368 books are available wednesday
823-312=511
511+129=640
640-272=368
Smaller, since a half equals to 0.50
Tommy’s class rank dropped 10 %
Answer:

First tangent line:

Second tangent line:

Notice: slope of -1 means that both
are equal to -1, so 
Answer:
The probability that a coin flip is a head or a tail is 0.5. The probability that a coin flip is either a head or a tail is 1. The probability that a three-coin-flip is two heads and a head or a tail is 0.25.
Step-by-step explanation: