Is 3/12 a rational number

It is

Step-by-step explanation:

3/12 is actually a quarter which is equal to 0.25. It certainly isn't an irrational number, but is indeed a rational one.

3/12 is actually a quarter which is equal to 0.25.

In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator,p, and a non-zero denominator q. For example, −3/7 is a rational number, as is every integer.

Yes it is...

:)

Hope I got it right :P

After their weight change Alberto's mass is 54.2 kg and Frank's mass is 45.8 kg

Step-by-step explanation:

step 1

Find Alberto's mass after the change

Adds the kilograms he gains to its original mass

52.2+2=54.2 kg

step 2

Find Frank's mass after the change

Subtract the kilograms he losses from its original mass

48.8-3=45.8 kg

therefore

After their weight change Alberto's mass is 54.2 kg and Frank's mass is 45.8 kg