The interior angle of a regular polygon is 168º. Find the number of sides of the polygon.
If 3x - 2y = - 5 and x + 2y = 9, find the value of \(\frac{x - y}{x + y}\)
A variable W varies partly as M and Partly inversely as P. Which of the following correctly represents the relation with k\(_1\) and k\(_2\) constants?
A cylindrical metallic barrel of height 2.5m and radius 0.245 is closed at one end. Find, correct to one decimal place, the total surface area of the barrel (Take π = \(\frac{22}{7}\))
Make R the subject of the relation V = πl(R\(^2\) - r\(^2\))
