Answer:
The third one
Step-by-step explanation:
The x value repeats.
Answer:
6 13/16
Step-by-step explanation:
Make it a fraction for it to be easier to solve.
11/4 + 65/16
The LCM is 16
44/16+65/16
109/16
6 13/16
Answer:
25
Step-by-step explanation:
6x + 30 = 180
6x = 150
x = 25
The answer to this is B (8%) I found that by working through all the answer options. Hope this helps
To answer this question, first calculate the z-score:
test score - mean score 65 - 70
z = ----------------------------------- = ------------------- = -5/10 = -0.5
std. dev. 10
We need to determine the area under the normal curve to the left of z = -0.5.
Refer to a table of z-scores, and look for z=-0.5. What area appears in connection with this z-score? It's less than 0.5000.
Using my TI-83 Plus calculator (specifically, its "normalcdf( " function, I found that the area under the std. normal curve to the left of z = -0.5 is 0.309.
Thus, the percentile is 30.9, or roughly 31 (31st percentile).
Roughly 31% of students earned a grade lower than 65, and roughly 69% earned a higher grade.