Algebra Exercise 5

Problem: Write the expression for s is f = n / s2   Answer: First, multiply both sides by s2: f X s2 = s2 X n / s2 f X s2 = n. Now divide both sides by f: f X s2 / f = n / f. s2 = n / f and s = square root (n / f)   Solve the expression you derived numerically for f =7 and n=63. s = square root (n / f) = square root (63 / 7) = square root (9) = 3.   Back to Algebra

Updated 8/16/99 By James E. Heath        Copyright Ó 1999 Austin Community College