Le contains & marbles, blue marbles and a green marbles. If two marbles are drawn out of the boy what is the ever probability that both marbles drawn will be

Me because some of question i don’t understand

Three times the sum of a number and seven is negative thirty-six. what is the number?

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)