Identify the directrix, focus, and vertex of the parabola in the figure. Match the correct coordinates or equation with the correct part of the parabola. Direct:
(−3,3)
(0,4)
x=4
y=4
(−3,2)
(1,−1)
Focus:
(−3,3)
(0,4)
x=4
y=4
(−3,2)
Vertex:
(−3,3)
(0,4)
x=4
y=4
(−3,2)

Use the four functions below for this question. compare and contrast these four functions using complete sentences focus on the slope and y- intercept first, and then on any additional properties of each function

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)

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0