EASY
Earn 100

The coach of a cricket team of M.K.Nagar High School buys 3 bats and 6 balls for 3900Later he buys one more bat and 3 balls for 1300. Find the cost of each bat and ball.

Important Questions on Two Dimensional Graph

MEDIUM
Two sides of a parallelogram are along the lines, x+y=3 and x-y+3=0. If its diagonals intersect at 2,4, then one of its vertex is:
MEDIUM
Two vertices of a triangle are 0,2 and 4,3. If its orthocenter is at the origin, then its third vertex lies in which quadrant?
EASY
The equation of the line passing through a,b and parallel to the line xa+yb=1 is
MEDIUM
If a, b are positive real numbers such that the lines ax+9y=5 and 4x+by=3 are parallel, then the least possible value of a+b is
HARD
The tangent to the curve y=x2-5x+5, parallel to the line 2y=4x+1, also passes through the point :
MEDIUM
The point on the line  4x-y-2=0  which is equidistant from the points -5, 6 and 3, 2 is-
EASY
Distance between two parallel lines y=2x+4 and y=2x-1 is
HARD
A ray of light is incident along a line which meets another line 7x-y+1=0 at the point 0,1. The ray is then reflected from this point along the line y+2x=1. Then the equation of the line of incidence of the ray of light is :
HARD
A straight line L through the point (3, -2) is inclined at an angle of 60° to the line 3x+y=1. If L also intersects the X-axis, then the equation of L is:
HARD
Let L be the line passing through the point P1,2 such that its intercepted segment between the co-ordinate axes is bisected at P. If L1 is the line perpendicular to L and passing through the point -2, 1, then the point of intersection of L and L1 is
HARD
The line which is parallel to x-axis and crosses the curve y=x at an angle 45°, is
MEDIUM

The number of values of k, for which the system of equations :

k+1x+8y=4k

kx+k+3y=3k-1

has no solution, is :
HARD
Given three points P,Q,R with P5,3 and R lies on the x-axis. If the equation of RQ is x-2y=2 and PQ is parallel to the x-axis, then the centroid of ΔPQR lies on the line 
HARD

For a>b>c>0, the distance between (1,1) and the point of intersection of the lines ax+by+c=0 and bx+ay+c=0 is less than 2 2 . Then

HARD
If a line L is perpendicular to the line 5x-y=1, and the area of the triangle formed by the line L and the coordinate axes is 5 sq units, then the distance of the line L from the line x+5y=0 is 
MEDIUM
Slope of a line passing through P(2, 3) and intersecting the line x+y=7 at a distance of 4 units from P, is
HARD
The point 2,1 is translated parallel to the line L:x-y=4 by 23 units. If the new point Q lies in the third quadrant, then the equation of the line passing through Q and perpendicular to L is
MEDIUM
Let a, b, c and d be non-zero numbers. If the point of intersection of the lines 4ax+2ay+c=0 & 5bx+2by+d=0 lies in the fourth quadrant and is equidistant from the two axes then 
MEDIUM
A ray of light along x+3y=3 gets reflected upon reaching X-axis, the equation of the reflected ray is
HARD
If the straight line 2x-3y+17=0 is perpendicular to the line passing through the points 7,17 and 15, β, then β equals :