Remove parentheses:
-4 - 6i + 3i - 8 + i
Combine common terms
-12 -2i
Answer:
70.06
Mean score = 70
Step-by-step explanation:
16% of students scored higher than 80 on a recent normally distributed exam the standard deviation is 10 what is the mean
For a normal distribution :
Zscore = (x - mean) / standard deviation
x = score
P(Z > 80) = 16% = 0.16 ; corresponding Zscore = 0.994 (Z probability calculator)
Therefore ;
0.994 = (80 - mean) / 10
0.994 * 10 = 80 - mean
9.94 = 80 - mean
Mean = 80 - 9.94
Mean = 70.06
Hence, the mean score = 70.06 = 70
If all the angle formed by line segments QA and AB has the same degree as the angle formed by line segments AB and BP, and line the following sets of line segments have the same length, then they are congruent triangles.
AP and QB
AQ and BP
Hope this helped.
21,28,35,42,49 are all multiples of 7
2.25t+5= 13.5t+14
-2.25t -2.25t
5= 11.25t+14
-14 -14
-9= 11.25t
-9/11.25=t
t= -0.8
