Algebra Test - ...

The weight of Rahul is $$5\ kg$$ more than Sachin .The weight  of Samir is $$12\ kg$$ less than double the weight of Sachin .If the total weight of all the three is $$93$$ form the equation

Which of the following represents the given statement?
The sum of a and b is multiplied by taking away $$5$$ from their sum. 

Which of the following represents the statement given below?
The product of $$a$$ and $$b$$ is added to their sum.

Which of the following represents the statement given below?
$$9$$ less than $$x$$?

____ represents the following statement.
The product of $$x$$ and $$y$$ is decreased by $$4$$.

_____ represents the following statement. 
$$5$$ more than twice a number $$x$$

If each matchbox contains $$48$$ matchsticks, then the number of matchsticks required to fill $$n$$ such boxes is 

The length of a side of square is given as $$2x+3$$. Which expression represents the perimeter of the square.

Arpita's present age is thrice of Shilpa. If Shilpa's age three years ago was $$x$$. Then Arpita's present age is