Answer:
a. About 64
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 70
Standard deviation = 5
Use the empirical rule to determine the number of students who scored less than 65 or more than 75?
65 = 70 - 5
So 65 is one standard deviation below the mean
75 = 70 + 5
So 75 is one standard deviation above the mean.
By the Empirical Rule, 68% of the students scored between 65 and 75. The other 100-68 = 32% scored less than 65 or more than 75.
Out of 200, that is
0.32*200 = 64
So the correct answer is:
a. About 64
Y=3x-1
y=3(-1) - 1
y= -3-1
y=-4
the answer is B.-4
Answer:
18, 7.4 (if its 12.6) and 52, 92 (if its 12x6)
Step-by-step explanation:
Answer:
TV = 66
Step-by-step explanation:
Since M is the midpoint, that means the two subsegments are equal so
7x - 2 = 4x + 13
7x - 4x - 2 = 13
7x - 4x = 13 + 2
3x = 15
x = 5
then
TM = 7x - 2 = 7*5 -2 = 35 - 2 = 33
TV = 2 * TM = 2 * 33 = 66
Answer:
8Parallel lines always have the same slope.
[I attached a picture that might help show you]
The lines do
NOT Intersect.
