If a figure has -number of congruent angles, and the sum of the angle measures is 1800 degrees, how many sides does the figure have? a - 8 sides
b- 18 sides
c - 10 sides
d- 12 sides

Which statement describes surface features called maria on the moon

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)

Using elimination, what is -4x+2y=-12 4x+8y=-24