6. John is a lamp salesman. He earned commissions of $24, $28, $21, and $30 on the lamps he has sold this
week. If he sells one more this week, how much com-
mission must he earn to average $25 in commissions on
lamps sold this week?

What is the average?

What is the pattern in the values as the exponents increase?

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

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