3 folders cost $2.91 which equation would help determine the cost of 2 folders

The answer is yes

Can someone me i’m confused. will give brainliest and a whole bunch of points

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

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)