Rebecca's annual income is $20,and Jimmy's annual income is $10,. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?  Choose the correct choice from the following:
A) 8
B) 9
C) 7.77
D) 10
E) 11
total rebecca = x+20; total = x+20+10   x+20/x+30 = 55/100 therefore x =7.77   7.77
<result>C</result>
Rebecca's annual income is $20,and Jimmy's annual income is $10,. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?