If $$ {\sqrt{2x+9}+x=13}$$ then find the value of x?

Find co-ordinates of the midpoint of the segment joining points C (3, -5) and D ( -7,3) 

The length, width and height of a cuboid are 18 cm, 24 cm, and 4 cm, respectively. The volume of the cube is equal to the volume of the given cuboid. The arm of the cube is:

In ΔABC, AB = AC and ∠B = 40 °, find the value of ∠A.

There is 10% loss if an article is sold at Rs. 270. Then the cost price of the article is

A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. If A, B and C work together, they will complete the work in 

The figure below is an equilateral triangle with sides of length 6. What is the area of the triangle?

If (a+b) : (b+c) : (c+a) = 7 :6 : 5 and (a+b+c)=27, then what will be the value of $$ {1\over b}:{1\over a}:{1\over c}$$.