Can someone please help.

Step-by-step explanation:

Vectors are parallel if they point in the same or opposite directions.  In other words, they have the same slope.

Part A.

m₁ = 1 / √3

m₂ = -1 / -√3 = 1 / √3

The vectors are parallel.

Part B.

m₁ = 3 / 2

m₂ = -2 / -3 = 2 / 3

The vectors are not parallel.

Commutative Property  

Associative property

Additive inverse  

Identity property

Step-by-step explanation:

In a  commutative property multiplication and addition which posses commutative property takes place without considering the order of arrangement of data

12.2 + 18.6 + –4.3 + (–18.6)

12.2 + –4.3 + 18.6 + (–18.6)

The second step results into the presence of a commutative property.

The next step 12.2 + –4.3 + [18.6 + (–18.6)] is an associative property because here, re-grouping of numbers which gives the same result takes place

[18.6 + (–18.6)] is an additive inverse since the result is zero. Additive inverse occurs when the addition of a number to another number results into zero

12.2 + –4.3 + (0)   is an Identity property

Identity property occurs when the addition of any number with zero eventually resulted into that number.