- The document discusses linear equations in two variables. It defines linear equations and explains that a linear equation in two variables can be written in the form ax + by = c.
- It describes how linear equations in two variables have infinitely many solutions, represented by pairs of x and y values. The graph of a linear equation in two variables is a straight line.
- The document also discusses how equations of lines parallel to the x-axis or y-axis can be represented. The graph of an equation of the form x = a is a line parallel to the y-axis, while an equation of the form y = a graphs as a line parallel to the x-axis.
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A complete description of polynomials and also various methods to solve the Linear equation of two variables by substitution, cross multiplication and elimination methods.
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The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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2. Linear Equations In
Two Variables
“ The principal use of the analytic art is to
bring mathematical problem to
equations and to exhibit those equations
in the most simple terms that can be .”
3. Contents
• Introduction
• Linear equations
• Points for solving a linear equation
• Solution of a linear equation
• Graph of a linear equation in two variables
• Equations of lines parallel to x-axis and y-axis
• Examples and solutions
• Summary
4. Introduction
• An excellent characteristic of
equations in two variables is
their adaptability to graphical
analysis. The rectangular
coordinate system is used in
analyzing equations
graphically. This system of
horizontal and vertical lines,
meeting each other at right
angles and thus forming a
rectangular grid, is called the
Cartesian coordinate system. Cartesian Plane
5. Introduction
• A simple linear equation is
an equality between two
algebraic expressions
involving an unknown value
called the variable. In a
linear equation the
exponent of the variable is
always equal to 1. The two
sides of an equation are
called Right Hand Side (RHS)
and Left-Hand Side (LHS).
They are written on either
side of equal sign.
Equation LHS RHS
4x + 3 = 5 4x + 3 5
2x + 5y = 0 2x + 5y 0
-2x + 3y = 6 -2x + 3y 6
6. Cont…
• A linear equation in
two variables can be
written in the form of
ax + by = c, where a,
b, c are real numbers,
and a, b are not equal
to zero.
Equation a b c
2x+3y=9 2 3 -9
X+y/4-4=0 1 1/4 -4
5=2x 2 0 5
Y-2=0 0 1 -2
2+x/3=0 1/3 0 2
7. Linear equation :-
•
-3 -2 -1 0 1 2 3
A linear equation is an algebraic equation in which each term
is either a constant or the product of a constant and a single
variable. Linear equations can have one or more variables.
Linear equations occur with great regularity in applied
mathematics. While they arise quite naturally when modeling
many phenomena, they are particularly useful since many
non-linear equations may be reduced to linear equations by
assuming that quantities of interest vary to only a small
extent from some "background" state
X + 2 = 0
X = -2
8. Solution of a linear equation
Every linear equation has a unique
solution as there is a single variable in
the equation to be solved but in a
linear equation involving two
variables in the equation, a solution
means a pair of values, one for x and
one for y which satisfy the given
equation
Example- p (x)=2x+3y (1)
y in terms of x
If x=3
2x + 3y = (2x3) + (3xy) = 12
6 + 3y = 12
y = 2
therefore the solution is (3,2)
(2)If x = 2
2x + 3y = (2x2) + (3xy) = 12
4 + 3y = 12
y= 8/3
therefore the solution is (2,8/3)
Similarly many another
solutions can be taken out
from this single equation.
That is ,a linear equation in
two variables has infinitely
many solutions.
9. Graph of a linear equation is
representation of the linear
equation .
Observations on a graph
Every point whose coordinates
satisfy the equation lies on the
line. Every point on the line
gives a solution of the
equation. Any point, which
does not lie on the line is not a
solution of equation.
X+2Y=6
Graph of a linear equation in two
variables
10. A linear equation in one variable
represents a point on a number line
and a straight line parallel to any of
the axes in a coordinate plane.
11.
12.
13.
14.
15.
16.
17. • Example 1:
Represent the equation 2y + 3 = 0 graphically
on the number line in the Cartesian plane
• Solution:
(i) The equation 2y + 3 = 0 has a unique solution . Now,
the geometrical representation of 2y + 3 = 0
i.e., y = 1.5 on a number line is as follows.
Equations of lines parallel to x-axis
18. • (ii) The equation 2y + 3 = 0 can
be written as . Thus,
represents a straight line in
the Cartesian plane parallel
to x-axis and at a distance of
i.e., −1.5 from x-axis. The
graph of this equation has
been shown in the following
figure
19. Equations of lines parallel to y-axis
•
•
Equations of lines parallel to
y-axis The graph of x=a is a
straight line parallel to the y-
axis
In two variables, 2x + 9 = 0
represents a straight line
passing through point
(−4.5, 0) and parallel to y-axis.
It is a collection of all points of
the plane, having their x-
coordinate as 4.5.
20. Summary
•
•
•
•
•
•
•
•
•
An equation of the form ax +by + c =0,wherea,b and c are real numbers,
such that a and b are not both zero, is called a linear equation in two
variables.
A linear equation in two variables has infinitely many solutions.
The graph of every linear equation in two variables is a straight line.
X=0 is the equation of the y-axis and y=0 is the equation of the x-axis
The graph of x=a is a straight line parallel to the y-axis.
The graph of y=a is a straight line parallel to the x-axis.
An equation of the type y=mx represents a line passing through the origin.
Every point on the graph of a linear equation in two variables is a solution
of the linear equation.
Every solution of the linear equation is a point on the graph of the linear
equation.
21. Question Bank
• 1) Express the following linear equations in the form ax + by + c = 0 and
indicate the values of a, b, c in each case:
i) x = 3y
1x − 3y + 0 = 0
Comparing this equation with ax + by + c = 0,
a = 1, b = −3, c = 0
ii) 2x = −5y
2x + 5y + 0 = 0
Comparing this equation with ax + by + c = 0,
a = 2, b = 5, c = 0
iii) 3x + 2 = 0
3x + 0.y + 2 = 0
Comparing this equation with ax + by + c = 0,
a = 3, b = 0, c = 2
22. • 2) Write 4solutions for the following equation :
2x + y = 7
y in terms of x
For x = 0,
2(0) + y = 7
y = 7
Therefore, (0, 7) is a solution of this equation.
For x = 1,
2(1) + y = 7
y = 5
Therefore, (1, 5) is a solution of this equation.
For x = −1,
2(−1) + y = 7
y = 9
Therefore, (−1, 9) is a solution of this equation.
For x = 2,
2(2) + y = 7
y = 3
Therefore, (2, 3) is a solution of this equation.
23. 3) Find the value of k, if x = 2, y = 1 is a solution
of the equation 2x + 3y = k.
Putting x = 2 and y = 1 in the given equation,
2x + 3y = k
2(2) + 3(1) = k
4 + 3 = k
k = 7
Therefore, the value of k is 7.
•
24. 4) Draw the graph of the following linear
equations in two variables:
i) x + y = 4
y in terms of x
y = 4 – x
If x = 0
y = 4
(0,4) is a solution.
If x = 4
y = 0
(4,0) is a solution.
ii) y = 3x
y in terms of x
y = 3x
If x = -1
y = -3
(-1,-3)is a solution.
If x = 1
y = 3
(1,3) is a solution.
x 0 4
y 4 0
x -1 1
y -3 3