Answer:
False, they have the same standard deviation
Step-by-step explanation:
Standard deviation is the distance each data value is from the mean.
While the mean of each data set will be different, the distance each data value is from this mean will be the same. This is because each set goes sequentially from 1 to 12, or from 101 to 112. The average distance from the mean will have to be the same.
To verify, using a graphing calculator, the standard deviation of the first set is 3.45. The standard deviation of the second set is also 3.45.
Answer:
4×3= 12
2x3=6
6+6=12
Is this what you are asking for?
Let Bea = x
Therefore Andrew = x + 2
Chris = x - 3
Andrew * Chris = 66
(x + 2)(x - 3) = 66 Remove the brackets.
x^2 + 2x - 3x - 6 = 66
x^2 - x - 6 = 66 Subtract 66 from both sides.
x^2 - x - 72 = 0
(x - 9)(x + 8) = 0
Find the possible values of Bea's age
x - 9 = 0
x = 9 That value works. She can be plus 9 years old.
x + 8 = 0
x = - 8. There's no way she can be - 8 years old
So Bea is 9.
9 <<<<<< Answer
Answer:
x < -10/7
Step-by-step explanation:
Divide both sides by -7. Because this divisor is negative, we must reverse the direction of the inequality sign, obtaining:
-7x < 10
----- < -----
-7 -7
Then x < -10/7
