If the cost price of 5pens is equal to the selling price of 4 pens of the same kind, find the profit percentage.

This question awards 100 ! i really don’t want to fail i will also mark you !

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.