Please help me. i’ve been stuck on this test for 3 days and i need to get at least a 70% to pass

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

What is the square root of 45? (step by step working plz)

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8