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

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours