Answer:
B: 6.0
Step-by-step explanation:
-3t^2+9t+54 = 0
This is the equation that needs to be solved
Divide both sides by -3
t^2 - 3t - 18 = 0
The factors of 18 are: (1 18) (2 9) (3 6)
3 - 6 = -3 and 3 x -6 = -18
So: (t + 3) (t - 6) = 0
t = -3, 6
It can't be negative so the answer is 6
Answer:

Step-by-step explanation:

Answer:
h=-3
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
-7=(-10-h)/(7-6)
-7=(-10-h)/1
-7*1=-10-h
-7=-10-h
h=-10-(-7)
h=-10+7
h=-3