3v - 18. I hope this helped
<h3>
Hello!</h3>

In order to find the vertex of a parabola, we use the following formula:

Remember, a parabola looks like so:

Now we know what a and b stand for.
In this case, b is -4, and a is -1:

Simplify:

Divide:


<h3>Notes:</h3>
- Hope everything is clear.
- Let me know if you have any questions!
- Enjoy your day!
- Always remember: Knowledge is power!
<h3>Answered by:</h3>

Answer:
<h2>Hope it helps you......</h2>
Answer:
a.) .0469
b.) .9961
c.) .9492
Rounded these check below for full answers
Step-by-step explanation:
a.)

b.)
Porbability of at most 3 successes is equal to 1-p(4)
p(4)=

1-.003690625=.99609375
c.)
two or more failures is equa lto
p(0)+p(1)+p(2)=

Answer:I can’t see the rest.
Step-by-step explanation: