What is the solution set of x
2 answers:
Answer:
Choices D is the correct answer.
Step-by-step explanation:
We have given an equation.
We have to find solution of given equation.
Let
then,
Putting values in given equation, we have
y²-y+4 = 6
y²-y+4-6 = 0
y²-y-2 = 0
Applying factorization of above equation, we have
y²-2y+y-2 = 0
y(y-2)+1(y-2) = 0
(y-2)(y+1) = 0
Applying Zero-Product Property to above equation, we have
y-2 = 0 or y+1 = 0
y = 2 or y = -1
or
Taking cube on both sides of above equation, we have
x = (2)³ or x = (-1)³
x = 8 or x = -1 which are the answer.
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Answer:
Step-by-step explanation:
Suppose F represents the value that a room is unlocked.
Then, we can assume that the probability of unlocked homes is:
P(unlocked homes) = P(U)
P(unlocked homes) = 40%
P(unlocked homes) = 0.40
Also, let us represent the value of the locked room with G.
P(locked homes) = P(G)
P(locked homes) = (1 - 0.40)
P(locked homes) = 0.60
Let the probability of selecting a correct key be P(S)
It implies that for the agent to use 3 keys, we have a combination of possible ways for the set of keys.
Now; since only one will open the house, then:
P(select correct key) = P(S)
P(S) = 0.375
Finally, for the real estate agent to have access to specific homes supposing the agent select three master keys at random prior to the time he left his office, Then:
P(F ∪ (G∩S) = P(F) + P(G∩S)
P(F ∪ (G∩S) = P(F) + P(G) × P(S)
P(F ∪ (G∩S) = 0.40 + (0.60×0.375)
P(F ∪ (G∩S) = 0.40 + 0.225
P(F ∪ (G∩S) =0.625