exam Maths Puzzle Numerical Ability

Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.

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exam Other Question

Evaluate the function at the specified value of the independent variable and simplify.

f(w)= w, w"squared"-2w, w"to the third power"-2w"squared", w"less than or equal to" -1, -1 I really dont get equations, can you help me?