The x terms add up to 4x and the numbers add up to 12
4x + 12 = 4(x + 3)
Its C
Answer:
y=1/3, x=4/9
y=8, 32/3
x=9, y=27/4
y=20, x=80/3
Step-by-step explanation:
Answer: in 95% of races, his finishing time will be between 62 and 64 seconds.
Step-by-step explanation:
The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean . The empirical rule is further illustrated below
68% of data falls within the first standard deviation from the mean.
95% fall within two standard deviations.
99.7% fall within three standard deviations.
From the information given, the mean is 63 seconds and the standard deviation is 5 seconds.
2 standard deviations = 2 × 0.5 = 1
63 - 1 = 62 seconds
63 + 1 = 64 seconds
Therefore, in 95% of races, his finishing time will be between 62 and 64 seconds.
No because ten days from may 5th would be the 15th and then the next 10 days would be the 25
