It's B, I'm doing my online school assignment and this was the correct answer.
Firstly, understand prefixes :)
giga 1000000000
mega 1000000
kilo 1000
deci 0.1
centi 0.01
milli 0.001
micro 0.000001
nano 0.000000001
It is 11 33/40. 11 being the whole number and 33/40 the fraction
5 packs of erasers and 3 packs of pencils each will have 60
X=7 All you need to do is combine like terms and then move the appropriate terms to the appropriate side.