Answer:
(-3+5)(1)=-3+5
Step-by-step explanation:
The multiplicative identity is 1.
The multiplicative identity property days that, if you multiply a real number by 1, that result is the same real number.
This is demonstrated in option B of the given alternatives, where we have:

The multiplication by did not change b the value.
$7.08
59
Times
12
Equals
7.08
28 + vector b = -12
vector b = -40
vector b has magnitude 40 units in the negative y direction.