Which equation is modeled below? 1 negative x tile and 1 positive 1 tile = 2 x tiles and 3 positive 1 tiles Negative x + 1 = 2 x + 3 x + (negative 1) = 2 x + 3 x + (negative 1) = 3 x + 2 Negative 2 x = 2 x + 3

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

Which expression is not a polynomial?

Which of the following contains a variable?