Please help. The correct and best answer gets brainiest! 29 points!!
(please make sure you are correct and show your work, no guessing)

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)

Find the distance between the point (-3,-4), and (see the picture below)