In the game of roulette in the united states a wheel has 38 slots: 18 slots are black, 18 slots are red, and 2 slots are green. we watched a friend play roulette for two hours. in that time we noted that the wheel was spun 50 times and that out of those 50 spins black came up 22 times. based on this data, the p(black)=0.44. this is an example of what type of probability. observational, subjective, classical, empirical

This is an example of Empirical probability.

Step-by-step explanation:

The wheel was spun 50 times and that out of those 50 spins black came up 22 times. based on this data, the P(black)=0.44.  

This is an example of empirical probability.

The empirical probability of an outcome is obtained by dividing the frequency of occurrence of an event by the number of trials of the experiment.

a and c

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x