Arithmetic Sequences # 3

•  $a_4\ =\ a_5\ +\ 10$  

•  $a_{4\ }=\ a_5\ +\ 22$  

•  $a_{5\ \ }=\ a_4\ +\ 10$  

•  $a_5=\ a_4\ +\ 22$  

• None of these

• $a_{5\ }=\ a_6\ +\ 9$

• $a_6\ =\ a_5\ +\ 18$

• $a_6\ =\ a_{5\ }+\ 9$

• $a_{5\ }=\ a_6\ +\ 18$

• None of these.

Which explicit formula matches this table?

• $a_n=75+25\left(n-1\right)$

• $a_n\ =\ 125-25\left(n-1\right)$

• $a_n=50\ -25\left(n-1\right)$

• $a_n\ =\ 125\ +25\left(n-1\right)$

•  $a_{n\ }=\ 125\ -25\left(1-n\right)$ 

Which explicit formula matches this table?

•  $a_n=84\ +\left(n-1\right)\left(16\right)$  

•  $a_n=84+\left(n-1\right)\left(-16\right)$  

•  $a_n=84-\left(n-1\right)\left(16\right)$  

•  $a_n=84-\left(n-1\right)\left(-16\right)$  

•  $a_n=84+\left(1-n\right)\left(16\right)$  

Heidy is collecting canned goods for a food drive. On the first day she collects 2 can. On the second day she collects 12 cans. On the third day she collects 22 cans. This pattern continues for each day.

How many cans will she have after 9 days?

• 72

• 102

• 82

• 92

• 112

What is the next term for the sequence:

2.94, 1.94, 0.94, -0.06, -1.06,...

• -0.94

• 0.06

• -2.06

• 2.06

• -3.06

• d = 5

• d = -15

• d = -11.67

• d = -70

• d = -18.75

Which term in this sequence is -407?

{-1, -15, -29, -43, -57,...}

• 28

• 29

• 30

• 31

• 32

What are the first 4 terms of the sequence?

• { 4, 40, 400, 4000, 40000, ...}

• { 4, -6, -16, -26, -36, ...}

• { 10, 14, 18, 22, 26, ...}

• { 4, 14, 24, 34, 44, ...}

• { 10, 6, 2, -2, -6, ...}

• -200

• -158

• -186

• 322

• -172