Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.
Answer:
Step-by-step explanation:
4x² - 9
(2x)² - 3²
(2x + 3)(2x - 3)
Factor 1 spot:
2 tiles of x
3 tiles of positive 1
Factor 2 spot:
2 tiles of x
3 tiles of negative 1
Answer:
a,d,e
Step-by-step explanation:
Answer:
Option C
+ or - 3
Step-by-step explanation:
A quadratic equation will have equal roots if its Discriminant is equal to zero.
the discriminant in this case is 
considering the equation,

a = 9, b= 8k, c=8
Replacing the variables in the original equation with their respective values, we will have:

Note: The values of k are meant to be + or -2.12 as seen from the workings
However, these are not in the options given. the closest choice to it
is + or - 3