Recent content by ETBunce

Sorry, I'm confused. Derivatives are used in calculus, right? The problem I am presented with is from a SAT practice test. According to my understanding, I shouldn't need to use calculus tools to solve any of the problems in the SAT. Should I go learn more about derivatives before trying to...

Looks like the ball's height increases by 100 feet over the course of 2.5 seconds. Where do I go from there?

Am am presented with the problem: $$ h(t) = c - (d - 4t)^2 $$ At time t = 0, a ball was thrown upward from an initial height of 6 feet. Until the ball hit the ground, its height, in feet, after $$t$$ seconds was given by the function $$h$$ above, in which $$c$$ and $$d$$ are positive constants...

I understand HallsofIvy's explanation, so I suppose my question is answered, however, I would like to wrap up this discussion with you. For the equation $(4k−8)x=m−8k$, it can't be possible that the two sides are the same for all values of $x$, right? Does this mean I simplified incorrectly?

What should I be trying to conclude from your equation? I don't know where to go from here. Is there a reason you subtracted $8k$ from both sides?

Not sure exactly what kind of problem I would call this, but I am faced with a strange practice problem in which I must solve for m. The correct answer is apparently 16, but I don't understand how this is true. I am usually left with: 4kx - 8x + 8k = m and I'm not sure how to simplify further...