👉🏼Solve

👈🏼y is proportional to √x. If x is decreased by 9.75%, what is the percentage decrease in y.

🖐🏼f(x) = 10 – 5x and g(x) = ⅓x -1. Solve f^{-1}(x) = g^{-1}(x)

👆🏼A block of ice loses 10% of its volume each minute. What percentage will be left after 5 minutes?

👇🏼(x+3)(x+a)(bx-3) is expanded to give 2x^{3}-x^{2}-15x +18. Find a and b.