Something funny is that the x value of the vertex lies directl in the middle of the x intercepts
so
we see the x intercepts or 0's at x=8 and 2
the average is x=5
so find f(5) to find the y value of the vertex
f(5)=(5-8)(5-2)
f(5)=(-3)(3)
f(5)=-9
vertex is at (5,-9)
the actual way the teacher wants is to expand then compltete the square to get into the form f(x)=a(x-h)^2+k where the vertex is (h,k)
but whatever
verrtex is at (5,-9)
See attachment for math work and answer.
Step-by-step explanation:
use desmos it's a graphing calculator just put in the equation
Answer:
20-
Step-by-step explanation:
3 parts=30 cards thus 2 parts: 20
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➷ speed = distance / time
Rearrange this for time
time = distance/speed
time = 190/40
time = 4.75hrs
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