Sam can wash 8 cars is in 1 hour. shelley can wash 6 cars in 1 hour. how much time does it take them to wash 70 cars if they work together?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

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)