No of substes is given by 2^n where n is the no of elements.
Here, n = 3
Therefore, number of subsets = 2^3 = 8
Step-by-step explanation:

Interest = Principle(Rate)(Time)
$84.50 = P(0.0325)(4)
$84.50 = P(0.13)
$84.50/0.13 = P
P = 650
$650 was originally deposited.
Answer:
x = -17
Step-by-step explanation:
-42 + 3x = 60 + 9x
3x = 60 + 42 +9x
3x = 102 + 9x
-9x + 3x = 102
-6x = 102
x = -17