Assignment-Polynomials (Class9)

Class9 Assignment

Problems based on graph

Q1. Draw the graph of 2x+y=6 and 2x-y+2=0. Shade the region bounded by these lines and x-axis. Find the area of the shaded region.
Q2. Solve the following equations graphically: 2x+3y=12; x-y=1
(i) Shade the region between the two lines and x-axis.
(ii) Shade the area bounded by these lines and the y-axis.
(iii) Find the coordinates of the vertices of the triangle formed by the two straight lines and the y-axis.
Q3. Solve the following system of linear equations graphically x-y=1; 2x+y=8 Shade the area bounded by these two lines and the y-axis.
Q4. Solve the following system of linear equations graphically: 2x-3y=1; 3x-4y=1. Does the point (3,2) lies on any of the line?
Q.5 Solve the following system of linear equations graphically: 4x – 5y – 20 =0 ;
3x + 5y –15 = 0 Determine the vertices of the triangle formed by the lines, representing the above equations, and the y-axis.
Q6. Draw the graphs of the equations 2x + y =6 and 2x – y + 2 =0.
a)Determine the vertices of the triangle formed by the lines, representing the above equations, and the x-axis.
b)Shade the region bounded by these lines and x-axis.
c)Find the area of the shaded region.
Q7.Solve graphically the system of linear equations 5x – 6y + 30 = 0,
5x + 4y – 20 = 0. Find the area of the regions bounded by these lines and the x-axis.
Q8.Draw the graphs of the equations: 3x + y – 11 = 0, x – y – 1 = 0 .Find the vertices of triangle formed by the above two lines and x = 0.
Q9. Draw the graphs of the following equations: 4x+3y=24 2x-y-2=0
(i) Find the coordinates of the points where the lines meet the x-axis.
(ii) Find the area of the region bounded by these lines and x-axis.
(iii) Find the area of the region bounded by these lines and y-axis.
Q10. Observe the graph representing pair of linear equations in two variables.
x+y=3 and x-3y=6 given below and answer the following questions:



1)Find the coordinates of the point where line meets x-axis and y-axis.
2)Shade the region bounded by above lines and y-axis
3) Find the vertices of triangle formed by the above two lines and x = 0.
4) Find the area of the region bounded by these lines and y-axis

Pair of linear Equations in two variables

Assignment

1.Write the condition that the pair of linear equations in two variables ax+by+c=0, lx+my+n=0 are inconsistent.

2. Given the linear equation 3y+2x-9=0, write another linear equation in two variables s.t the geometrical representation of the pair so formed is :

1) intersecting lines

2) parallel lines

3. Does the point(2,-2) lie on the line whose equation is 7x-y-8=0?

4. Write a linear equation in two variables which is consistent to equation 3(x-y)=2.

5. Find the co-ordinates of the point where the line 2x-3y=6 meets x-axis .

6. Find the co-ordinates of the point where the line 5x+10y=10 meets y-axis.

7. How many solutions of the equation 5x-2y+10=0 are possible?

8. Obtain a condition for the following system of equations to have a unique solution ax + by = c lx + my = n

9. The system of equations 3x – 5y = 20 and 6x – 10 y = 40 is _____________(consistent/inconsistent).

10. Find the value of ‘k’ for which the system of equations 3x+2y-4=0 and kx-y-3=0 will represent intersecting lines?