How many centimeter cubes will fill a box 20cm by 6cm by 3cm

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

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2