Luciana claims that if you add numbers with the same sign, the sum is always greater than each of the add ends. is she correct?

Yes

Step-by-step explanation:

If you add two positive numbers, the sum will always be greater.

Ex: 5+5=10

If you add two negatives, the sum will always be greater.

Ex: -5+-5=10

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150