Answer this plz I’ll mark brainliest:)

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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)