To help you with this topic, I would suggest you revise probability trees.
P(train arriving) = 0.8
P(train arriving on time) = 0.84
P(train arriving late) = 0.86
0.8 x 0.86 = 0.688
Answer: 0.688
Hope it helped :)
Which one is it on that page
C² = a² + b²
c² = 40² + 40²
c² = 1600 +1600
c² = 3200
√c²=√3200
c = 56.56854249
Answer:
(-2, 3) is one of many solutions to the system
Step-by-step explanation:
Let's actually solve the system so that we can compare the result with the given pair (-2, 3):
Multiplying the second equation by -2 results in:
2x + 4y = 8
-2x - 4y = -8
We see that these equations are identical. Thus, there are infinitely many solutions.
1. is true: (-2, 3) is one of many solutions to the system
The other three possible answers are incorrect.
Answer:
3.75 hours
Step-by-step explanation:
The receptionist takes n hours to do 1 day's worth of work.
The assistant takes 4n hours to the 1 day's worth of work.
In 1 hour, the receptionist does 1/n amount of work.
In 1 hour, the assistant does 1/(4n) amount of work.
Working together, in 1 hour, they do this amount of work:
1/n + 1/(4n)
Working together, the 2 workers do the job in 3 hours.
Working together, in 1 hour, they do this amount of work:
1/3
1/n + 1/(4n) = 1/3
Multiply both sides of the equation by the LCD, 12n.
12 + 3 = 4n
4n = 15
n = 15/4
n = 3.75
Answer: 3.75 hours
