His mistake was adding 12+2 when he was supposed to subtract.
(-1.0) (-4,-1) (-1,-5) hopefully this helps (x,y)
Dy/dx = (dy/dt) / (dx/dt)
dy/dt = 2bt
dx/dt = 3at^2
therefore dy/dx = 2bt/3at^2
dy/dx = 2b/3at
yes i agree because if all the integers are positive, the answer stays positive which means if you know your integer rules: a positive divide by a positive it stays positive. its the same thing for all the other operations. hope this helps.
Jeff can travel 2 miles in one hour
