i think it is salary received from employer is taxable???

ABCD is a parallelogram if the coordinate of A B C D are 2,3 1,4 and o,-2 find the coordinate of D

pls send the answers

Solve for x and y
5/x+1/y=2
6/x-3/y=1

x and y not equal to zero

physics

prove a+b2

=a2+2ab=b2

if a and b are unit vectors then what is the angle between a and b for a-2b to be unit vector 

There is no some easy method to understand 

how many terms of gp 3,3^2,3^3............are needed to give the sum 120

the sum of the first terms of a gp is 315 whose first term and common ratio are 5 and 2 .find the last term and the number of terms 

iquestion 15&16

The sum of first 3 terms of a GP is to the first six terms is 125:152. Find the common ratio

How to calculate salary of workers in hourly on daily basis one days is hours extra is o T pls give me the suggestion.