Answer:
x= -3-sqr30/7
Step-by-step explanation:
X^2 + 8x + 7= 0
(X+7)(X+1)
X=-1,-7
Answer: 0.2
Step-by-step explanation:
Given: The commuting time on a particular train is uniformly distributed over the interval (42,52).
∴ The probability density function of X will be :-
Thus, the required probability :-

Hence, the probability that the commuting time will be less than 44 minutes= 0.2
Pretty sure it’s C That one makes the most sense to me please let me know if you get it right