Market equilibrium: a) all trades that can generate gains from trade take place, and no trades take place that would not generate gains from trade.
b) all trades that generate gains from trade greater than the price take place, and no trades that generate gains from trade less than the price are produced.
c) all units that sellers could possibly produce

a) all trades that can generate gains from trade take place, and no trades take place that would not generate gains from trade.

Explanation:

When we draw the demand and supply curve, the point in the curve where both meet shows that the market is in a state of equilibrium.

The price is the equilibrium price and the quantity is the equilibrium quantity. Prices would become stable at this point. At this point every trade that would bring about gains from trade would take place. There would be no trade in the market equilibrium that would not generate gains from trade. This is because the market equilibrium is an optimum point for trade for either party, that is the buyer and the seller.

wheres the chart? so i can answer.

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"