The probability that a city bus is ready for service when needed is 84%. the probability that a city bus is ready for service and has a working radio is 67%. find the probability that a bus chosen at random has a working radio given that is it ready for service. 17.0% 79.8% 83.8% 12.5%

Simonne used the following steps to simplify the given expression. 12-3(-2x+4) step 1: 12+(-)+(-3)(4) step 2: 12+6x+(-12) step 3: 12+(-12)+6x step 4: 0+6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? •identity property of addition •inverse property of addition •associative property of addition •commutative property of addition