrilateral is a parallelοgram and a kite.
What are quadrilaterals?Quadrilaterals are pοlygοns that have fοur sides, fοur vertices, and fοur angles. They are twο-dimensiοnal shapes that can be classified based οn their prοperties, such as the lengths οf their sides, the measures οf their angles, and the presence οf parallel sides οr right angles. Sοme cοmmοn types οf quadrilaterals include:
Nοw,
Tο identify the type οf quadrilateral fοrmed by the vertices T(-3,-3), U(4, 4), V(0, 6), and W(-5, 1), we need tο first find the lengths οf the sides and the slοpes οf the segments cοnnecting the vertices.
Using the distance fοrmula, we get:
[tex]TU = \sqrt{[(4 - (-3))^2 + (4 - (-3))^2]} = \sqrt {[7^2 + 7^2]} = \sqrt{(98)[/tex]
[tex]UV = \sqrt{[(0 - 4)^2+ (6 - 4)^2]} = \sqrt{[(-4)^2 + 2^2]} = \sqrt{(20)[/tex]
[tex]VW = \sqrt{[(-5 - 0)^2 + (1 - 6)^2]}= \sqrt{[(-5)^2+ (-5)^2]} = \sqrt{(50)[/tex]
[tex]WT = \sqrt{[(-5 - (-3))^2+ (1 - (-3))^2]} = \sqrt{[(-2)^2 + 4^2]} = \sqrt{(20)[/tex]
Next, we can find the slοpes οf the segments:
TU: m = (4 - (-3))/(4 - (-3)) = 1
UV: m = (6 - 4)/(0 - 4) = -1/2
VW: m = (1 - 6)/(-5 - 0) = 1
WT: m = (1 - (-3))/(-5 - (-3)) = -1/2
Nοw we can use these measurements tο identify the type οf quadrilateral:
Oppοsite sides are parallel: VW and TU have slοpes οf 1 and slοpes οf -1 respectively. Therefοre, the quadrilateral is a parallelοgram.
Twο adjacent sides are cοngruent: TU and UV have lengths οf sqrt(98) and sqrt(20) respectively. Therefοre, the quadrilateral is nοt a rhοmbus.
Diagοnals bisect each οther: The diagοnals TV and UW intersect at (2, 1.5), which is the midpοint οf bοth diagοnals. Therefοre, the quadrilateral is a parallelοgram.
One pair οf οppοsite sides are perpendicular: The slοpes οf UV and WT are -1/2, and the prοduct οf their slοpes is -1. Therefοre, the quadrilateral is a kite.
All sides are cοngruent: The lengths οf the sides are nοt all equal. Therefοre, the quadrilateral is nοt a square.
Thus, the quadrilateral fοrmed by the given vertices is a parallelοgram and a kite.
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Chapter 5 Lesson 1 Adding and Subtracting Polynomials
1. Quadratic monomials.
2. Biquadratic five-term polynomials.
3. Quadratic trinomials.
4. x³ + 3x² - 5x - 4
5. -[tex]x^{5}[/tex] + 4[tex]x^{4}[/tex] +2x³ + 2x - 7
6. - x² + 5x + 9
7. y² - 3y - 9
8. 5(x³ + x)
9. 2x² + 2x -5
What are polynomials?Algebraic expressions called polynomials only have non-negative integer powers for their variables. A polynomial is, for instance, 5x² - x + 1. The polynomial 3x³ + 4x + 5/x + 6[tex]x^{3/2}[/tex] is not a polynomial since one of the powers of "x" is a fraction and the other is negative.
Expressions with one or more terms that have a non-zero coefficient are called polynomials. Variables, exponents, and constants make up polynomial terms. The "leading term" refers to the first term of the polynomial in standard form.
Here in the given question,
We can see the highest degree of the variable and we can determine the name of each polynomial.
Likewise, we can just arrange the expressions as per the highest value of the power of the variable.
And simplify the expression by adding or subtracting the like terms.
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Trey is driving to Philadelphia. Suppose that the distance to his destination (in miles) is a linear function of his total driving time (in minutes). Trey has 69 miles
to his destination after 15 minutes of driving, and he has 47.4 miles to his destination after 39 minutes of driving. How many miles will he have to his
destination after 51 minutes of driving?
1. What is the finance charge on June 11 (monthly periodic rate: 1.3)
2. What is the new card balance on June 12th
1. The finance charge on June 11 is $1.98.
2. The new card balance on June 12th is $341.30
What is the finance charge on June 11?To calculate the finance charge and new card balance, we first need to calculate the average daily balance for the billing cycle.
May 13 Charge toys: $129.79 (balance: $129.79)
May 15 Payment $50 (balance: $79.79)
June 1 Charge clothing $135.95 (balance: $215.74)
June 8 Charge Housewares $37.63 (balance: $253.37)
Billing cycle: May 13 to June 11 (30 days)
Average daily balance:
= (129.79 x 18) + (79.79 x 16) + (215.74 x 10) + (253.37 x 6) / 30
= $152.49
The Finance charge is computed as:
= Average daily balance * Monthly periodic rate.
= 152.49 x (1.3/100)
= $1.98.
What is the new card balance on June 12th?To calculate the new card balance on June 12th, we need to add the finance charge and any new charges to the previous balance and subtract any payments made.
Previous balance (as of June 1st) = $215.74
New charges (since June 1st) = $135.95 + $37.63 = $173.58
Payments made (since May 15th) = $50
The New card balance on June 12th will be:
= $215.74 + $173.58 + $1.98 - $50
= $341.30
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MRS. JAMISON'S CLASS
MR. ZIMMERMAN'S CLASS
.
.
.
o +
:
2 3
5 6
NUMBER OF TVS PER HOUSEHOLD
0 1 2 3
5 6
NUMBER OF TVs PER HOUSEHOLD
7
The mode number of TVs per household for both Mrs. Jamison's class and and Mr. Zimmerman's class is 3.
O True
False
The given statement "The mode number of TVs per household for both Mrs. Jamison's class and and Mr. Zimmerman's class is 3." is true. The mode of TVs per household is 3 in both Mrs. Jamison's class and and Mr. Zimmerman's class.
Mode is a statistical measure that represents the value that appears most frequently in a dataset. It is one of the measures of central tendency, along with mean and median.
In Mrs. Jamison's class, the mode number of TVs per household is 3 because it appears twice, while all other numbers appear only once. Similarly, in Mr. Zimmerman's class, the mode number of TVs per household is 3 because it appears twice, while all other numbers appear only once.
Therefore, the statement "The mode number of TVs per household for both Mrs. Jamison's class and Mr. Zimmerman's class is 3" is true.
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Write an explicit function to model the value of the nth term in the sequence f(1)=4
The explicit functions are:
Arithmetic sequence with common difference d=3: f(n) = 3n +1
Geometric sequence with common ratio r=2: f(n) = 2^n + 2
Quadratic sequence with leading coefficient a=1, constant term c=2, and linear term b=1: f(n) = n^2 + n + 2
There are infinitely many possible sequences that satisfy the condition f(1)=4, so the function to model the value of the nth term in the sequence will depend on the specific pattern or rule that the sequence follows.
Here are some examples of possible sequences and the corresponding explicit functions:
Arithmetic sequence with common difference d=3: f(n) = 4 + 3(n-1) = 3n + 1
Geometric sequence with common ratio r=2: f(n) = 4 x 2^(n-1) = 2^n+2
Quadratic sequence with leading coefficient a=1, constant term c=2, and linear term b=1: f(n) = n^2 + n + 2
Fibonacci sequence with initial values f(1)=f(2)=1: f(n) = ((1+sqrt(5))/2)^n/sqrt(5) - ((1-sqrt(5))/2)^n/sqrt(5)
Note that these are just examples, and there are many other possible functions that could model a sequence with f(1)=4
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Please help mee
For the following question, find the value of the variable(s). If your answer is not an integer, leave it in simples radical form
hope it helps you
option d
The effectiveness of a new antibacterial cream called Formulation NS is being tested. From previous research, it is known that without medication, the mean healing time (defined as the time for the scab to fall off) is 7. 6 days. A random sample of 250 college students apply Formulation NS to their wounds. The mean healing time for these students is 7. 5 days with a standard deviation of 0. 9 days. Test at the 5% significance level if applying Formulation NS speeds (takes less time) healing than foregoing treatment. Use the critical value approach
The t-statistic is less than the critical value, we fail to reject the null hypothesis
The hypothesis testing to be conducted here is a two-tailed test for the population mean, using the formula:
H0: μ = 7.6 days
Ha: μ ≠ 7.6 days
The critical value is ± 1.960, with a confidence level of 95%.
The sample mean is 7.5 days and the sample standard deviation is 0.9 days. Using the formula, we can calculate the t-statistic:
t = (7.5 - 7.6) / (0.9 / √250) = -1.105
Since the t-statistic is less than the critical value, we fail to reject the null hypothesis, suggesting that Formulation NS does not significantly speed up the healing process compared to the foregoing treatment.
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Please help !!!! I need to the answers asap
The possible rational roots of the polynomial are ±1/2, ±1, ±3/2, ±3, ±9/2, ±9 while the actual roots are 1, -3, 3/2
What are the possible and real rational rootsTo find the possible rational roots of the polynomial 2x^3 + x^2 - 12x + 9 = 0, we can use the rational root theorem. According to the theorem, if a polynomial with integer coefficients has a rational root p/q (where p and q are integers with no common factors other than 1), then p must be a factor of the constant term (in this case, 9) and q must be a factor of the leading coefficient (in this case, 2).
The factors of 9 are ±1, ±3, and ±9, and the factors of 2 are ±1 and ±2. Therefore, the possible rational roots of the polynomial are:
±1/2, ±1, ±3/2, ±3, ±9/2, ±9
We can now use synthetic division or long division to check which of these possible roots are actual roots of the polynomial. After checking, we find that the real rational root of the polynomial are x = 1, -3, 3/2
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Which of the following shapes has 2 circular bases and a curved surface?
Right circular cone
Right circular cylinder
Right pyramid
Sphere
Answer: B. A right circular Cylinder
Step-by-step explanation:
A sample has the following data:
[32.564, 7.57, 21.815, −13.971, −15.224]
We know that the sample is from a normally distributed random variable, but we dont know the expected value or the variance
a)Calculate the sample variance
b)Calculate a two-sided confidence interval for the variance with a confidence level of 0.98
a) Sample Variance = 521.646
b)Two-sided confidence interval for the variance with a confidence level of 0.98 is (5.545, 10029.794).
a) To calculate the sample variance, you will first need to calculate the sample mean. The sample mean is calculated by summing all the observations in the sample and dividing by the number of observations. For this sample, the mean is:
Mean = (32.564 + 7.57 + 21.815 − 13.971 − 15.224) / 5 = 5.168
Next, you will need to calculate the sum of squared deviations from the mean. This is done by subtracting the mean from each observation and squaring the result, and then summing all of the results:
Sum of Squared Deviations = (32.564 - 5.168)^2 + (7.57 - 5.168)^2 + (21.815 - 5.168)^2 + (-13.971 - 5.168)^2 + (-15.224 - 5.168)^2 =
= 1564.939
Finally, you can calculate the sample variance by dividing the sum of squared deviations by the number of observations minus one:
Sample Variance = 1564.939 / (5 - 1) = 521.646
b) To calculate a two-sided confidence interval for the variance with a confidence level of 0.98, you will need to find the critical value from the Chi-squared distribution with a degrees of freedom equal to the number of observations in the sample minus one. For this sample, the degrees of freedom is 4.
The critical value for this degrees of freedom at the given confidence level is 8.37.
The lower bound of the confidence interval is:
Lower bound = (521.646 / 8.37) * (1 - 0.98) = 5.545
The upper bound of the confidence interval is:
Upper bound = (521.646 / 8.37) * (1 + 0.98) = 10029.794
Therefore, the two-sided confidence interval for the variance with a confidence level of 0.98 is (5.545, 10029.794).
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Which property of equality could be used to solve -3x=348
By solving the equation -3x = 348, we find that the value of x is -116.
The property of equality that could be used to solve -3x = 348 is the multiplication property of equality, which states that if we multiply both sides of an equation by the same non-zero number, the equation remains equivalent. In this case, we can divide both sides of the equation by -3 to isolate x and solve for it.
Using the multiplication property of equality, we can multiply both sides by -1/3:
(-1/3) * (-3x) = (-1/3) * 348
Simplifying:
x = -116
Therefore, the solution to the equation -3x = 348 is x = -116.
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-7(2a - 1) - 11 as simplify the expression completely
Answer:-14a-4
Step-by-step explanation:
Answer: Expanding the expression, we get:
-7(2a - 1) - 11 = -14a + 7 - 11
Combining like terms, we get:
-14a - 4
Therefore, the simplified expression is -14a - 4.
Enjoy!
someone help me plsss
The Answer:
The answer to the equation that Clare gets is:
X1= -3/2 + 7/2i , X2= -3/2 - 7/2i.
The Explanation:
4x^2+12x+58=0
2x^2+6x+29=0
a=2, b=6, c=29
Maximize p = 6x + 9y + 3. 3z + 12w subject to
(a) 1. 2x + y + z + w ≤ 121. 5
(b) 2. 2x + y − z − w ≥ 30
(c) 1. 2x + y + z + 1. 2w ≥ 31. 5
(d) x ≥ 0, y ≥ 0, z ≥ 0, w ≥ 0.
Round all answers to two decimal places
The maximum value of p is 107.09 and it is obtained when x = 1.44, y = 31.02, z = 0, and w = 0.
To maximize the objective function p = 6x + 9y + 3.3z + 12w
We can use the simplex method.
First, we need to convert the inequalities into equalities by introducing slack variables:
(a) 1.2x + y + z + w + s1 = 121.5
(b) 2x + y − z − w + s2 = 30
(c) 2x + y + z + 1.2w + s3 = 31.5
We can then write the augmented matrix for the problem:
x y z w s1 s2 s3 b
1.2 1 1 1 1 0 0 121.5
2 1 -1 -1 0 1 0 30
2 1 1 1 0 0 1 31.5
-6 -9 -3.3 -12 0 0 0 0
We choose the most negative coefficient in the bottom row, which is -12. We then select the pivot element in the column corresponding to this coefficient, which is 121.5 in the first row. We perform row operations to make this pivot element equal to 1 and all other elements in its column equal to 0:
x y z w s1 s2 s3 b
1 0.83 0.17 0.33 0.67 -0.50 -0.17 100.67
0 0.17 -1.33 -1.33 -0.83 0.50 -0.17 12.33
0 0.17 0.33 0.33 -0.67 -0.50 0.83 10.17
0 -6.50 -12.90 -12.00 4.00 4.50 1.00 408.00
Next, we choose the most negative coefficient in the bottom row, which is -12.9. We select the pivot element in the column corresponding to this coefficient, which is 0.33 in the third row. We perform row operations to make this pivot element equal to 1 and all other elements in its column equal to 0:
x y z w s1 s2 s3 b
1 0.00 0.85 0.40 1.44 -0.54 -0.08 107.09
0 0.00 -1.22 -1.67 -1.00 0.38 0.08 -12.93
0 1.00 2.45 2.33 -2.00 1.50 0.33 31.02
0 0.00 -2.19 -5.60 10.00 10.50 1.83 630.00
The objective function value at this point is p = 107.09.
The solution is x = 1.44, y = 31.02, z = 0, w = 0, and the maximum value of p is 107.09.
Therefore, the maximum value of p is 107.09, when x = 1.44, y = 31.02, z = 0, and w = 0.
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Determine the circumference of a circle with a radius of 8 meters.
50.2 meters
100.5 meters
201.0 meters
25.1 meters
Answer:
50.2 is the answer as the answer came in point
i need help with this i did it so could you tell me if it's correct if it's not can you help me out
The answer is: Logan's rope is longer than Sam's rope.
What is fraction?A number that represents a part of a whole or a ratio between two quantities, written as a numerator over a denominator. It consists of a numerator (top) and a denominator (bottom) separated by a fraction bar. For example, 1/2 represents one-half of a whole or the ratio of one to two.
Part A:
Brittney's rope is shorter than Sam's rope because it is 4/5 as long as Sam's rope.
Logan's rope is longer than Sam's rope because it is 1 1/4 times as long as Sam's rope.
Holly's rope is equal to Sam's rope because it is 8/8 (which simplifies to 1) as long as Sam's rope.
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A shopkeeper bought 50 pangas and 30 jembes from a wholesaler A for sh 4260. Had he bought half as many jembes and 5pangas less,he would have sh 1290 less. Had the shopkeeper bought from wholesaler B,he would have paid 25% more for a pangas and 15 %less for a jembe. How much would he have saved if he had bought the 50 pangas and 30 jembes from wholesaler B
The shopkeeper would have saved 4756.25 - 4260 = 496.25 shillings.
What is the linear equation?
A linear equation is an algebraic equation of the form y=mx+b. where m is the slope and b is the y-intercept. We have a graph.
Let the cost of one panga be x and one jembe be y.
From the given information, we can form the following equations:
50x + 30y = 4260 --- Equation 1
25x/2 + (30/2 - 5)y = 2970 --- Equation 2
50(1.25)x + 30(0.85)y = total cost from wholesaler B --- Equation 3
Simplifying equation 2:
25x/2 + 10y - 5y = 2970
25x/2 + 5y = 2970
25x + 10y = 5940
Simplifying equation 3:
62.5x + 25.5y = total cost from wholesaler B
To solve for x and y, we can use any method of our choice. For simplicity, we will use elimination:
Multiplying equation 1 by 5:
250x + 150y = 21300 --- Equation 4
Multiplying equation 2 by 2:
25x + 20y = 5940 --- Equation 5
Subtracting equation 5 from equation 4:
225x + 130y = 15360
Substituting the value of y from equation 5:
225x + 130(297 - 2.5x) = 15360
225x + 38610 - 325x = 15360
-100x = -23250
x = 232.5
Substituting the value of x in equation 1:
50(232.5) + 30y = 4260
y = 85
Therefore, the cost of one panga is 232.5 shillings and the cost of one jembe is 85 shillings.
To find out how much the shopkeeper would have saved if he had bought from wholesaler B, we need to calculate the total cost from wholesaler B:
50(1.25)(232.5) + 30(0.85)(85) = 4756.25
The total cost from wholesaler A was 4260 shillings.
Therefore, the shopkeeper would have saved 4756.25 - 4260 = 496.25 shillings.
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solve the equation negative 2y plus 6 equals negative 12
Answer:
y = -9
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
since 2y is adding to positive 6 we take 6 to the right side where there its like term 12. we subtract 6 from 12 which is giving us 6. we are remaining with 2y=6 we divide both sides by 2 giving us y=3
please help me in this
Answer: At a greengrocer, two bananas and one apple cost $1.16 .
Than the equation becomes
2x + y = 1.16
one banana and one apple cost 0.71.
Than the equation becomes
x + y = 0.71
Subtracting x + y = 0.71 from 2x + y = 1.16
2x - x + y - y = 1.16 - 0.71
x = 0.45
Put in the equation x + y = 0.71
0.45 + y = 0.71
y = 0.71 - 0.45
y = 0.26
The cost of the one apple is 0.26
Step-by-step explanation:
The ratio of the cost of one metre of polyester fabric to the cost of one metre
of cotton fabric is 2: 7
Complete the table
The cost of one metre of cotton fabric is £ 7. The cost of one metre polyester fabric is £ 2.
The ratio of the cost of one metre of polyester fabric to the cost of one metre of cotton fabric is 2: 7.
1 m polyester / 1 m cotton = 2 / 7
1 m cotton = 7/2 × 1 m polyester
for 2 m of polyester fabric, the cost is £ 4
for 1 m of polyester fabric, the cost is £ 4/2 = £ 2
for 1 m of cotton fabric = 7/2 × 1 m polyester fabric = 7/2 × £2 = £ 7
for 1 m of cotton fabric, the cost is £ 7
For 2m, polyester fabric 2 × £2 = £ 4
cotton fabric 2 × £7 = £ 14
For 6m, polyester fabric 6 × £2 = £ 12
cotton fabric 6 × £7 = £ 42
For 8m, polyester fabric 8 × £2 = £ 16
cotton fabric 8 × £7 = £ 56
For 9m, polyester fabric 9 × £2 = £ 18
cotton fabric 9 × £7 = £ 63
The complete table
2m 6m 8m 9m
polyester fabric £ 4 £ 12 £ 16 £ 18
cotton fabric £ 14 £ 42 £ 56 £ 63
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