Answer:
True
Step-by-step explanation:
Since a penny has head and tails, each has 1/2 chance to land on heads or tales, so 14*1/2=7, so true.
Answer:
A(r)=15-3r
Step-by-step explanation:
switch the sign of +3r to make it -3r
Answer:
graph?
Step-by-step explanation:
Answer:
C 
Step-by-step explanation:
Consider the series

The nth term of series is 
The bottom index tells you that n starts changing from 3, so

Thus, the sum of all terms is

Answer:
b=9
(assuming you meant -6x) x = -2
h = -4
a = 6
Step-by-step explanation: