Classify the triangle by its angles and sides

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4