Answer:
The answer is 15.
Step-by-step explanation:
10% of 150 is 15. (you can take away the zero)
Answer: The probability is about 0.2%.
The probability of flipping heads one time is 0.5, 50% or 1/2.
To flip heads 9 times in a row, we have to multiply 1/2 by itself 9 times.
(1/2)^9 = 1/512 or about 0.2%
It should only happen once every 512 times.
Answer:
Andy gets 7 questions wrong.
Step-by-step explanation:
Let A, B, C and D be the number of questions answered wrong by Andy, Beth, Charlie, and Daniel, respectively.
Andy and Beth together get the same number of questions wrong as Charlie and Daniel together:

Andy and Daniel together get four more questions wrong than Beth and Charlie do together:

Charlie gets five questions wrong:

Solving the linear system:

Andy gets 7 questions wrong.
Answer:
4 miles per hour
Step-by-step explanation: