|3x| = 9
|3x| = ±9
|3x| = 9 U |3x| = -9
3x = 9 U 3x = -9
3 3 3 3
x = 3 x = -3
|-3r| = 9
|-3r| = ±9
|-3r| = 9 U |-3r| = -9
3r = 9 U 3r = -9
3 3 3 3
r = 3 r = -3
¹/₅b = 1
5(¹/₅b) = 5(1)
b = 5
Answer: False.
Step-by-step explanation:
For any random variable x,
Formula to calculate the z-score : 
, where 
= Mean
= Standard deviation
Let x be the data point has a corresponding z-score of -1.5.
Then , we have
i.e. x is one and a half standard deviations below the mean value.
( one and a half =
)
Therefore , the given statement is false.
"<span>How many times more did Carol eat compared to Dima?" is quite different from the previous question, in which you asked "how much more did Carol eat than Dima?" I think they ate 10/25 and 9 /25 of the cake, respectively.
10/25 is greater than 9/25, obviously. We need to calculate "how many times greater is 10/25 than 9/25? So we divide 9/25 INTO 10/25. This comes out to 10/9, or 1.11 times as much. Carol eats 11% more cake than Dima. Hope she doesn't gain too much extra weight. ;)</span>
Step-by-step explanation:
12) y = 4 + 7x
x = 3,-1
y = 4 + 7(3) = 25
13) y = x - 11
x = 72,
y = 72 - 11 = 61
14) y = 6x - 5
y = 6(-4) - 5 = -29
y = -11 (x = -1)
y = -5 (x = 0)
y = 13 (x = 3)
15) y = x + 1, each relation is a function
16) An = 22 + (n-1)11
A(2) = 22 + 1(11) = 33
A(5) = 22 + 4(11) = 66
lesson 5,1
1 ------- A
2 ------ C
3 ------ A
