Arithmetic/Geometric sequences

What are the next 3 terms in this sequence of terms?     3, 7, 11, 15

• 18, 22, 26
• 19, 21, 23
• 19, 23, 27
• 18, 21, 24

What is the distance from one number to the next in a sequence of numbers that is represented by a (d) in an arithmetic sequence?

• Common denominator
• Common opposites
• Common domain
• Common difference

Find the 16th term.

• 16

• 31

• 25

• 35

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2
• 1/2
• -14
• -7

Find the next three terms: 4, 12, 36, 108, ...

• 324, 972, 2916
• 972, 2916, 8748
• 405, 1215, 3645

Is this sequence arithmetic, geometric, or neither?
1,2,4,7,11,16,22,...

• arithmetic
• geometric
• neither
• none of the above

Write the explicit formula for the sequence.

9, 5, 1, -3, ...

• $a_n=9+5\left(n-1\right)$

• $a_n=9-4\left(n-1\right)$

• $a_n=4+9\left(n-1\right)$

• $a_n=9\cdot4^{\left(n-1\right)}$

Write the explicit formula for the sequence.

216, 72, 24, 8, ...

• $a_n=216\cdot\left(\frac{1}{3}\right)^{\left(n-1\right)}$

• $a_n=8\cdot3^{\left(n-1\right)}$

• $a_n=216-144\left(n-1\right)$

• $a_n=216\cdot3^{\left(n-1\right)}$

Write the explicit formula for the sequence.

15, 22, 29, 36, 43, ...

• $a_n=15+22\left(n-1\right)$

• $a_n=15\cdot7^{\left(n-1\right)}$

• $a_n=15+7\left(n-1\right)$

• $a_n=29-14^{\left(n-1\right)}$

Write the explicit formula for the sequence.

7, 28, 112, 448, ...

• $a_n=7+4\left(n-1\right)$

• $a_n=7\cdot4^{\left(n-1\right)}$

• $a_n=\frac{448}{4n}$

• $a_n=28+84\left(n-1\right)$