The system of equations has two solutions: (0,2) and (-4/5, -6/5).
Define Substitution methodThe substitution method is a way to solve a system of two linear equations with two variables. The method involves solving one of the equations for one of the variables, and then substituting that expression into the other equation in place of the same variable. This process reduces the system of two equations and two variables to a single equation and a single variable, which can then be solved.
We have the system of equations:
4x² + y² = 4 ........(1)
y = x + 2 ........(2)
We can solve this system of equations by substitution.
Substitute (2) into (1) to eliminate y:
4x² + (x + 2)² = 4
Simplify and solve for x:
4x² + x² + 4x + 4 = 4
5x²+ 4x = 0
x(5x + 4) = 0
x = 0 or x = -4/5
If x = 0, then from equation (2), y = 2. So one solution is (x,y) = (0,2).
If x = -4/5, then from equation (2), y = -6/5. So the other solution is (x,y) = (-4/5, -6/5).
Therefore, the system of equations has two solutions: (0,2) and (-4/5, -6/5).
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Tony, Sayo and Adah each played a game. Tony's score was four times Sayo's score. Adah's score was half of Tony's score. Write down the ratio of Tony's score to Sayo's score to Adah's score. Give your answer in its simplest form.
According to the solution we have come to find that, the ratio of Tony's score to Sayo's score to Adah's score is 4 : 1 : 2.
What is the simplest form?The smallest equivalent fraction of the integer is the most basic form.
Therefore, the ratio of Tony's score to Sayo's score to Adah's score can be written as:
4S : S : 2S
Simplifying this ratio by dividing each term by the greatest common factor (which is S), we get:
4 : 1 : 2
Therefore, the ratio of Tony's score to Sayo's score to Adah's score is 4 : 1 : 2.
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What is the effect of the rule of 78s when a borrower repays an add-on method loan early? please help
The effect of the Rule of 78s when a borrower repays an add-on method loan early may result in higher interest charges and potential prepayment penalties due to the uneven allocation of interest throughout the loan term.
The Rule of 78s is a method used by some lenders to allocate interest charges in add-on method loans, particularly for consumer loans. When a borrower repays an add-on method loan early, the Rule of 78s may affect how the prepayment is handled and the amount of interest charged.
Under the add-on method, the interest is calculated upfront based on the original loan amount and term. With the Rule of 78s, the interest is allocated to the loan payments in a manner that assigns more interest to the earlier payments in the loan term. This means that during the initial period of the loan, the borrower is primarily paying off interest rather than the principal.
When a borrower repays an add-on method loan early, the Rule of 78s may result in a higher amount of interest being charged compared to a simple interest loan. As the early payments have been disproportionately allocated more interest, the borrower may have paid off less of the principal than they would have under a simple interest method. Consequently, the borrower may face a higher prepayment penalty as they have not paid as much towards the principal balance as anticipated.
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Help me please, since there are two answers and I can’t get a good grade without both
The value of x for the equation I s derived to be equal to -0.8354 using logarithm.
How to evaluate for x using logarithmTaking the logarithm of both sides of the equation to base 10, we get:
log(4^(-x + 4)) = log(17^(-5x))
Using the power rule of logarithms, we can simplify both sides of the equation as;
(-x + 4) log(4) = (-5x) log(17)
Distributing the lig(4) and log(17), we get:
-xlog(4) + 4log(4) = -5xlog(17) {all in base 10}
5x log(17) - xlog(4) = 4 log(4) {collect like terms}
x[5log(17) - log(4)] = 4log(4)
x = 4log(4)/[5log(17) - log(4)] {divide through by the coefficient of x}
x ≈ -0.8354
Therefore, the value of x for the equation I s derived to be equal to -0.8354 using logarithm.
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Jose used the equation h - 130 = 75 to find the height in feet h of a hot air balloon before it began to come down. What was the height of the hot air balloon before it began to come down?
h - 130 = 75 demonstrates that h = 205 is a legitimate solution to the equation of height of hot air balloon.
How is height determined via linear equation?
We must discover the solution to the equation h - 130 = 75 for h, where h is the height of the balloon in feet, in order to determine its height before it started to descend.
We can increase both sides of the equation by 130 to isolate h:
h - 130 + 130 = 75 + 130
Simplifying:
h = 205
As a result, the hot air balloon reached a height of 205 feet before starting to descend. By substituting h = 205 into the original equation and confirming that it is satisfied, we may confirm this:
h - 130 = 75
205 - 130 = 75\s75 = 75
This demonstrates that h = 205 is a legitimate solution to the equation and, consequently, the hot air balloon's actual height.
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I need step by step detailed solution to the given question.
we can shown that the areas of △PMS and △SOR are equal, and the areas of △MQT and △NRT are equal,
we can then conclude that △PMS+△MQT = △SOR + △NRT.
How do we calculate?We will label the points in the figure as follows:
PQ = RS (given that PQRS is a parallelogram)
MN = OS (given that MNOS is a parallelogram)
T is the point of intersection of MQ and PR
R is the point of intersection of PS and NT
considering △PMS and △SOR. We can see that they share a base, PS, and that the heights of both triangles are equal, since PS is parallel to MN and therefore the distance between PS and MN is the same at both ends. Therefore, the areas of these two triangles are equal.
Also considering △MQT and △NRT.
It is obvious that they share a base, QT, and that the heights of both triangles are equal, since QT is parallel to RS and therefore the distance between QT and RS is the same at both ends.
Therefore, the areas of these two triangles are also equal.
Since we have shown that the areas of △PMS and △SOR are equal, and the areas of △MQT and △NRT are equal, we can conclude that △PMS+△MQT = △SOR + △NRT.
This was using the properties of parallelograms and the fact that the triangles share a common base with equal heights.
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a computer selects a number from 0 to 5 randomly and uniformly. round all answers to 4 decimal places where possible. what is the distribution of ? ~ u( , ) suppose that the computer randomly picks 39 such numbers. what is the distribution of for this selection of numbers. ~ n( , ) what is the probability that the average of 39 numbers will be less than 2.7?
The distribution of U is 0.8634.
The distribution of for this selection of numbers ~ n is 2.7.
The probability that the average of 39 numbers will be less than 2.7 is 80.69%.
Let X be the random variable that represents the number selected by the computer. Since the computer selects a number from 0 to 5 uniformly, the distribution of X is a discrete uniform distribution. This means that each number from 0 to 5 has an equal probability of being selected, which is 1/6 or approximately 0.1667
Population standard deviation = (5-0)/(12) = 1.4434
Therefore, the standard deviation of the sample mean for a sample size of 39 is:√
Standard deviation of sample mean = 1.4434/√(39) = 0.2319
To calculate the probability that the average of 39 numbers will be less than 2.7, the population mean (in this case, 2.5), σ is the population standard deviation, and n is the sample size.
Using the values we have calculated, we get:
z = (2.7 - 2.5) / (0.2319) = 0.8634
To find the probability of the sample mean being less than 2.7, we need to find the area under the standard normal distribution curve to the left of z = 0.8634.
The distribution of the sample mean for a sample size of 39, and the probability of the average of 39 numbers being less than 2.7.
This can be done using a standard normal distribution table or a calculator that can perform normal distribution calculations. The probability turns out to be approximately 0.8069, or 80.69%.
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needed help w this math
Answer:
Step-by-step explanation:
well you dont get an answer
The function f(x)=−(x−3)2+7 is written in vertex form and shows that the vertex of the graph of f is located at (3, 7) . Each value of the f can be obtained from two different x -values except f(x)=7 . Which best explains why f(x)=7 is the output for only one input value?
f(x) = 7 is the output for only one input value, which is x = 3, because this is the only value that results in the maximum value of the function.
What is function?In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.
The function f(x) = −(x−3)²+7 is a quadratic function in vertex form. The vertex form of a quadratic function is given by f(x) = a(x - h)² + k, where (h, k) is the vertex of the parabola.
In this case, the vertex is (3, 7), which means that the parabola opens downwards and has a maximum value of 7. This also means that any value of f(x) less than 7 can be obtained from two different values of x, since the parabola is symmetric around its vertex.
However, f(x) = 7 is the maximum value of the function and can only be obtained for a single value of x, which is the x-coordinate of the vertex, namely x = 3. This is because the vertex is the highest point on the parabola, and any other value of x will result in a lower value of f(x).
Therefore, f(x) = 7 is the output for only one input value, which is x = 3, because this is the only value that results in the maximum value of the function.
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For the following problem write the simplest polynomial function with the given zeros: 2,
-1, and -8
Answer:
f(x) =x^2 - 3x^2 - 6x + 8.
Step-by-step explanation:
The length of a rectangle is 3cm
greater than it's width. The area of the rectangle is 180cm ². Find the
length and the width.
Please help with give brainiliest to whoever gets it right.
For the given Cuboid, the width will be equal to 4.5 cm.
What exactly is a cuboid?
A cuboid is a three-dimensional solid shape that has six rectangular faces, where opposite faces are equal in size and shape. A cuboid is also known as a rectangular parallelepiped or rectangular prism.
In a cuboid, the three pairs of opposite faces are parallel to each other and perpendicular to the other pair of faces. The cuboid has eight vertices or corners, twelve edges, and six rectangular faces.
Now,
We can use the formula for the volume of a cuboid to find the missing dimension:
Volume = Length x Width x Height
In this case, we are given the length and height of the cuboid, but we do not know its width. Let's assume that the width of the cuboid is "w". Then, we can write the equation:
220.5 = 7 x w x 7
Simplifying this equation, we get:
220.5 = 49w
Dividing both sides by 49, we get:
w = 4.5
Therefore, the third dimension of the cuboid is:
Width = 4.5 cm
So, the cuboid has three dimensions of 7 x 4.5 x 7 cm.
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the following statements is NOT true for the parabola se
ph?
is of symmetry is x-1.
ertex is (1,-3).
"coefficient is positive.
rabola has two positive
Answer:
The statement "parabola has two positive x-intercepts" is not true for the parabola described.
Hope This Helps!
a researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high school teachers who contributed to a candidate during a recent election cycle. given that no prior estimate of the population proportion is available, what is the minimum sample size such that the margin of error is no more than 0.04 for a 99% confidence interval?
Approximately, the minimum sample size required is n = 600.
What is the minimum sample size required to estimate the proportion?A researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high school teachers who contributed to a candidate during a recent election cycle. Given that no prior estimate of the population proportion is available, the minimum sample size such that the margin of error is no more than 0.04 for a 99% confidence interval is 600.
How to determine the minimum sample size?We use the following formula : n = (Zα/2)^2 × p × q ÷ E^2where,α = 1 - 0.99 = 0.01Zα/2 = Z0.005 from the standard normal distribution table Zα/2 = 2.58 (approx.)p = 0.5, as we don't have any prior information regarding the population proportion. q = 1 - p = 1 - 0.5 = 0.5E = 0.04Substitute the values in the formula to get: n = (2.58)^2 × 0.5 × 0.5 ÷ (0.04)^2n = 661.56.
Approximately, the minimum sample size required is n = 600.
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PLEASE HELP MEEE!!!
What is the value of X
What is the value of ARC MP
Answer:
x = 19, ARC MP = 104º
Step-by-step explanation:
9x-43 = 5x+33
4x = 76
x = 19
Arc MP = 360 - (9x-43 + 5x+33)
Arc MP = 360 - (9(19)-43 + 5(19)+33)
= 360 - 256
MP = 104º
plssss I will fail the whole course I beg u
A function is shown in the table. x g(x) −3 17 −1 −3 0 −4 2 13 Which of the following is a true statement for this function? (5 points) The function is increasing from x = −3 to x = −1. The function is increasing from x = −1 to x = 0. The function is decreasing from x = 0 to x = 2. The function is decreasing from x = −3 to x = −1.
Answer:
Step-by-step explanation:
What is the volume
of a pyramid with
sides of 22 inches and
30 inches, and a
of height of 15 inches?
Answer: 3300
Explanation: V=lwh/3=22x30x15/3=3300
in a study, 40% of adults questioned reported that their health was excellent. a researcher wishes to study thehealth of people living close to a nuclear power plant. among 13 adults randomly selected from this area, only3 reported that their health was excellent. find the probability that when 13 adults are randomly selected, 3 orfewer are in excellent health.a) 0.112 b) 0.169
If 40% of adults questioned reported that their health was excellent, then the probability that when 13 adults are randomly selected, 3 or fewer are in excellent-health is (b) 0.169.
The number of adults randomly selected is = 13 adults,
We need to find probability of getting 3 or fewer people reporting excellent health which is considered as success , in 13 trials
The probability of success = 0.4 ...because proportion of adults reporting excellent health in general population.
We use "binomial-probability" formula to calculate probability:
⇒ P(X ≤ 3) = ΣP(X = k), for k = 0, 1, 2, 3
where X = number of successes = people reporting excellent health and P(X = k) = probability of getting exactly k successes;
⇒ P(X = k) = C(n,k) × p^k × (1-p)^(n-k),
where n = number of trials, p = probability of success, and
substituting values,
We get,
⇒ P(X ≤ 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3),
⇒ C(13,0) × (0.4)⁰ × (0.6)¹³ + C(13,1) × (0.4)¹ × (0.6)¹² + C(13,2) × (0.4)² × (0.6)¹¹ + C(13,3) × (0.4)³ × (0.6)¹⁰,
≈ 0.1686 ≈ 0.169.
Therefore, the required probability is approximately 0.169, the correct option is (b).
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can yall help me please?
The mean travel time for the 7 students is approximately 8.6 minutes, and the median travel time is 8.5 minutes.
To find the mean travel time, we need to add up all the travel times and divide by the total number of students:
Mean = (8 + 14 + 12 + 9 + 7 + 5 + 5) / 7
Mean = 60 / 7
Mean ≈ 8.6 (rounded to one decimal place)
So, the mean travel time for the 7 students is approximately 8.6 minutes.
To find the median travel time, we need to arrange the travel times in order from smallest to largest:
5, 5, 7, 8, 9, 12, 14
There are 7 students, so the median is the middle value. In this case, the middle value is the average of the 4th and 5th numbers:
Median = (8 + 9) / 2
Median = 8.5
So, the median travel time for the 7 students is 8.5 minutes.
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Given: ABC is a right triangle with right angle C. AC=15 centimeters and m∠A=40∘.
What is BC ?
To find the length of side BC, we'll use right-triangle trigonometry as follows:
The value of the tangent function for the measure of angle A = (the length of the side opposite angle A)/(the length of the side adjacent to angle A)
tan 40° = BC/AC
tan 40° = BC/15 cm
Now, multiply both sides by 15 cm:
(tan 40°)(15 cm) = (BC/15 cm)(15 cm)
(tan 40°)(15 cm) = (BC)(15 cm/15 cm)
(tan 40°)(15 cm) = (BC)(1)
BC = (tan 40°)(15 cm)
Now, using a table of values for the trigonometric functions for angles from 0° to 90° or using a scientific calculator, we find that tan 40° = .8391 (to 4 decimal places). Now, substituting on the right side we get:
BC = (.8391)(15 cm)
BC = 12.6 cm to the nearest tenth of a centimeter.
in a hypothetical study, 200 patients with breast cancer were treated by surgery and another 200 patients with breast cancer were treated by radiation therapy. the treatment methods were randomly assigned. all patients were followed for 2 years, and the mortality rates between the two groups of patients were compared at the end of the follow-up. this study is a(n)
RCTs are considered one of the gold standards for evaluating the effectiveness of medical interventions because they can provide strong evidence of causality.
What type of study design was used in a hypothetical study ?The study described in the question is a randomized controlled trial (RCT). An RCT is a type of experimental study where participants are randomly assigned to different groups, and the effect of an intervention is evaluated by comparing outcomes between the groups. In this case, the intervention is the type of treatment (surgery vs radiation therapy), and the outcome of interest is the mortality rate after 2 years.
Random assignment of patients to treatment groups helps to reduce the influence of confounding variables and biases, thus allowing a more accurate assessment of the intervention's effects. In addition, by following patients over a specific period of time, the study can provide information about the long-term effects of the treatment.
Overall, RCTs are considered one of the gold standards for evaluating the effectiveness of medical interventions because they can provide strong evidence of causality.
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if you are on a 2,000 calorie diet per day, and you are aiming for 20% to come from fat/lipids, how many grams of fat would you try to consume?
You should try to consume approximately 44.44 grams of fat per day.
To calculate how many grams of fat you should consume on a 2,000 calorie diet with 20% of calories coming from fat,
follow these steps:
Determine the total calories from fat:
20% of 2,000 calories = 0.20 x 2,000 = 400 calories from fat.
Convert calories to grams:
There are 9 calories in 1 gram of fat. To find out how many grams of fat you should
consume, divide the calories from fat by the calories per gram:
400 calories / 9 calories/gram = 44.44 grams of fat.
So, if you are on a 2,000 calorie diet and aiming for 20% of your calories to come from fat, you should try to consume
approximately 44.44 grams of fat per day.
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KN is tangent to circle � O at point � K. If m � � ⌢ = 9 8 ∘ m KA ⌢ =98 ∘ , find m ∠ � � � m∠AKN.
If m � � ⌢ = 9 8 ∘ m KA ⌢ =98 ∘, By solving we finf that m∠ � � � m∠AKN = m∠KNO = 90 degrees.
What is tangent?A tangent is a straight line or plane that intersects a curve or curved surface at exactly one point, called the point of tangency.
Since KN is tangent to circle O at K, we have ∠KNO = 90 degrees.
Also, ∠KAN is an external angle to triangle AKO, so we have:
∠KAN = ∠KAO + ∠AKO
But ∠KAO is equal to ∠KNO (since both are 90 degrees), so we can rewrite the above as:
∠KAN = ∠KNO + ∠AKO
Substituting in the given values, we get:
98 = 90 + ∠AKO
Solving for ∠AKO, we get:
∠AKO = 8 degrees
Finally, since ∠AKN is an inscribed angle that intercepts arc AN, we have:
m∠AKN = 1/2 × m(arc AN)
Since arc AN is the complement of arc KO (since they add up to a full circle), we have:
m(arc AN) = 180 - m(arc KO)
m(arc KO) = m∠KNO (since both arc KO and ∠KNO intercept the same segment KN)
m∠KNO = 90 degrees (as noted above)
Therefore, we have:
m(arc AN) = 180 - m∠KNO = 180 - 90 = 90 degrees
Substituting this into the formula for m∠AKN, we get:
m∠AKN = 1/2 × m(arc AN) = 1/2 × 90 = 45 degrees
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RSM WORK HELLLPPP
|x-7|=x-7
solve the equation
PLEASE HELP
Answer: x≥7
Step-by-step explanation:
PLS HELPP ME NOWWWWW ASAP
Answer:
A
Step-by-step explanation:
the Least common factor is 12
17/3 (x-3/2) =-5/4
17/2x -17/2 =-5/4
12*17/3x -12*17/2 = 12*-5/4
4*17x - 6*17= 3*-5
68x -102= -15
68x= 102-15
68x= 87
x=87/68
if we didn't know the proportion of students that expect to drop the class, and we wanted to estimate a 95% ci with a margin of error of 3%. then the sample size needed would be?
The required sample size is approximately 1068 students to estimate a 95% confidence interval with a margin of error of 3%
The estimate a 95% confidence interval with a margin of error of 3%, we need to determine the required sample size. We can do this using the following steps:
1. Identify the confidence level and margin of error: In this case, we want a 95% confidence interval, which corresponds to a z-score of 1.96 (found in a standard normal distribution table). The margin of error is 3% or 0.03.
2. Determine the maximum variance: Since we don't know the true proportion (p) of students expecting to drop the class, we need to assume the maximum variance, which occurs when p = 0.5. This will give us a conservative estimate for the required sample size.
3. Calculate the sample size:
Using the formula n =[tex](Z^2 * p * (1-p)) / E^2[/tex], where n is the sample size, Z is the z-score (1.96), p is the proportion (0.5), and E is the margin of error (0.03).
n =[tex] (1.96^2 * 0.5 * 0.5) / 0.03^2[/tex]
n ≈ [tex]1067.1[/tex]
4. Round up the sample size: Since we cannot have a fraction of a student, we round up the sample size to the nearest whole number.
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Can someone PLEASE help me with this ASAP? it’s due today!! Do part A, B, and C. I will give brainliest!!
100 points and brainliest!!
The experimental probability for the numbers are:
P(3) = 1/12 (in fraction)
P(3) = 0.08 (in decimal)
P(3) ≈ 8% (in percentage)
P(6) = 3/12
P(6) = 0.25
P(6) = 25%
P(less than 4) = 6/12
P(less than 4) = 0.5
P(less than 4) = 50%
How to find the experimental probability?Probability is the likelihood of a desired event happening.
Experimental probability is a probability that relies mainly on a series of experiments.
Blake rolled a die 12 times and 3 appears once (Given in the table). The experimental probability for 3 will be:
P(3) = 1/12 (in fraction)
P(3) = 0.08 (in decimal)
P(3) ≈ 8% (in percentage)
Blake rolled a die 12 times and 6 appears 3 times (Given in the table). The experimental probability for 6 will be:
P(6) = 3/12
P(6) = 0.25
P(6) = 25%
The numbers less than are 1, 2 and 3. Six of the twelve outcome in the table are less than 4.
P(less than 4) = 6/12
P(less than 4) = 0.5
P(less than 4) = 50%
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please help me!!!!
PLease hurry!!!!
The absolute value equation is |x - 11| = 6.
Howe to write the absolute value equation?Givent he values 5 and 17 on the numberr line, we want to write an absolute value equation in the form |x - c| = d.
Now, given two numbers a and b, we have that
c = (a + b)/2 and d = (b - a)/2So, given that
a = 5 and b = 17,we have that
c = (a + b)/2
= (5 + 17)/2
= 22/2
= 11
Also, given that
a = 5 and b = 17,we have that
d = (b - a)/2
= (17 - 5)/2
= 12/2
= 6
So, to write the absoiute value equation, we substitute the values of the variables into the equation
|x - c| = d.
So, substituting the values of the variables into the equation, we have that
|x - c| = d.
|x - 11| = 6.
So, the absolute value equation is |x - 11| = 6.
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Which point is a vertex of the hyperbola?
O (1,-15)
O (1,-2)
O (1,3)
O (1,11)
Option C. is correct one, (1, 3) is a vertex (out of two) of the hyperbola.
Define the vertex of hyperbola?In a hyperbola, the vertex refers to the point where the transverse axis intersects the hyperbola. The transverse axis is the axis that passes through the two vertices of the hyperbola, and it is perpendicular to the imaginary axis that separates the two branches of the hyperbola.
There are two vertices in a hyperbola, one on each side of the imaginary axis. The distance from each vertex to the center of the hyperbola is equal to the value of the constant.
The question specifies that the dot on the hyperbola denotes the vertices in both graph,
They are (1,3) and (1,- 7)
However, (1,3) is on the given option of possible answers, while (1,-7) is not,
Thus , (1,3) is a vertex (out of two) of the hyperbola.
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Write the equation of a line perpendicular to y= - 2/3x -1 that goes through (6,2)
Answer: y = (3/2)x - 7
Step-by-step explanation:To find the equation of a line perpendicular to another line, we need to know that the slopes of two perpendicular lines are negative reciprocals of each other. Therefore, the slope of the line we're looking for will be the negative reciprocal of -2/3, which is 3/2.
Now we can use the point-slope form of the equation of a line, which is y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope.
We know that the line we're looking for goes through the point (6,2), so x1 = 6 and y1 = 2. We also know that the slope is 3/2. Substituting these values into the point-slope form, we get:
y - 2 = (3/2)(x - 6)
Simplifying and putting the equation into slope-intercept form, we get:
y = (3/2)x - 7
So the equation of the line perpendicular to y = -2/3x -1 that goes through the point (6,2) is y = (3/2)x - 7.
f(x)=x(x
2
+1)(x+5)(x
2
−3)
F(x) is a degree 6 polynomial having roots at x = 0, I -5, and 3.
As F(x) contains six elements in the form of (x-a), where an is a root, the degree of F(x) is 6. We discover that the roots are x=0, I -5, and 3 when we set each component to zero. By resolving each issue independently, their roots can be discovered. For instance, x=0, I is obtained from x(x2+1)=0. We obtain x=-5 from (x+5)=0. We get x=3 from (x2-3)=0. The roots of F(x) are significant because they reveal where the function crosses the x-axis and where its extrema are.
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