1. **Stating the problem:** Rearrange the formula $$W = \frac{h^2}{7x}$$ to make (a) $$h$$ the subject and (b) $$x$$ the subject. 2. **Rearranging for h:** - Start with $$W = \frac{h^2}{7x}$$. - Multiply both sides by $$7x$$ to isolate $$h^2$$: $$7xW = h^2$$. - Take the square root of both sides to solve for $$h$$: $$h = \pm \sqrt{7xW}$$. 3. **Rearranging for x:** - Start again with $$W = \frac{h^2}{7x}$$. - Multiply both sides by $$7x$$: $$7xW = h^2$$. - Divide both sides by $$7W$$ to isolate $$x$$: $$x = \frac{h^2}{7W}$$. **Final answers:** - (a) $$h = \pm \sqrt{7xW}$$ - (b) $$x = \frac{h^2}{7W}$$