Guys ,
simplify:

i) a/4 + 5a/12 - 9/3

ii) 3m - 4/6 + 2m - 5/15 - m + 7/20

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.

step-by-step explanation:

example answer: "to determine if a sum is reasonable you can round each number to the nearest whole and compare the estimated sum to the actual sum."

hope this you and anyone else who needs the answer : ^)

the answer should be 3.54 g/cm^3