Dodecahedron has 20 vertices. How many edges does it have?

At 24% discount the selling price of a washing machine is Rs 38000, what is the selling price if the discount is 40%?

What is the slope of the line parallel to the line passing through the points (4,-2) and (-3,5)?

The co-ordinates of the centroid of a triangle ABC are (-1,-2) what are the co-ordinates of vertex C, if co-ordinates of A and B are (6,-4) and (-2,2) respectively?

If 3x + 2y = 7 and 4x - y = 24, then x - y = ______.

When a discount of 25% is given on a wedding gown, the profit is 32%. If the discount is 17%, then the profit is _____%.

If 3x - 4 > 2 - x/3 and 3x + 5 > 4x - 5; then find the value of x?

Two students appeared for an examination. One of them secured 24 marks more than the other and his marks were 65% of the sum of their marks. The marks obtained by them are _____