Answer:
95%
Step-by-step explanation:
Given that in a large class, students' grade in a test followed the normal distribution.
The normal distribution is symmetric about the mean, bell shaped and having area of more than 99% between 3 std deviations from the mean on either side.
We are to find the percent of grades is between two standeard deviation below the mean and two standar deviation above the mean (that is in between Xbar-2S and Xbar+2S grades)
where x bar is the mean and s = std devition
This is equivalent to 100*Prob that X lies between these two values
As per normal distribution curve 68, 95, 99 rule we get
approximately 95% lie between these two values.
Answer:
a) f(x) = (-1/3)x + 8
b) f(x) = (1/3)x + 9
Step-by-step explanation:
f(x) = 1/3x - 8
a) To reflect across the x axis multiply f(x) by -1.
-f(x) = -1 (1/3x - 8)
= (-1/3)x + 8
b) to translate up 17 units add 17 to f(x)
f(x) + 17=
= 1/3x - 8 + 17
= 1/3x + 9
D is the correct answer because the bottom statement would be impossible because two positive don't equal a negative
the common denominator is 10 (between 5 and 2)
for each numerator:
we divide the common denominator with the denominator of each fraction and then multiply with the numerator of the fraction
first fraction's numerator:
10 (c.d.) : 5 (denominator) = 2
2 * 2 (numerator) = 4
second one:
10 (c.d.) : 2 (denominator) = 5
5 * 1 (numerator) = 5
The fractions are 4/10 and 5/10
Answer:
hi
Step-by-step explanation:
