Roberto is saving up for a new computer. The graph shows the amount of money that Roberto has left to save before he has enough to purchase the computer. Which sentence is true?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Ineed to know the answer right now! !

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)