Arithmetic Functions

What is the common difference?

-18, -23, -28, -33, ...

• d = -5

• d = 5

• d = -3

• d = 3

Find a₇.

15, 20, 25, 30, 35, ...

• 25

• 35

• 40

• 45

If you have $75, how many full days can you rent the Karaoke machine?

• 0 days

• 1 day

• 2 days

• 3 days

A house painter charges $12 per hour for the first 40 hours he works, $18 for the ten hours after that, and $24 for all hours after that.

How much does he earn for a 70 hour week?

(you may use a calculator for this question)

• $1020

• $1140

• $840

• $960

How much does it cost to rent the Karaoke machine for 3 days?

• $50

• $100

• $150

• $175

Find the common difference: 29, 21, 13, 5, ...

• d = -10

• d = -9

• d = -8

• d = -7

The difference between two terms in an arithmetic sequence is called ___________________.

• Formula

• Common Ratio

• Common Difference

• Common Factor