Answer:
, 
Step-by-step explanation:
The velocity function of the projectile is obtained by deriving the position function:

Now, the velocities after 3 and 15 seconds are, respectively:




Answer:
x+2y=0
Step-by-step explanation:
Answer:
bottom left
Step-by-step explanation:
line of symmetry means that both sides will look the same if a line is drawn thru
Add 6 to both sides
2m2+7m+6=0