The answer would be C
2x + 9 = 21
1. 2x = 12
2. x = 6
Answer:
1,900 i think is the answer pls dont sue me lol
Answer:
The answer to this question is within 2 stabdard deviations
Step-by-step explanation:
to get the score of 85 you got to add the deviation value to the mean whuch creates the deviation. do that multiple times and you get a multiple deviation
72+8=80+8 is 88
88 is greater than 85 so a test score of 85 is within 2 standard deviations of the mean
4.20 divided by 4.00= 1.05
turn decimal into percentage by times 100
1.05 times 100= 105%
