Suppose that y varies inversely with x and y=6 when x=4

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

What is the product? a-3/15a × 5/a-3

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale