Answer:
Step-by-step explanation:
4x+2y = -24 -------------(i)
<u> -4x+y = 12 -</u>------------(ii)
add (i) &(ii) 3y = -12
y = -12/3
y = -4
Put y = (-4) in (i)
4x + 2*(-4) = -24
4x - 8 = -24
4x = -24 + 8
4x = -16
x = -16/4
x = -4
A and B are complementary, so A+B. = 90, 3x-8+5x+10=90
8x=88, x= 11
A= 3*11-8=25
B=5x+10=65
Answer:
a. 0.0783
Step-by-step explanation:
We have these following probabilities:
A 15% probability that a flight is delayed
An 85% probability that a flight is on time
Which of the following is closest to the probability that it will take 5 selections to find one flight that is delayed?
We want the first four flights to be on time. Each flight has an 85% probability of being on time.We want the fifth flight to be late.
Each flight has a 15% probability of being late.
So
0.85*0.85*0.85*0.85*0.15 = 0.0783
So the correct answer is:
a. 0.0783
