Answer:
BEC is 90 degrees
Step-by-step explanation:
Answer:
(-1,-2)
Step-by-step explanation:
Let's bring back to memory vertex formula for parabolas.

Where (h,k) is the vertex.
In 
The vertex is (-1,-2)
you do 77 divided by 14 you get 5.5 so the greatest number of teams is 5.
6/20 chance or simplified would be 3/10. Answer [D] is correct.
-- The person in the audience will either win tickets or not win tickets.
-- The probability of (either win tickets or not win tickets) is 100%.
-- (Probability of win tickets) plus (probability of not win tickets) = 100%.
-- If (probability of win tickets) is 15%, then the (probability of not win tickets)
is the other 85%.