Identify the property shown.
(-5.2 + (-8.4)) + (-2.8) = -(5.2 + 8.4) + (2.8)
a. associative property
b. commutative property
c. opposite of a sum property.

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.