The vertices of triangle ABC are A (1,1), B (1,5) and C (7,1). If triangle ABC is reflected across the x-axis to
create triangle A'B'C', what would be the new coordinates
for the vertices of the new triangle?
A A' (1,-1), B' (5, -1), C'(-1, – 7)
B A' (1, -1), B' (-1, –5), C' (-7, -1)
© A (-1,1), B' (–1,5), C' (-7,1)
DA' (1, -1), B' (1, -5), C' (7,-1)

Is awnser D the correct awnser help?

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)

This is about circle theorems. someone asap : (

Which is the focus of a parabola with equation y2=4x