👆🏼Dasha, Masha and Sasha share money in the ratio 2:3:5. Sasha receives £75. How much does Masha receive?

👇🏼Solve

🖐🏼Simplify

👈🏼y varies directly with the cube of x. When y = 108, x = 3.

Express y in terms of x

👉🏼X, Y and Z have respective coordinates (2,9), (5,-3) and (6,k). XY is perpendicular to XZ.

Find k