There are simultaneous changes in the demand for and supply of tablet devices, with the consequences being an unambiguous decrease in the equilibrium quantity of these devices but no change in the market-clearing price. What changes in the demand for and supply of tablet devices could have generated these outcomes?

demand decreased and supply increased

Explanation: A demand decrease leads to a decrease in equilibrium quantity and a decrease in equilibrium price while a supply increase leads to a rise in equilibrium quantity and a decrease in equilibrium price.

add the answer choices and i'll give you the answer

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.