The vertices of a triangle are (11,9), (7,4),
and (1, 11). What are the vertices after the
triangle has been reflected over the y-axis?
A (9, 11), (4,7), (11,1)
B (11, -9), (7, –4), (1, -11)
© (9, 11), (4,7), (11,1)
D (-11,9), (-7,4), (-1,11)

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

47 - 90 = 43

43 - 180 = x

x = 137