Answer:
b
Step-by-step explanation:
the y axis is the axis going up and down, so the reflection would be on the other side of the axis.
Answer:
Step-by-step explanation:
Do you mean checking your work? In that case it would be 9*20.
All you have to do here is find the lcm.
the time it will take them too complete the lap at the same time is 12 minutes.
You know that 2 lines are perpendicular when the fulfil
m1*m2 = -1
from D.)
m1 = -3/2
m2 = 2/3
so
m1*m2 = -3/2*2/3 = -1
this conclude that they are perpendicular each other