Identify the sampling technique used.

at a local community college, five statistics classes are randomly selected out of 20 and all of the students from each class are interviewed.
a) cluster
b) stratified
c) systematic
d) random
e) convenience

its 4 because 2 times 2 is 4, if you double the number two you get four

plz yuo

step-by-step explanation:

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation

add 8+12 to get a simplified answer of 12r-20