Name the property the equation illustrates.

7 + (4 + 4) = (7 + 4) + 4

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)

Landon wrote that 3−2.6=4. which statement about his answer is true?

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re