Question

Please help me. I didn't get it

Answer 1

`(3)/(10)` +
`(2)/(5)`

Multiply the
`(2)/(5)` by 2 on both sides to get a common denominator of 10. You should end up with
`(4)/(10)`.


`(3)/(10)` +
`(4)/(10)` =
`(7)/(10)`

Get a common denominator between
`(7)/(10)` and
`(5)/(15)` to compare them -- a common denominator is 30. Multiply the
`(7)/(10)` by 3, and
`(5)/(15)` by 2.


`(21)/(30)` and
`(10)/(30)`
The
`(7)/(10)` is obviously much larger than
`(5)/(15)`.

Now look at the answers. Which are true?

B and E are easily seen as true, because we know that the total of
`(5)/(15)` is not reasonable/right.

The 2 statements that are true are (B) and (E).