Identify the pattern in each sequence and determine the next three elements. Show your work and state the rule.

The pattern is adding 0.25 to the previous term.
The next three elements are:
$0.75 + 0.25 = 1.00$
$1.00 + 0.25 = 1.25$
$1.25 + 0.25 = 1.50$
Rule: Add 0.25. Next three elements: $\boxed{\text{1.00, 1.25, 1.50}}$

The pattern is adding 2.50 to the previous term.
The next three elements are:
$7.50 + 2.50 = 10.00$
$10.00 + 2.50 = 12.50$
$12.50 + 2.50 = 15.00$
Rule: Add 2.50. Next three elements: $\boxed{\text{10.00, 12.50, 15.00}}$

The pattern is adding 0.3 to the previous term.
The next three elements are:
$0.9 + 0.3 = 1.2$
$1.2 + 0.3 = 1.5$
$1.5 + 0.3 = 1.8$
Rule: Add 0.3. Next three elements: $\boxed{\text{1.2, 1.5, 1.8}}$

The pattern is adding 0.15 to the previous term.
The next three elements are:
$0.45 + 0.15 = 0.60$
$0.60 + 0.15 = 0.75$
$0.75 + 0.15 = 0.90$
Rule: Add 0.15. Next three elements: $\boxed{\text{0.60, 0.75, 0.90}}$

The pattern is adding 0.4 to the previous term.
The next three elements are:
$1.2 + 0.4 = 1.6$
$1.6 + 0.4 = 2.0$
$2.0 + 0.4 = 2.4$
Rule: Add 0.4. Next three elements: $\boxed{\text{1.6, 2.0, 2.4}}$

The pattern is adding 0.65 to the previous term.
The next three elements are:
$1.95 + 0.65 = 2.60$
$2.60 + 0.65 = 3.25$
$3.25 + 0.65 = 3.90$
Rule: Add 0.65. Next three elements: $\boxed{\text{2.60, 3.25, 3.90}}$

The pattern is adding 0.2 to the previous term.
The next three elements are:
$0.6 + 0.2 = 0.8$
$0.8 + 0.2 = 1.0$
$1.0 + 0.2 = 1.2$
Rule: Add 0.2. Next three elements: $\boxed{\text{0.8, 1.0, 1.2}}$

The pattern is adding 2.5 to the previous term.
The next three elements are:
$7.5 + 2.5 = 10.0$
$10.0 + 2.5 = 12.5$
$12.5 + 2.5 = 15.0$
Rule: Add 2.5. Next three elements: $\boxed{\text{10.0, 12.5, 15.0}}$

The pattern is adding 0.35 to the previous term.
The next three elements are:
$1.05 + 0.35 = 1.40$
$1.40 + 0.35 = 1.75$
$1.75 + 0.35 = 2.10$
Rule: Add 0.35. Next three elements: $\boxed{\text{1.40, 1.75, 2.10}}$

The pattern is adding 5.5 to the previous term.
The next three elements are:
$16.5 + 5.5 = 22.0$
$22.0 + 5.5 = 27.5$
$27.5 + 5.5 = 33.0$
Rule: Add 5.5. Next three elements: $\boxed{\text{22.0, 27.5, 33.0}}$