exam Maths Puzzle Numerical Ability

A car is driven 280 miles. If it had gone 5 mph faster, it could have made the trip in 1 hr less time. what was the speed?

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exam Other Question

Find the horizontal aymptote of the rational function f(x)=(8x-12)/(4x-2) Determine whether the graph of 2 equations are perpendicular.

y=3X-7
4Y=3-x