(a) Make q the subject of the relation \(t = \sqrt{\frac{pq}{r} - r^{2}q}\). (b) If \(9^{(1 - x)} = 27^{y}\) and \(x - y = -1\frac{1}{2}\), find the value o...

(a) Make q the subject of the relation \(t = \sqrt{\frac{pq}{r} - r^{2}q}\).

(b) If \(9^{(1 - x)} = 27^{y}\) and \(x - y = -1\frac{1}{2}\), find the value of x and y.

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