exam Maths Puzzle Numerical Ability

y=x/5-4 What does x equal?

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exam Other Question

A bridge is built in the shape of a parabolic arch. The bridge has a span of 120 feet and a maximum height of 25 feet. Choose a suitable rectangular coordinate system and find the height of the arch at distances of 10, 30 and 50 feet from the center. 4x-6>14