exam Maths Puzzle Numerical Ability

Simplify, Subtract
3 {{{ sqrt (25x-4)}}} {{{sqrt (25x)}}}

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exam Other Question

At 9:30 a.m. Andrew left Exeter for Portsmouth, cycling at 12 mi/hr. At 10:00 a.m. Stacy left Portsmouth for Exeter, cycling at 16 mi/hr. The distance from Exeter to Portsmouth is 20 mi. Find the time when they met. Complete the ordered pair so that each is a solution for the given equation.

3x + 4y = 12 (0, ), ( ,3/4), (,0), (8/3, )