The lines represented by the equation y-x=5 and 4y-4x=36

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

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)

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²