The solution of the given system of equations 3x + 6y = 2 , 15x -30y = 10 is equal to x = 2/3 and y = 0.
As given in the question,
Given system of equations are :
3x + 6y = 2 ____(1)
15x -30y = 10 _____(2)
Multiply equation (1) by 5 and add it to equation (2) to eliminate y and get the value of x we have,
15x + 30y = 10
15x - 30y = 10
30x = 20
⇒x = 20 / 30
⇒ x = 2 / 3
Substitute value of x = 2/3 in equation (1) to get the value of y,
3(2/3) + 6y = 2
⇒ 2 + 6y = 2
⇒ 6y = 0
⇒ y = 0
Therefore, the solution of the given system of equations is equal to x = 2/3 and y =0.
The above question is incomplete, the complete question is:
What is the solution of the system of equations 3x + 6y = 2 , 15x -30y = 10?
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i need help please.
Answer: ( x + 5, y + 11)
Step-by-step explanation:
Let's pick point S at ( -9, -9); it changes to point S' at (-4, 2)
We see the x increase by 5 and the y increase by 11, so the answer is
( x + 5, y + 11)
what is the largest integer that always divides $(n 1)(n 3)(n 5)(n 7)(n 9)$ for all positive even integers $n$?
The largest integer that always divides (n+1)(n+3)(n+5)(n+7)(n+9) for all positive even integers n is 15.
What is positive integer?Positive integers are numbers such as 1, 2, 3, etc. They are also called countable or natural numbers. A positive number is any number greater than zero.
Let P(n) = (n+1)(n+3)(n+5)(n+7)(n+9) be a polynomial for all positive even integers, n . We have to calculate the largest integer that always divides the P(n) .
Let "l" be the largest integer that divides P(n) for each n∈N . Then, l must divide both P(1) and P(2)
i.e, P(1) = (1+1)(1+3)(1+5)(1+7)(1+9) = 2×4×6×8×10
= 2^8×5×3
P(2) = 3×5×7×9×11 , hence , l divides 15.
Since, n + 5 ≡ (n+2) mod(3), one (and exactly one) of the numbers n+1 , n+3 , n+5 must be multiple of 3 . Thus, 3/P(n) for each n∈N.
Since, n+7 ≡ (n+2)mod(5) and n+9 ≡ (n+4)mod(5),
one (and exactly one) of the numbers n+1 , n+3 , n+5 , n+7 and n+9 , must be multiple of 5.
Thus, 5/P(n) for each n∈N.
Therefore, 15/p(n) for each n∈N , so that l = 15 .
So, required value of n is 15.
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Which of the quantities below represents a velocity?
A. 25 m/s
B. 10 km/min
C. 15 mi/h eastward
D. 3 mi/h
Step-by-step explanation:
Velocity is a measure of the rate at which an object moves through space. It is a vector quantity, meaning that it has both magnitude (size) and direction. The standard unit for velocity is meters per second (m/s).
Of the quantities listed above, the following represent velocities:
A. 25 m/s: This represents a velocity of 25 m/s, because it gives both the speed (magnitude) and direction of the object's movement.
C. 15 mi/h eastward: This represents a velocity of 15 miles per hour (mi/h) in an eastward direction, because it gives both the speed and direction of the object's movement.
D. 3 mi/h: This represents a velocity of 3 mi/h, because it gives both the speed and direction (implied to be eastward or westward) of the object's movement.
B. 10 km/min: This does not represent a velocity, because it gives the distance traveled (10 km) but not the time over which the distance was traveled. Without the time, it is not possible to determine the speed or rate of movement.
Can in text citations be shortened?
Harvard in-text citations allow for the inclusion of up to three authors. When there are four or more authors, et al. is used to shorten the citation.
What are text citations?In-text citations in APA style are used to quickly describe the sources of your information within the text of your research report.
The reader is directed to more detailed information in the Reference list by succinct in-text citations.
The author's last name and the year of publication are used in APA in-text citations,: (Field, 2005). Include the page number when using direct quotations, as in the following example: (Field, 2005, p. 14).
Reduce the source title or organization name, excluding any articles, to the first word or phrase in the in-text citation if it is longer than four words (a, an, and the).
The alphabetized word for the source in the Works Cited should be the first word in the abbreviated title or organization name.
Therefore, Harvard in-text citations allow for the inclusion of up to three authors. When there are four or more authors, et al. is used to shorten the citation.
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Please help me with this question
many thanks
answer :
d÷d = 0
then 10 remain
a rectangular field will be bounded by a wall on one side and by fencing on the other three sides. what is the largest area you can enclose with 120 feet of fencing?
The largest area you can enclose with 120 feet of fencing is 900 square feet.
To find the maximum area you can enclose with 120 feet of fencing, you can use the formula for the area of a rectangle, which is A = lw, where A is the area, l is the length, and w is the width. Since the length of the rectangle is bounded by a wall and cannot be changed, the width will be the variable we seek to maximize.
Since the perimeter of the rectangle is fixed at 120 feet, we can set up the following equation:
2l + 2w = 120
This equation represents the total length of the fence needed to enclose the rectangular field. We can solve for w in terms of l by rearranging the equation as follows:
2w = 120 - 2l
w = (120 - 2l)/2
To maximize the area of the rectangle, we want to maximize the value of w. We can do this by making l as small as possible, since this will make w as large as possible. Therefore, we can set l equal to the minimum possible value, which is the length of the wall.
Let's say the length of the wall is x feet. Then, we can substitute x for l in the equation for w to find the maximum possible width:
w = (120 - 2x)/2
To find the maximum area, we can then substitute this value for w back into the formula for the area of a rectangle:
A = lw
= x((120 - 2x)/2)
= (120x - 2x^2)/2
This is a quadratic function, and we can use the techniques for maximizing quadratic functions to find the maximum value of A. To do this, we take the derivative of the function and set it equal to zero:
A' = (120 - 4x)/2 = 0
120 - 4x = 0
x = 30
Substituting this value back into the equation for A, we find that the maximum possible area is:
A = (120 * 30 - 2 * 30^2)/2
= (3600 - 1800)/2
= 1800/2
= 900 square feet
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How do you add rational expressions examples?
The Example of addition of Rational Expressions is "Add 2/3 and 6/7" .
The Rational Expression is defined as the expression , that is represented in the form of p/q , where q ≠ 0 .
Example of Addition of Rational Expression is
Add 2/3 + 6/7 .
In order to add the above two rational expression , we first make the denominator of both the terms same by taking LCM ,
the LCM of denominators 3 and 7 is 21 .
So , the expression becomes ⇒ 14/21 + 18/21 .
⇒ (14 + 18)/21
Simplifying further ,
we get ;
⇒ 32/21
Therefore , the example of addition of rational expressions is explained above .
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What is a linear graph formula?
y = MX + b is the required linear graph formula.
What is the linear graph formula?Linear equations with two variables have straight-line graphs.
There are numerous ways to express linear equations: Y = mx+ b is the slope-intercept form.
The slope is m and the y-intercept is the point in an equation of the type y = MX + b, such as y = 2x 3. (0, b).
Write the equation in the form y = MX + b to determine the slope m and the y-intercept.
This will allow you to graph the equation using the slope and y-intercept (0,
b).
Plot the y-intercept next.
3) Depending on whether the slope is positive or negative, go up, down, or left or right from the y-intercept.
Therefore, y = MX + b is the required linear graph formula.
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What are the 3 different options for horizontal asymptotes?
The 3 different options for horizontal asymptotes are:
If the degree of the numerator < the degree of the denominator.If the degree of the numerator = degree of the denominator. If the degree of the numerator > the degree of the denominator.What are horizontal asymptotes?This refers to a horizontal line y = b where the graph approaches the line as the inputs approach infinity (∞) or negative infinity (–∞).
The 3 different options for horizontal asymptotes
If the degree of the numerator < the degree of the denominator, y = 0 (x-axis), and If n<m, the x-axis, y=0 is the horizontal asymptote.If the degree of the numerator = degree of the denominator. If n=m, then y=an / bm . That is, the ratio of the leading coefficients.It is the horizontal asymptote. If the degree of the numerator > the degree of the denominator. If n>m, there is no horizontal asymptote.Note: If n=m+1, there is an oblique or slant asymptote.
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Jing just got a new job. She started at a pay rate of $12.50 per hour and will get a $0.50 raise each year. Max started a job where his salary is found by the equation: f(x) = x + 10 , where x is the number of years.
Interpret the rates of change and initial values of the linear functions in terms of the situations they model. Compare the results and what they mean. How many years must they both work for Max to earn more per hour than Jing?
Jing
Initial value:
Rate of change:
Max
Initial value:
Rate of change:
Jing's initial pay rate is $12.50 per hour. She will receive a pay raise of $0.50 per hour every year.
Max's initial pay rate is 10 dollars per hour. He will receive a pay raise of 1 dollar per hour every year.
To determine how many years it will take for Max to earn more per hour than Jing, we need to find the point at which the two linear equations intersect. This can be done by setting the two equations equal to each other and solving for x.
Jing's equation is: $12.50 + 0.50x
Max's equation is: x + 10
Setting the equations equal to each other and solving for x, we get:
$12.50 + 0.50x = x + 10
This simplifies to:
$0.50x = -2.50
Dividing both sides by 0.50, we get:
x = -5
Since the value of x cannot be negative, this means that Max will never earn more per hour than Jing.
find an equation of the tangent line to the curve at the given point. y = 8ex cos(x), (0, 8)
The equation of the line tangent to the curve at the points , y = 8ex cos(x), (0, 8) as calculated is y' = 0.
We will differentiate y = 4ex cos(x) so as to find the required equation.
we get the differential as ,
y' = - 8eˣsin(x)
given the value of x as 0 and y as 8
y' = -8e⁰sin(0)
Now as we know that the value of sin( 0 ) is 0 , therefore the equation becomes,
y'= 0
Differentiation is a branch of calculus which is used to calculate the rate of change in a given object in a specified time. The other branch of calculus is integration.
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The equation of a parabola is y=5x^2+15x–25. Write the equation in vertex form.
Write any numbers as integers or simplified proper or improper fractions
The equation of the parabola y = 5 · x² + 15 · x - 25 in vertex form is y + 145 / 4 = 5 · (x + 3 / 2)².
How to find the vertex form of a quadratic equation
Herein we find the equation of a parabola in standard form, that is, an equation of the form:
y = a · x² + b · x + c
Where:
a, b, c - Real coefficientsx - Independent variabley - Dependent variableFrom this equation we must derive the vertex form, whose definition is shown below:
y - k = C · (x - h)²
Where:
C - Vertex constant(h, k) - Coordinates of the center.The vertex form is found by algebra properties. First, write the equation of the parabola:
y = 5 · x² + 15 · x - 25
Second, use algebra properties until the vertex form is found:
y + 25 = 5 · x² + 15 · x
y + 25 = 5 · (x² + 3 · x)
y + 25 + 45 / 4 = 5 · (x² + 3 · x + 9 / 4)
y + 145 / 4 = 5 · (x + 3 / 2)²
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What are the 3 types of forecasting?
The three main types of forecasting are qualitative, quantitative, and time series.
What is forecasting?Forecasting is a predictive tool used to make decisions and plan for the future. It involves analyzing past trends and data to predict future events and outcomes. Forecasting helps businesses and organizations prepare for potential market changes, plan ahead for budgeting, and make informed decisions. It is also an invaluable tool for understanding consumer behavior and market trends.
Qualitative forecasting is a subjective approach that relies on expert opinion, intuition, and past experiences. Quantitative forecasting is a more structured approach that uses statistical techniques and data-driven models to make predictions. Time series forecasting is a form of quantitative forecasting that uses historical data to predict future values. It is especially useful for predicting cyclical trends and seasonal variations. All three approaches can be used together to create a comprehensive forecasting strategy for a business.
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Why is the power of 2 called square?
The power of 2 is called a square due to the definition of the area of a square.
What are a square and Power?
A square is a quadrilateral with four equal sides and four equal angles that is a regular quadrilateral. The square's angles are at a straight angle or 90 degrees. The square's diagonals are also equal and split at a 90-degree angle.
The base number is the factor that is multiplied by itself, and the exponent is the number of times the same base number has been multiplied. Power is defined as a base number raised to the exponent.
The power of two is called a square.
The square function's name derives from the fact that a square with sides of length [tex]l[/tex] equals [tex]l^2[/tex] has a significant role to play in the definition of area.
The area is inversely proportional to size: the area of a form that is [tex]n[/tex] times larger is [tex]n^2[/tex] times larger.
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What is the value of |a-b|+|b-a| if a=b-1/2
The value of the absolute expression |a - b| + |b - a| will be 1.
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
The equation is given below.
a = b - 1/2
The expression is given as,
⇒ |a - b| + |b - a|
The value of (a - b) is given as,
a = b - 1/2
a - b = - 1/2
And the value of (b - a) is given as,
a = b - 1/2
b - a = 1/2
Then the value of the expression is calculated as,
⇒ |a - b| + |b - a|
⇒ |-1/2| + |1/2|
⇒ 1/2 + 1/2
⇒ 1
The worth of the outright articulation |a - b| + |b - a| will be 1.
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Your friend hides a dollar bill under one of three plastic cups. Under the other
two cups is a paper clip. You get to keep whatever is under the cup you
choose, but you don't know which contains the dollar bill. After you choose,
your friend lifts one of the other cups to reveal a paper clip and then gives you
the option of changing your choice.
Should you switch to the other cup?
Answer:
Yes, you should
Step-by-step explanation:
Because the probability of winning the dollar increases from \frac{1}{3} 3 1 to \frac{2}{3} 3 2 by switching.
Use elimination method to solve the following system of equations
6x+y=-4
6x+5y=4
Answer:(-1,2)
Step-by-step explanation:
-(6x+y=-4)
6x+5y=4
------------------
-6x-y=4
6x+5y=4
--------------
4y=8
y=2
6x+2=-4
6x=-6
x=-1
E-loan, an online lending service, recently offered 36-month auto loans at 6% compounded monthly to applicants with good credit ratings. If you have a good credit rating and can afford monthly payments of $539, how much can you borrow from E-loan? What is the total interest you will pay for this loan?
I can borrow $17717.48from E-Loan.
The interest I will pay for the loan is $1,686.52
Now, According to the question:
We know,
The formula of present value is
PV = PMT [tex](\frac{ 1-(1+i)^-^n}{i} )[/tex]
PMT = The monthly payment = $539
i= Rate of interest per period = 6%/12 = 0.005
n = The number of month = 36 months
Therefore,
PV = 539[tex](\frac{ 1-(1+0.005)^-^3^6}{0.005} )[/tex]
≈$17717.48
Therefore I can borrow $17717.48 from E-Loan.
The interest = Paid amount - Loan amount
=$[(539×36)-17717.48]
= $1,686.52
The interest I will pay for the loan is $1,686.52
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Which expression is equivalent to the following complex fraction (- 2 x 5 y )/( 3 y 2 x?
The expression expressed as a single fraction is -2y(yx-2)/3x(yx+5)
How to simplify the expression as a single fraction?You should know that simplification involves making an expression look more simpler than it was
The given expression is 2/(x+5/y)÷3/(y-2/x)
First of all let us express the denominator as a single fraction
x+5/y
⇒(yx +5)/y
In the same way express the expression y-2/x = (yx-2)÷x
By substitution we have
(-2)/yx+5)/(y/3)÷(yx-2/x)
⇒(-2y)/(yx+5) ÷ (3x/ (yx -2)
Simplifying this further to get
(-2y)/(yx +5) * (yx -2)/(3x)
⇒-2y(yx-2)/3x(yx +5)
In conclusion, the expression expressed as a single fraction is -2y(yx-2)/3x(yx+5)
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Correct question:
Which expression is equivalent to the following complex fraction? -2/x+5/y/3/y-2/x
Answer:the answer is
Step-by-step explanation:
just did the test
Solve the equation:5(3+6a)=-15+6(5+5a)
Answer:
0.5Step-by-step explanation:
To solve the equation 5(3+6a) = -15+6(5+5a), we need to use the rules of algebra to isolate the variable "a" on one side of the equation and simplify the other side.
First, we can distribute the 5 on the left side of the equation to obtain 53 + 56a = -15+6(5+5a). This gives us 15 + 30a = -15+6(5+5a).
Next, we can distribute the 6 on the right side of the equation to obtain 15 + 30a = -15+65 + 65a. This gives us 15 + 30a = -15+30 + 30a.
Now we can combine like terms on both sides of the equation to obtain 30a = -15 + 30, which simplifies to 30a = 15. Finally, we can divide both sides of the equation by 30 to obtain a = 0.5.
Therefore, the solution to the equation 5(3+6a) = -15+6(5+5a) is a = 0.5
What is the equation in slope-intercept form of the line that passes through the point (2,-2)
and is perpendicular to the line represented by y = 2/5x+ 2?
A y=5/2x-7
в y=5/2x+7
c y=-5/2x-3
D y=-5/2x+3
Answer:
D, [tex]y=\frac{-5}{2x}+3[/tex]
What is a parallel class 6?
In geometry, parallel lines are the lines which maintain the same distance apart from each other and never intersect at any point.
What is parallel class 6?
In geometry, parallel lines are the lines which maintain the same distance apart from each other and never intersect at any point.
All rungs are perpendicular to the left post is a line perpendicular to one of a set of parallel lines, it is perpendicular to all parallel lines.
The rungs are parallel
lines that are perpendicular to the same line are parallel.
The rungs are perpendicular to both posts and the posts are parallel to each other.
if a line is perpendicular to one of a set of parallel lines, it is perpendicular to all the parallel lines.
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which of the following sets of transformations could be used to prove that the line segments are congruent?
A transition of AB6 units to the right followed by a transition 6 unit down this transformations could be used to prove that the line segments are congruent.
How do you know if a line segment is congruent?Line segments of the same length are known as congruent segments. Congruent refers to equality. The standard method for identifying congruent line segments is to draw the same number of tiny, perpendicular tic lines in the middle of each section. By placing a line over the two endpoints of a line segment, we can identify it.A line segment is a section of a straight line that is enclosed by two clearly defined end points and contains every point on the line located within. The Euclidean distance between two ends of a line segment determines its length.Half-open line segments contain exactly one of the endpoints, while closed line segments have both of the endpoints. Open line segments do not contain either of the endpoints.To learn more about line segment refer :
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How do you solve 7 step equations?
To solve a 7 step equation, identify the equation, isolate the variable to one side of the equation, simplify the equation if necessary, divide both sides of the equation by the coefficient of the variable.
1. Identify the equation.
2. Limit the variable to only one side of the problem.
3. Simplify the equation, if necessary.
4. Divide both sides of the equation by the coefficient of the variable, if necessary.
5. Continue carrying out steps 2-4 until the equation is resolved.
6. Check your solution by substituting the solution back into the equation.
7. Write the solution in the form of an equation.
To solve a 7 step equation, identify the equation, isolate the variable to one side of the equation, simplify the equation if necessary, divide both sides of the equation by the coefficient of the variable, repeat steps 2-4 until the equation is solved, check your solution by substituting it back into the equation, and then write the solution in the form of an equation.
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Characterize observational study with respect to nature of the sample and treatment.
An observational study is used to answer a research question based purely on what the researcher observes.
What Is an Observational Study?An observational study is a statistical study that does not have any treatment or intervention done by the researchers.
Observational research allows the researcher to see what their subjects really do when confronted with various choices or situations. The term refers to the study of non-experimental situations in which behaviour is observed and recorded.
Statistics is the process of collecting data about a group of objects to draw conclusions about populations of those objects. For example, a statistician may take a sample group of workers from company XYZ and have them rate their job satisfaction with the company. Based on the results of that sample, the statistician can make educated assumptions about all the employees of company XYZ and their job satisfaction.
However, observational studies can only establish that significant associations exist between predictor and outcome variables. Observational studies cannot establish that the associations identified represent cause-and-effect relationships.
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What is the process of forecasting future expenses and savings called?
The process of forecasting future expenses and savings is called financial planning.
What is forecasting?Forecasting is the process of predicting future events or outcomes based on past data, trends, and other information. It is an important tool for businesses, allowing them to plan ahead and make informed decisions. Forecasting can help organizations anticipate changes in the market, anticipate customer demand, plan investments, and more. If done properly, it can help organizations achieve their goals and maximize profits.
Financial planning is the process of creating a budget, setting goals, and developing strategies to help manage money and reach financial goals. It includes estimating future income and expenses, assessing current financial resources, and creating a plan for spending, saving, and investing. Financial planning can help you to stay on track towards meeting your financial goals and create a secure financial future.
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A bag contains 3 basketballs, 10 baseballs, 7 golf balls, and 5 footballs. A ball is chosen at random,not replaced, then another is chosen. Find each probability
17. P(a football, then a baseball)
18.P(two baseballs)
This is based on Conditional Probability.
P(a football, then a baseball) is 0.08333 and P(two baseballs)
is 0.15
What is Conditional Probability?The chance of an event happening given that another event has already occurred (via assumption, supposition, statement, or evidence) is known as conditional probability in the field of probability theory. This particular approach depends on event B happening in some way connected to another event A. In this case, a conditional probability analysis with respect to event B is possible. The probability of A under the condition B is typically expressed as P(A|B) or PB if the event of interest is A and the event B is known to have occurred or is assumed to have done so (A). This can alternatively be thought of as the percentage of probability that B crosses A:
P(A|B)=P(A∩B)/P(B)
Calculation:1) P(a football, then a baseball)= ([tex]\frac{5}{25}[/tex])×([tex]\frac{10}{24}[/tex]) =0.08333
2) P(2 Baseballs) = ([tex]\frac{10}{25}[/tex])×([tex]\frac{9}{24}[/tex]) = 0.15
This is based on Conditional Probability.
P(a football, then a baseball) is 0.08333 and P(two baseballs)
is 0.15
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Which two functions are inverses of each other?
The two functions are inverse to each other if the two graphs are symmetric with respect to the line y = x (mirror images over y = x ), then they are inverse functions.
Functions
A function is defined as a relation between a set of inputs having one output each. In simple words, a function is a relationship between inputs where each input is related to exactly one output.
inverse functions
the inverse function of a function f is a function that undoes the operation of f. The inverse of f exists if and only if f is bijective, and if it exists, is denoted by F^-1.
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The graph represents a quadratic function. Write an equation of the function in standard form.
The equation for the quadratic function in standard form is f(x) = x² - 11x + 24
Writing Quadratic equationFrom the question, we are to write an equation for the quadratic function in standard form.
From the given quadratic graph,
The roots of the function are 3 and 8.
That is,
x = 3 and x = 8
Then,
The factors of the quadratic function are (x -3) and (x - 8)
Thus,
We can write that
(x - 3)(x - 8) = 0
x² - 8x - 3x + 24 = 0
Simplify
x² - 11x + 24 = 0
Hence, the equation is f(x) = x² - 11x + 24
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What is the discriminant and nature of roots of 2x² 3x 5 0?
The discriminant of the quadratic equation 2x² + 3x - 5 = 0 is 49 and the nature of the roots are -3/4 + 7/4 and -3/4 - 7/4.
The discriminant of the quadratic equation 2x² + 3x - 5 = 0 is b² - 4ac = 9 - 4(2)(-5) = 49.
The nature of the roots of the equation can be determined by the discriminant. If the discriminant is positive, then the roots are real and distinct; if it is zero, then the roots are real and equal; and if it is negative, then the roots are complex and conjugate. In this case, the discriminant is positive, so the roots are real and distinct.
To calculate the roots, we use the quadratic formula:
x = [-b ± √b² - 4ac]/2a.
For this equation, a = 2, b = 3, and c = -5,
so x = [-3 ± √49]/2(2) = [-3 ± 7]/4 = -3/4 ± 7/4.
This means the two roots of the equation are -3/4 + 7/4 and -3/4 - 7/4.
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