What is the definition of identity property of addition

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work

In a coastal town, the humidity, measured in grams of water per kilogram of air, increases by 43% for every 1 degree celsius increase in temperature. a scientist observes that the humidity on monday morning is 5.75 grams per kilogram. he wants to know how much the temperature must increase for the humidity to reach at least 49.17 grams per kilogram. let t represent the increase in temperature, in degrees celsius, from monday morning's observation. write an inequality to represent the situation, and use it to determine the desired temperature increase.

Acoin is tossed 4 times which of the following represents the probability of the coin landing on heads all 4 times