Which of the following is not a quadratic equation a) ax^2 + bx = 0 b) 3x^2=-4x-1 c) x^2=5 d) x^2+3x-2=x^2-2x

I believe the answer is C- x^2 =5 because a quadractic equation should be set like ax^2 +bx +c

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.