Answer:
well all of these look like a way so we have to use elimination method
A : random number tables : well it has random numbers so X out
B: PHONE NUMBERS: well phone numbers are random so X out
C: USing the internet : totally X out
D: books of random numbers: X out
so none of the above i guess
add 4n and 5n, which is 9. 9n=-9, and if u divide both sides by nine, n=-1
Answer:
lets just say the f stands for 1 and 1 times negative 4 is negative 4
and 5 will stay 5 the equation would be -4/5 so after u divide the 4 and the five you get negative 1
