The most common source of income is investments. a. true b. false

False

Step-by-step explanation:

The most common source of income is employment.

There are lot of sources of income but an employment is once such source which is the most favourable. By employment, it means one person is getting paid for the services or work he/she is doing for some person or organisation.  It is a clear means of working & getting paid for it within a stipulated time period.

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1