A used-car dealership buys a car for $2800 and then sells it for $4300. What is the percent increase?

The increase is 53,57%.

Step-by-step explanation:

This problem is solved by the rule of 3. It's necessary verify the proportionality. On the both sides it's directly propose, so it's necessary multiply crossed:

2800 > 100%

4300 > x

2800 * x = 4300 * 100

x = (4300 * 100)/2800

x = 153,57%

153,57% - 100% = 53,57%, that's the answer

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.

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step-by-step explanation: