Answer:
Note that we need calculate the scores between the mean () and the mean plus 3 times the standard deviation. It is 3 times since the distance between the values given (513 and 759) divided by the standard deviation is 3 (
)
So the rule say that 99.7% of data is between and
, as it is a normal distribution half of 99.7% is between
and
. Hence 49.85% of people score between 513 and 759.
Answer:
There!!
Step-by-step explanation:
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Answer:
Step-by-step explanation:
O
3x² - 11x - 4 = 0
a = 3 ; b = -11 , c = -4
W
8x² + 12x = -1
8x² + 12x + 1 = 0
a = 8 ; b = 12 ; c = 1
L
x² + x = 6
x² + x - 6 = 0
a = 1 ; b= 1 ; c = -6
G
x²- 2x - 2 =0
a = 1 ; b = -2 ; c = -2
E
4x - 5 = -4x²
4x² + 4x - 5 = 0
a = 4 ; b = 4 ; c = -5
B
12x² +x -6 = 0
a = 12 ; b = 1 ; c = -6
R
2x² + 5x - 25 = 0
a = 2 ; b = 5 ; c = -25
A
6x² -5x - 4 = 0
a = 6 ; b = -5 ; c = -4