What is the transformation of g(x)=(-1/2x)

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be