The last one , because I will now solve it for you and prove therefore.
x²–4x+5=0;
D=(–4)²–4•5=16–20= –4= (2i)².
So:
x1= (4–2i)/2= 2–i
x2= (4+2i)2= 2+i.
This is the whole answer....
Three other u will solve by yourself and have roots which will not be suitable.
Answer:64%
Step-by-step explanation:
-9.1 < d - 6.3
add 6.3 to both sides
-2.8 < d or d > -2.8
Yes it is ig .... hope helped
Answer: The expected value of purchasing a raffle ticket would be $0.3449.
Step-by-step explanation:
Since we have given that
Number of tickets = 5500
Number of flower arrangements = 20
Number of gift certificates = 20
So, Probability that wining $70 at flower arrangement = 
Probability that wining $25 at gift certificates = 
So, Expected value of purchasing a raffle ticket would be

Hence, the expected value of purchasing a raffle ticket would be $0.3449.