I want to start off by saying that I probably already know the answer to this question from an exercise I didn't even think would exist in my course due to how ridiculously easy it is, but I am beyond sleepy right now and can't force it out of my brain. I'm pulling an all-nighter to finish up some work, and I can no longer think. I've gone mad. I'm aware this is a stupid question. So I'm given the formula d=0.0065v^2 + 0.75v a) (Some long useless info here) basically translates into find d when v is 50 What I did: d=0.0065(50^2) + 0.75(50) d=0.0065(2500) + 37.5 d=16.25 + 37.5 d=53.75 m (The unit is metres according to the question) That's right, right? I.. no longer have the power to check for myself. b) Find v when d is 100 metres 100=0.0065v^2 + 0.75v I uh, don't seem to remember what to do when there are different powers of a variable being added. Look I know this sounds ridiculous, but I need all the help I can get right now. I'm about to collapse. I'm gonna try to proceed: 100=v(0.0065v +0.75) 100/(0.0065v + 0.75) = v Wait what? No, I can't find v in terms of v.. Thanks in advance gyus edit: My bad. I'm aware this should've been in Ask GBAtemp but there would be no spaces between the lines and it all looks squished and uncomfortable to read, so yeah.