Show that the ratios 10/20 and 30/60 from a proportion by finding a common multiplayer. show that the ratios are equal by writing them in simplest form.

Find the area of a parallelogram with base 15 yards and height 21 2/3

Factor the expression using gcf 9b+45

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)