Recently I viewed a blog post about SAT Math preparation. It stated that quadratics is the chapter which is most asked in SAT, and if I don't master the chapter, I can't answer most SAT problems. IMO, this statement above implied that quadratics (quadratic equation) is the core chapter...
Sample Problem 2.04 Drag race of car and motorcycle
I was following all the way up to using the quadratic equation for this problem...(please see img for a more detailed attempt at a solution.)
So I may have simplified incorrectly here:
but I came up with