there are some red and white roses . 30% of the roses are red . there are 21 white roses. how many roses are there in total ?

The 21 white roses has to be 70% so what number can you add that makes up the other 30 %?

There are 9 red roses and 30 in total

The sum of the three angles of any triangle will always be 180 degrees because when all three angles are put together, they form a straight line.

Step-by-step explanation:

or

Sample Response: The sum of the three angles of any triangle will always be 180 degrees because when all three angles are put together, they form a straight line.